X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/ff81ee6e8304a1982a3ec4f5b134764a29d502cf..a6f44f0edcda2471c5a33e4156c1c9488c7f3210:/wp-includes/functions.php

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index c6f6ea7a..ea774868 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -1,2290 +1,4072 @@
 <?php
-
-require_once(dirname(__FILE__).'/functions-compat.php');
-
-if ( !function_exists('_') ) {
-	function _($string) {
-		return $string;
-	}
-}
-
-function get_profile($field, $user = false) {
-	global $wpdb;
-	if ( !$user )
-		$user = $wpdb->escape($_COOKIE[USER_COOKIE]);
-	return $wpdb->get_var("SELECT $field FROM $wpdb->users WHERE user_login = '$user'");
-}
-
-function mysql2date($dateformatstring, $mysqlstring, $translate = true) {
-	global $month, $weekday, $month_abbrev, $weekday_abbrev;
-	$m = $mysqlstring;
-	if ( empty($m) ) {
+/**
+ * Main WordPress API
+ *
+ * @package WordPress
+ */
+
+require( ABSPATH . WPINC . '/option.php' );
+
+/**
+ * Converts given date string into a different format.
+ *
+ * $format should be either a PHP date format string, e.g. 'U' for a Unix
+ * timestamp, or 'G' for a Unix timestamp assuming that $date is GMT.
+ *
+ * If $translate is true then the given date and format string will
+ * be passed to date_i18n() for translation.
+ *
+ * @since 0.71
+ *
+ * @param string $format Format of the date to return.
+ * @param string $date Date string to convert.
+ * @param bool $translate Whether the return date should be translated. Default is true.
+ * @return string|int Formatted date string, or Unix timestamp.
+ */
+function mysql2date( $format, $date, $translate = true ) {
+	if ( empty( $date ) )
 		return false;
-	}
-	$i = mktime(substr($m,11,2),substr($m,14,2),substr($m,17,2),substr($m,5,2),substr($m,8,2),substr($m,0,4));
-	
-	if ( -1 == $i || false == $i )
-		$i = 0;
 
-	if ( !empty($month) && !empty($weekday) && $translate ) {
-		$datemonth = $month[date('m', $i)];
-		$datemonth_abbrev = $month_abbrev[$datemonth];
-		$dateweekday = $weekday[date('w', $i)];
-		$dateweekday_abbrev = $weekday_abbrev[$dateweekday];
-		$dateformatstring = ' '.$dateformatstring;
-		$dateformatstring = preg_replace("/([^\\\])D/", "\\1".backslashit($dateweekday_abbrev), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])F/", "\\1".backslashit($datemonth), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])l/", "\\1".backslashit($dateweekday), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])M/", "\\1".backslashit($datemonth_abbrev), $dateformatstring);
+	if ( 'G' == $format )
+		return strtotime( $date . ' +0000' );
 
-		$dateformatstring = substr($dateformatstring, 1, strlen($dateformatstring)-1);
-	}
-	$j = @date($dateformatstring, $i);
-	if ( !$j ) {
-	// for debug purposes
-	//	echo $i." ".$mysqlstring;
-	}
-	return $j;
-}
+	$i = strtotime( $date );
 
-function current_time($type, $gmt = 0) {
-	switch ($type) {
+	if ( 'U' == $format )
+		return $i;
+
+	if ( $translate )
+		return date_i18n( $format, $i );
+	else
+		return date( $format, $i );
+}
+
+/**
+ * Retrieve the current time based on specified type.
+ *
+ * The 'mysql' type will return the time in the format for MySQL DATETIME field.
+ * The 'timestamp' type will return the current timestamp.
+ *
+ * If $gmt is set to either '1' or 'true', then both types will use GMT time.
+ * if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.
+ *
+ * @since 1.0.0
+ *
+ * @param string $type Either 'mysql' or 'timestamp'.
+ * @param int|bool $gmt Optional. Whether to use GMT timezone. Default is false.
+ * @return int|string String if $type is 'gmt', int if $type is 'timestamp'.
+ */
+function current_time( $type, $gmt = 0 ) {
+	switch ( $type ) {
 		case 'mysql':
-			if ( $gmt ) $d = gmdate('Y-m-d H:i:s');
-			else $d = gmdate('Y-m-d H:i:s', (time() + (get_settings('gmt_offset') * 3600)));
-			return $d;
+			return ( $gmt ) ? gmdate( 'Y-m-d H:i:s' ) : gmdate( 'Y-m-d H:i:s', ( time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) ) );
 			break;
 		case 'timestamp':
-			if ( $gmt ) $d = time();
-			else $d = time() + (get_settings('gmt_offset') * 3600);
-			return $d;
+			return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
 			break;
 	}
 }
 
-function date_i18n($dateformatstring, $unixtimestamp) {
-	global $month, $weekday, $month_abbrev, $weekday_abbrev;
+/**
+ * Retrieve the date in localized format, based on timestamp.
+ *
+ * If the locale specifies the locale month and weekday, then the locale will
+ * take over the format for the date. If it isn't, then the date format string
+ * will be used instead.
+ *
+ * @since 0.71
+ *
+ * @param string $dateformatstring Format to display the date.
+ * @param int $unixtimestamp Optional. Unix timestamp.
+ * @param bool $gmt Optional, default is false. Whether to convert to GMT for time.
+ * @return string The date, translated if locale specifies it.
+ */
+function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
+	global $wp_locale;
 	$i = $unixtimestamp;
-	if ( (!empty($month)) && (!empty($weekday)) ) {
-		$datemonth = $month[date('m', $i)];
-		$datemonth_abbrev = $month_abbrev[$datemonth];
-		$dateweekday = $weekday[date('w', $i)];
-		$dateweekday_abbrev = $weekday_abbrev[$dateweekday];
+
+	if ( false === $i ) {
+		if ( ! $gmt )
+			$i = current_time( 'timestamp' );
+		else
+			$i = time();
+		// we should not let date() interfere with our
+		// specially computed timestamp
+		$gmt = true;
+	}
+
+	// store original value for language with untypical grammars
+	// see http://core.trac.wordpress.org/ticket/9396
+	$req_format = $dateformatstring;
+
+	$datefunc = $gmt? 'gmdate' : 'date';
+
+	if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
+		$datemonth = $wp_locale->get_month( $datefunc( 'm', $i ) );
+		$datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
+		$dateweekday = $wp_locale->get_weekday( $datefunc( 'w', $i ) );
+		$dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
+		$datemeridiem = $wp_locale->get_meridiem( $datefunc( 'a', $i ) );
+		$datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( 'A', $i ) );
 		$dateformatstring = ' '.$dateformatstring;
-		$dateformatstring = preg_replace("/([^\\\])D/", "\${1}".backslashit($dateweekday_abbrev), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])F/", "\${1}".backslashit($datemonth), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])l/", "\${1}".backslashit($dateweekday), $dateformatstring);
-		$dateformatstring = preg_replace("/([^\\\])M/", "\${1}".backslashit($datemonth_abbrev), $dateformatstring);
-		$dateformatstring = substr($dateformatstring, 1, strlen($dateformatstring)-1);
+		$dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
+		$dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );
+		$dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );
+		$dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
+		$dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );
+		$dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );
+
+		$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
+	}
+	$timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );
+	$timezone_formats_re = implode( '|', $timezone_formats );
+	if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {
+		$timezone_string = get_option( 'timezone_string' );
+		if ( $timezone_string ) {
+			$timezone_object = timezone_open( $timezone_string );
+			$date_object = date_create( null, $timezone_object );
+			foreach( $timezone_formats as $timezone_format ) {
+				if ( false !== strpos( $dateformatstring, $timezone_format ) ) {
+					$formatted = date_format( $date_object, $timezone_format );
+					$dateformatstring = ' '.$dateformatstring;
+					$dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );
+					$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
+				}
+			}
+		}
 	}
-	$j = @date($dateformatstring, $i);
+	$j = @$datefunc( $dateformatstring, $i );
+	// allow plugins to redo this entirely for languages with untypical grammars
+	$j = apply_filters('date_i18n', $j, $req_format, $i, $gmt);
 	return $j;
-	}
+}
 
-function get_weekstartend($mysqlstring, $start_of_week) {
-	$my = substr($mysqlstring,0,4);
-	$mm = substr($mysqlstring,8,2);
-	$md = substr($mysqlstring,5,2);
-	$day = mktime(0,0,0, $md, $mm, $my);
-	$weekday = date('w',$day);
-	$i = 86400;
-
-	if ( $weekday < get_settings('start_of_week') )
-		$weekday = 7 - (get_settings('start_of_week') - $weekday);
-
-	while ($weekday > get_settings('start_of_week')) {
-		$weekday = date('w',$day);
-		if ( $weekday < get_settings('start_of_week') )
-			$weekday = 7 - (get_settings('start_of_week') - $weekday);
-
-		$day = $day - 86400;
-		$i = 0;
-	}
-	$week['start'] = $day + 86400 - $i;
-	// $week['end'] = $day - $i + 691199;
-	$week['end'] = $week['start'] + 604799;
-	return $week;
-}
-
-function get_lastpostdate($timezone = 'server') {
-	global $cache_lastpostdate, $pagenow, $wpdb;
-	$add_seconds_blog = get_settings('gmt_offset') * 3600;
-	$add_seconds_server = date('Z');
-	$now = current_time('mysql', 1);
-	if ( !isset($cache_lastpostdate[$timezone]) ) {
-		switch(strtolower($timezone)) {
-			case 'gmt':
-				$lastpostdate = $wpdb->get_var("SELECT post_date_gmt FROM $wpdb->posts WHERE post_date_gmt <= '$now' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
-				break;
-			case 'blog':
-				$lastpostdate = $wpdb->get_var("SELECT post_date FROM $wpdb->posts WHERE post_date_gmt <= '$now' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
-				break;
-			case 'server':
-				$lastpostdate = $wpdb->get_var("SELECT DATE_ADD(post_date_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_date_gmt <= '$now' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1");
-				break;
-		}
-		$cache_lastpostdate[$timezone] = $lastpostdate;
+/**
+ * Convert integer number to format based on the locale.
+ *
+ * @since 2.3.0
+ *
+ * @param int $number The number to convert based on locale.
+ * @param int $decimals Precision of the number of decimal places.
+ * @return string Converted number in string format.
+ */
+function number_format_i18n( $number, $decimals = 0 ) {
+	global $wp_locale;
+	$formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
+	return apply_filters( 'number_format_i18n', $formatted );
+}
+
+/**
+ * Convert number of bytes largest unit bytes will fit into.
+ *
+ * It is easier to read 1kB than 1024 bytes and 1MB than 1048576 bytes. Converts
+ * number of bytes to human readable number by taking the number of that unit
+ * that the bytes will go into it. Supports TB value.
+ *
+ * Please note that integers in PHP are limited to 32 bits, unless they are on
+ * 64 bit architecture, then they have 64 bit size. If you need to place the
+ * larger size then what PHP integer type will hold, then use a string. It will
+ * be converted to a double, which should always have 64 bit length.
+ *
+ * Technically the correct unit names for powers of 1024 are KiB, MiB etc.
+ * @link http://en.wikipedia.org/wiki/Byte
+ *
+ * @since 2.3.0
+ *
+ * @param int|string $bytes Number of bytes. Note max integer size for integers.
+ * @param int $decimals Precision of number of decimal places. Deprecated.
+ * @return bool|string False on failure. Number string on success.
+ */
+function size_format( $bytes, $decimals = 0 ) {
+	$quant = array(
+		// ========================= Origin ====
+		'TB' => 1099511627776,  // pow( 1024, 4)
+		'GB' => 1073741824,     // pow( 1024, 3)
+		'MB' => 1048576,        // pow( 1024, 2)
+		'kB' => 1024,           // pow( 1024, 1)
+		'B ' => 1,              // pow( 1024, 0)
+	);
+	foreach ( $quant as $unit => $mag )
+		if ( doubleval($bytes) >= $mag )
+			return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
+
+	return false;
+}
+
+/**
+ * Get the week start and end from the datetime or date string from mysql.
+ *
+ * @since 0.71
+ *
+ * @param string $mysqlstring Date or datetime field type from mysql.
+ * @param int $start_of_week Optional. Start of the week as an integer.
+ * @return array Keys are 'start' and 'end'.
+ */
+function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
+	$my = substr( $mysqlstring, 0, 4 ); // Mysql string Year
+	$mm = substr( $mysqlstring, 8, 2 ); // Mysql string Month
+	$md = substr( $mysqlstring, 5, 2 ); // Mysql string day
+	$day = mktime( 0, 0, 0, $md, $mm, $my ); // The timestamp for mysqlstring day.
+	$weekday = date( 'w', $day ); // The day of the week from the timestamp
+	if ( !is_numeric($start_of_week) )
+		$start_of_week = get_option( 'start_of_week' );
+
+	if ( $weekday < $start_of_week )
+		$weekday += 7;
+
+	$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week ); // The most recent week start day on or before $day
+	$end = $start + 7 * DAY_IN_SECONDS - 1; // $start + 7 days - 1 second
+	return compact( 'start', 'end' );
+}
+
+/**
+ * Unserialize value only if it was serialized.
+ *
+ * @since 2.0.0
+ *
+ * @param string $original Maybe unserialized original, if is needed.
+ * @return mixed Unserialized data can be any type.
+ */
+function maybe_unserialize( $original ) {
+	if ( is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
+		return @unserialize( $original );
+	return $original;
+}
+
+/**
+ * Check value to find if it was serialized.
+ *
+ * If $data is not an string, then returned value will always be false.
+ * Serialized data is always a string.
+ *
+ * @since 2.0.5
+ *
+ * @param mixed $data Value to check to see if was serialized.
+ * @param bool $strict Optional. Whether to be strict about the end of the string. Defaults true.
+ * @return bool False if not serialized and true if it was.
+ */
+function is_serialized( $data, $strict = true ) {
+	// if it isn't a string, it isn't serialized
+	if ( ! is_string( $data ) )
+		return false;
+	$data = trim( $data );
+ 	if ( 'N;' == $data )
+		return true;
+	$length = strlen( $data );
+	if ( $length < 4 )
+		return false;
+	if ( ':' !== $data[1] )
+		return false;
+	if ( $strict ) {
+		$lastc = $data[ $length - 1 ];
+		if ( ';' !== $lastc && '}' !== $lastc )
+			return false;
 	} else {
-		$lastpostdate = $cache_lastpostdate[$timezone];
+		$semicolon = strpos( $data, ';' );
+		$brace     = strpos( $data, '}' );
+		// Either ; or } must exist.
+		if ( false === $semicolon && false === $brace )
+			return false;
+		// But neither must be in the first X characters.
+		if ( false !== $semicolon && $semicolon < 3 )
+			return false;
+		if ( false !== $brace && $brace < 4 )
+			return false;
 	}
-	return $lastpostdate;
+	$token = $data[0];
+	switch ( $token ) {
+		case 's' :
+			if ( $strict ) {
+				if ( '"' !== $data[ $length - 2 ] )
+					return false;
+			} elseif ( false === strpos( $data, '"' ) ) {
+				return false;
+			}
+		case 'a' :
+		case 'O' :
+			return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
+		case 'b' :
+		case 'i' :
+		case 'd' :
+			$end = $strict ? '$' : '';
+			return (bool) preg_match( "/^{$token}:[0-9.E-]+;$end/", $data );
+	}
+	return false;
 }
 
-function get_lastpostmodified($timezone = 'server') {
-	global $cache_lastpostmodified, $pagenow, $wpdb;
-	$add_seconds_blog = get_settings('gmt_offset') * 3600;
-	$add_seconds_server = date('Z');
-	$now = current_time('mysql', 1);
-	if ( !isset($cache_lastpostmodified[$timezone]) ) {
-		switch(strtolower($timezone)) {
-			case 'gmt':
-				$lastpostmodified = $wpdb->get_var("SELECT post_modified_gmt FROM $wpdb->posts WHERE post_modified_gmt <= '$now' AND post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
-				break;
-			case 'blog':
-				$lastpostmodified = $wpdb->get_var("SELECT post_modified FROM $wpdb->posts WHERE post_modified_gmt <= '$now' AND post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
-				break;
-			case 'server':
-				$lastpostmodified = $wpdb->get_var("SELECT DATE_ADD(post_modified_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_modified_gmt <= '$now' AND post_status = 'publish' ORDER BY post_modified_gmt DESC LIMIT 1");
-				break;
-		}
-		$lastpostdate = get_lastpostdate($timezone);
-		if ( $lastpostdate > $lastpostmodified ) {
-			$lastpostmodified = $lastpostdate;
-		}
-		$cache_lastpostmodified[$timezone] = $lastpostmodified;
+/**
+ * Check whether serialized data is of string type.
+ *
+ * @since 2.0.5
+ *
+ * @param mixed $data Serialized data
+ * @return bool False if not a serialized string, true if it is.
+ */
+function is_serialized_string( $data ) {
+	// if it isn't a string, it isn't a serialized string
+	if ( !is_string( $data ) )
+		return false;
+	$data = trim( $data );
+	$length = strlen( $data );
+	if ( $length < 4 )
+		return false;
+	elseif ( ':' !== $data[1] )
+		return false;
+	elseif ( ';' !== $data[$length-1] )
+		return false;
+	elseif ( $data[0] !== 's' )
+		return false;
+	elseif ( '"' !== $data[$length-2] )
+		return false;
+	else
+		return true;
+}
+
+/**
+ * Serialize data, if needed.
+ *
+ * @since 2.0.5
+ *
+ * @param mixed $data Data that might be serialized.
+ * @return mixed A scalar data
+ */
+function maybe_serialize( $data ) {
+	if ( is_array( $data ) || is_object( $data ) )
+		return serialize( $data );
+
+	// Double serialization is required for backward compatibility.
+	// See http://core.trac.wordpress.org/ticket/12930
+	if ( is_serialized( $data, false ) )
+		return serialize( $data );
+
+	return $data;
+}
+
+/**
+ * Retrieve post title from XMLRPC XML.
+ *
+ * If the title element is not part of the XML, then the default post title from
+ * the $post_default_title will be used instead.
+ *
+ * @package WordPress
+ * @subpackage XMLRPC
+ * @since 0.71
+ *
+ * @global string $post_default_title Default XMLRPC post title.
+ *
+ * @param string $content XMLRPC XML Request content
+ * @return string Post title
+ */
+function xmlrpc_getposttitle( $content ) {
+	global $post_default_title;
+	if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {
+		$post_title = $matchtitle[1];
 	} else {
-		$lastpostmodified = $cache_lastpostmodified[$timezone];
+		$post_title = $post_default_title;
 	}
-	return $lastpostmodified;
+	return $post_title;
 }
 
-function user_pass_ok($user_login,$user_pass) {
-	global $cache_userdata;
-	if ( empty($cache_userdata[$user_login]) ) {
-		$userdata = get_userdatabylogin($user_login);
+/**
+ * Retrieve the post category or categories from XMLRPC XML.
+ *
+ * If the category element is not found, then the default post category will be
+ * used. The return type then would be what $post_default_category. If the
+ * category is found, then it will always be an array.
+ *
+ * @package WordPress
+ * @subpackage XMLRPC
+ * @since 0.71
+ *
+ * @global string $post_default_category Default XMLRPC post category.
+ *
+ * @param string $content XMLRPC XML Request content
+ * @return string|array List of categories or category name.
+ */
+function xmlrpc_getpostcategory( $content ) {
+	global $post_default_category;
+	if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {
+		$post_category = trim( $matchcat[1], ',' );
+		$post_category = explode( ',', $post_category );
 	} else {
-		$userdata = $cache_userdata[$user_login];
+		$post_category = $post_default_category;
 	}
-	return (md5($user_pass) == $userdata->user_pass);
+	return $post_category;
 }
 
-
-function get_usernumposts($userid) {
-	global $wpdb;
-	return $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->posts WHERE post_author = '$userid' AND post_status = 'publish'");
+/**
+ * XMLRPC XML content without title and category elements.
+ *
+ * @package WordPress
+ * @subpackage XMLRPC
+ * @since 0.71
+ *
+ * @param string $content XMLRPC XML Request content
+ * @return string XMLRPC XML Request content without title and category elements.
+ */
+function xmlrpc_removepostdata( $content ) {
+	$content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );
+	$content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );
+	$content = trim( $content );
+	return $content;
 }
 
+/**
+ * Check content for video and audio links to add as enclosures.
+ *
+ * Will not add enclosures that have already been added and will
+ * remove enclosures that are no longer in the post. This is called as
+ * pingbacks and trackbacks.
+ *
+ * @package WordPress
+ * @since 1.5.0
+ *
+ * @uses $wpdb
+ *
+ * @param string $content Post Content
+ * @param int $post_ID Post ID
+ */
+function do_enclose( $content, $post_ID ) {
+	global $wpdb;
 
-// examine a url (supposedly from this blog) and try to
-// determine the post ID it represents.
-function url_to_postid($url) {
-	global $wp_rewrite;
+	//TODO: Tidy this ghetto code up and make the debug code optional
+	include_once( ABSPATH . WPINC . '/class-IXR.php' );
 
-	// First, check to see if there is a 'p=N' or 'page_id=N' to match against
-	preg_match('#[?&](p|page_id)=(\d+)#', $url, $values);
-	$id = intval($values[2]);
-	if ( $id ) return $id;
+	$post_links = array();
 
-	// Check to see if we are using rewrite rules
-	$rewrite = $wp_rewrite->wp_rewrite_rules();
+	$pung = get_enclosed( $post_ID );
 
-	// Not using rewrite rules, and 'p=N' and 'page_id=N' methods failed, so we're out of options
-	if ( empty($rewrite) )
-		return 0;
+	$ltrs = '\w';
+	$gunk = '/#~:.?+=&%@!\-';
+	$punc = '.:?\-';
+	$any = $ltrs . $gunk . $punc;
 
-	// $url cleanup by Mark Jaquith
-	// This fixes things like #anchors, ?query=strings, missing 'www.',
-	// added 'www.', or added 'index.php/' that will mess up our WP_Query
-	// and return a false negative
+	preg_match_all( "{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp );
 
-	// Get rid of the #anchor
-	$url_split = explode('#', $url);
-	$url = $url_split[0];
+	foreach ( $pung as $link_test ) {
+		if ( !in_array( $link_test, $post_links_temp[0] ) ) { // link no longer in post
+			$mids = $wpdb->get_col( $wpdb->prepare("SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $link_test ) . '%') );
+			foreach ( $mids as $mid )
+				delete_metadata_by_mid( 'post', $mid );
+		}
+	}
 
-	// Get rid of URI ?query=string
-	$url_split = explode('?', $url);
-	$url = $url_split[0];
+	foreach ( (array) $post_links_temp[0] as $link_test ) {
+		if ( !in_array( $link_test, $pung ) ) { // If we haven't pung it already
+			$test = @parse_url( $link_test );
+			if ( false === $test )
+				continue;
+			if ( isset( $test['query'] ) )
+				$post_links[] = $link_test;
+			elseif ( isset($test['path']) && ( $test['path'] != '/' ) &&  ($test['path'] != '' ) )
+				$post_links[] = $link_test;
+		}
+	}
 
-	// Add 'www.' if it is absent and should be there
-	if ( false !== strpos(get_settings('home'), '://www.') && false === strpos($url, '://www.') )
-		$url = str_replace('://', '://www.', $url);
+	foreach ( (array) $post_links as $url ) {
+		if ( $url != '' && !$wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $url ) . '%' ) ) ) {
 
-	// Strip 'www.' if it is present and shouldn't be
-	if ( false === strpos(get_settings('home'), '://www.') )
-		$url = str_replace('://www.', '://', $url);
+			if ( $headers = wp_get_http_headers( $url) ) {
+				$len = isset( $headers['content-length'] ) ? (int) $headers['content-length'] : 0;
+				$type = isset( $headers['content-type'] ) ? $headers['content-type'] : '';
+				$allowed_types = array( 'video', 'audio' );
 
-	// Strip 'index.php/' if we're not using path info permalinks
-	if ( false === strpos($rewrite, 'index.php/') )
-		$url = str_replace('index.php/', '', $url);
+				// Check to see if we can figure out the mime type from
+				// the extension
+				$url_parts = @parse_url( $url );
+				if ( false !== $url_parts ) {
+					$extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );
+					if ( !empty( $extension ) ) {
+						foreach ( wp_get_mime_types() as $exts => $mime ) {
+							if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
+								$type = $mime;
+								break;
+							}
+						}
+					}
+				}
 
-	if ( false !== strpos($url, get_settings('home')) ) {
-		// Chop off http://domain.com
-		$url = str_replace(get_settings('home'), '', $url);
-	} else {
-		// Chop off /path/to/blog
-		$home_path = parse_url(get_settings('home'));
-		$home_path = $home_path['path'];
-		$url = str_replace($home_path, '', $url);
+				if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {
+					add_post_meta( $post_ID, 'enclosure', "$url\n$len\n$mime\n" );
+				}
+			}
+		}
 	}
+}
 
-	// Trim leading and lagging slashes
-	$url = trim($url, '/');
+/**
+ * Perform a HTTP HEAD or GET request.
+ *
+ * If $file_path is a writable filename, this will do a GET request and write
+ * the file to that path.
+ *
+ * @since 2.5.0
+ *
+ * @param string $url URL to fetch.
+ * @param string|bool $file_path Optional. File path to write request to.
+ * @param int $red (private) The number of Redirects followed, Upon 5 being hit, returns false.
+ * @return bool|string False on failure and string of headers if HEAD request.
+ */
+function wp_get_http( $url, $file_path = false, $red = 1 ) {
+	@set_time_limit( 60 );
 
-	$request = $url;
+	if ( $red > 5 )
+		return false;
 
-	// Done with cleanup
+	$options = array();
+	$options['redirection'] = 5;
 
-	// Look for matches.
-	$request_match = $request;
-	foreach ($rewrite as $match => $query) {
-		// If the requesting file is the anchor of the match, prepend it
-		// to the path info.
-		if ( (! empty($url)) && (strpos($match, $url) === 0) ) {
-			$request_match = $url . '/' . $request;
-		}
+	if ( false == $file_path )
+		$options['method'] = 'HEAD';
+	else
+		$options['method'] = 'GET';
 
-		if ( preg_match("!^$match!", $request_match, $matches) ) {
-			// Got a match.
-			// Trim the query of everything up to the '?'.
-			$query = preg_replace("!^.+\?!", '', $query);
+	$response = wp_safe_remote_request( $url, $options );
 
-			// Substitute the substring matches into the query.
-			eval("\$query = \"$query\";");
-			$query = new WP_Query($query);
-			if ( $query->is_single || $query->is_page )
-				return $query->post->ID;
-			else
-				return 0;
-		}
-	}
-	return 0;
-}
+	if ( is_wp_error( $response ) )
+		return false;
 
+	$headers = wp_remote_retrieve_headers( $response );
+	$headers['response'] = wp_remote_retrieve_response_code( $response );
 
-function maybe_unserialize($original) {
-	if ( false !== $gm = @ unserialize($original) )
-		return $gm;
-	else
-		return $original;
-}
+	// WP_HTTP no longer follows redirects for HEAD requests.
+	if ( 'HEAD' == $options['method'] && in_array($headers['response'], array(301, 302)) && isset( $headers['location'] ) ) {
+		return wp_get_http( $headers['location'], $file_path, ++$red );
+	}
 
-/* Options functions */
+	if ( false == $file_path )
+		return $headers;
 
-function get_settings($setting) {
-	global $wpdb;
+	// GET request - write it to the supplied filename
+	$out_fp = fopen($file_path, 'w');
+	if ( !$out_fp )
+		return $headers;
 
-	$value = wp_cache_get($setting, 'options');
+	fwrite( $out_fp,  wp_remote_retrieve_body( $response ) );
+	fclose($out_fp);
+	clearstatcache();
 
-	if ( false === $value ) {
-		if ( defined('WP_INSTALLING') )
-			$wpdb->hide_errors();
-		$row = $wpdb->get_row("SELECT option_value FROM $wpdb->options WHERE option_name = '$setting' LIMIT 1");
-		if ( defined('WP_INSTALLING') )
-			$wpdb->show_errors();
+	return $headers;
+}
 
-		if( is_object( $row) ) { // Has to be get_row instead of get_var because of funkiness with 0, false, null values
-			$value = $row->option_value;
-			wp_cache_set($setting, $value, 'options');
-		} else {
-			return false;
-		}
-	}
+/**
+ * Retrieve HTTP Headers from URL.
+ *
+ * @since 1.5.1
+ *
+ * @param string $url
+ * @param bool $deprecated Not Used.
+ * @return bool|string False on failure, headers on success.
+ */
+function wp_get_http_headers( $url, $deprecated = false ) {
+	if ( !empty( $deprecated ) )
+		_deprecated_argument( __FUNCTION__, '2.7' );
 
-	// If home is not set use siteurl.
-	if ( 'home' == $setting && '' == $value )
-		return get_settings('siteurl');
+	$response = wp_safe_remote_head( $url );
 
-	if ( 'siteurl' == $setting || 'home' == $setting || 'category_base' == $setting )
-		$value = preg_replace('|/+$|', '', $value);
+	if ( is_wp_error( $response ) )
+		return false;
 
-	return apply_filters( 'option_' . $setting, maybe_unserialize($value) );
+	return wp_remote_retrieve_headers( $response );
 }
 
-function get_option($option) {
-	return get_settings($option);
+/**
+ * Whether today is a new day.
+ *
+ * @since 0.71
+ * @uses $day Today
+ * @uses $previousday Previous day
+ *
+ * @return int 1 when new day, 0 if not a new day.
+ */
+function is_new_day() {
+	global $currentday, $previousday;
+	if ( $currentday != $previousday )
+		return 1;
+	else
+		return 0;
 }
 
-function get_user_option( $option, $user = 0 ) {
-	global $wpdb, $current_user;
-	
-	if ( empty($user) )
-		$user = $current_user;
-	else
-		$user = get_userdata($user);
+/**
+ * Build URL query based on an associative and, or indexed array.
+ *
+ * This is a convenient function for easily building url queries. It sets the
+ * separator to '&' and uses _http_build_query() function.
+ *
+ * @see _http_build_query() Used to build the query
+ * @link http://us2.php.net/manual/en/function.http-build-query.php more on what
+ *		http_build_query() does.
+ *
+ * @since 2.3.0
+ *
+ * @param array $data URL-encode key/value pairs.
+ * @return string URL encoded string
+ */
+function build_query( $data ) {
+	return _http_build_query( $data, null, '&', '', false );
+}
+
+// from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
+function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
+	$ret = array();
+
+	foreach ( (array) $data as $k => $v ) {
+		if ( $urlencode)
+			$k = urlencode($k);
+		if ( is_int($k) && $prefix != null )
+			$k = $prefix.$k;
+		if ( !empty($key) )
+			$k = $key . '%5B' . $k . '%5D';
+		if ( $v === null )
+			continue;
+		elseif ( $v === FALSE )
+			$v = '0';
 
-	if ( isset( $user->{$wpdb->prefix . $option} ) ) // Blog specific
-		return $user->{$wpdb->prefix . $option};
-	elseif ( isset( $user->{$option} ) ) // User specific and cross-blog
-		return $user->{$option};
-	else // Blog global
-		return get_option( $option );
-}
+		if ( is_array($v) || is_object($v) )
+			array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
+		elseif ( $urlencode )
+			array_push($ret, $k.'='.urlencode($v));
+		else
+			array_push($ret, $k.'='.$v);
+	}
+
+	if ( null === $sep )
+		$sep = ini_get('arg_separator.output');
+
+	return implode($sep, $ret);
+}
+
+/**
+ * Retrieve a modified URL query string.
+ *
+ * You can rebuild the URL and append a new query variable to the URL query by
+ * using this function. You can also retrieve the full URL with query data.
+ *
+ * Adding a single key & value or an associative array. Setting a key value to
+ * an empty string removes the key. Omitting oldquery_or_uri uses the $_SERVER
+ * value. Additional values provided are expected to be encoded appropriately
+ * with urlencode() or rawurlencode().
+ *
+ * @since 1.5.0
+ *
+ * @param mixed $param1 Either newkey or an associative_array
+ * @param mixed $param2 Either newvalue or oldquery or uri
+ * @param mixed $param3 Optional. Old query or uri
+ * @return string New URL query string.
+ */
+function add_query_arg() {
+	$ret = '';
+	$args = func_get_args();
+	if ( is_array( $args[0] ) ) {
+		if ( count( $args ) < 2 || false === $args[1] )
+			$uri = $_SERVER['REQUEST_URI'];
+		else
+			$uri = $args[1];
+	} else {
+		if ( count( $args ) < 3 || false === $args[2] )
+			$uri = $_SERVER['REQUEST_URI'];
+		else
+			$uri = $args[2];
+	}
 
-function form_option($option) {
-	echo htmlspecialchars( get_option($option), ENT_QUOTES );
-}
+	if ( $frag = strstr( $uri, '#' ) )
+		$uri = substr( $uri, 0, -strlen( $frag ) );
+	else
+		$frag = '';
+
+	if ( 0 === stripos( $uri, 'http://' ) ) {
+		$protocol = 'http://';
+		$uri = substr( $uri, 7 );
+	} elseif ( 0 === stripos( $uri, 'https://' ) ) {
+		$protocol = 'https://';
+		$uri = substr( $uri, 8 );
+	} else {
+		$protocol = '';
+	}
 
-function get_alloptions() {
-	global $wpdb, $wp_queries;
-	$wpdb->hide_errors();
-	if ( !$options = $wpdb->get_results("SELECT option_name, option_value FROM $wpdb->options WHERE autoload = 'yes'") ) {
-		$options = $wpdb->get_results("SELECT option_name, option_value FROM $wpdb->options");
+	if ( strpos( $uri, '?' ) !== false ) {
+		$parts = explode( '?', $uri, 2 );
+		if ( 1 == count( $parts ) ) {
+			$base = '?';
+			$query = $parts[0];
+		} else {
+			$base = $parts[0] . '?';
+			$query = $parts[1];
+		}
+	} elseif ( $protocol || strpos( $uri, '=' ) === false ) {
+		$base = $uri . '?';
+		$query = '';
+	} else {
+		$base = '';
+		$query = $uri;
 	}
-	$wpdb->show_errors();
 
-	foreach ($options as $option) {
-		// "When trying to design a foolproof system,
-		//  never underestimate the ingenuity of the fools :)" -- Dougal
-		if ( 'siteurl' == $option->option_name )
-			$option->option_value = preg_replace('|/+$|', '', $option->option_value);
-		if ( 'home' == $option->option_name )
-			$option->option_value = preg_replace('|/+$|', '', $option->option_value);
-		if ( 'category_base' == $option->option_name )
-			$option->option_value = preg_replace('|/+$|', '', $option->option_value);
-		$value = maybe_unserialize($option->option_value);
-		$all_options->{$option->option_name} = apply_filters('pre_option_' . $option->option_name, $value);
+	wp_parse_str( $query, $qs );
+	$qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
+	if ( is_array( $args[0] ) ) {
+		$kayvees = $args[0];
+		$qs = array_merge( $qs, $kayvees );
+	} else {
+		$qs[ $args[0] ] = $args[1];
+	}
+
+	foreach ( $qs as $k => $v ) {
+		if ( $v === false )
+			unset( $qs[$k] );
+	}
+
+	$ret = build_query( $qs );
+	$ret = trim( $ret, '?' );
+	$ret = preg_replace( '#=(&|$)#', '$1', $ret );
+	$ret = $protocol . $base . $ret . $frag;
+	$ret = rtrim( $ret, '?' );
+	return $ret;
+}
+
+/**
+ * Removes an item or list from the query string.
+ *
+ * @since 1.5.0
+ *
+ * @param string|array $key Query key or keys to remove.
+ * @param bool $query When false uses the $_SERVER value.
+ * @return string New URL query string.
+ */
+function remove_query_arg( $key, $query=false ) {
+	if ( is_array( $key ) ) { // removing multiple keys
+		foreach ( $key as $k )
+			$query = add_query_arg( $k, false, $query );
+		return $query;
+	}
+	return add_query_arg( $key, false, $query );
+}
+
+/**
+ * Walks the array while sanitizing the contents.
+ *
+ * @since 0.71
+ *
+ * @param array $array Array to walk while sanitizing contents.
+ * @return array Sanitized $array.
+ */
+function add_magic_quotes( $array ) {
+	foreach ( (array) $array as $k => $v ) {
+		if ( is_array( $v ) ) {
+			$array[$k] = add_magic_quotes( $v );
+		} else {
+			$array[$k] = addslashes( $v );
+		}
 	}
-	return apply_filters('all_options', $all_options);
+	return $array;
 }
 
-function update_option($option_name, $newvalue) {
-	global $wpdb;
+/**
+ * HTTP request for URI to retrieve content.
+ *
+ * @since 1.5.1
+ * @uses wp_remote_get()
+ *
+ * @param string $uri URI/URL of web page to retrieve.
+ * @return bool|string HTTP content. False on failure.
+ */
+function wp_remote_fopen( $uri ) {
+	$parsed_url = @parse_url( $uri );
+
+	if ( !$parsed_url || !is_array( $parsed_url ) )
+		return false;
+
+	$options = array();
+	$options['timeout'] = 10;
 
-	if ( is_string($newvalue) )
-		$newvalue = trim($newvalue);
+	$response = wp_safe_remote_get( $uri, $options );
 
-	// If the new and old values are the same, no need to update.
-	$oldvalue = get_option($option_name);
-	if ( $newvalue == $oldvalue ) {
+	if ( is_wp_error( $response ) )
 		return false;
-	}
 
-	if ( false === $oldvalue ) {
-		add_option($option_name, $newvalue);
-		return true;
-	}
+	return wp_remote_retrieve_body( $response );
+}
+
+/**
+ * Set up the WordPress query.
+ *
+ * @since 2.0.0
+ *
+ * @param string $query_vars Default WP_Query arguments.
+ */
+function wp( $query_vars = '' ) {
+	global $wp, $wp_query, $wp_the_query;
+	$wp->main( $query_vars );
+
+	if ( !isset($wp_the_query) )
+		$wp_the_query = $wp_query;
+}
+
+/**
+ * Retrieve the description for the HTTP status.
+ *
+ * @since 2.3.0
+ *
+ * @param int $code HTTP status code.
+ * @return string Empty string if not found, or description if found.
+ */
+function get_status_header_desc( $code ) {
+	global $wp_header_to_desc;
+
+	$code = absint( $code );
+
+	if ( !isset( $wp_header_to_desc ) ) {
+		$wp_header_to_desc = array(
+			100 => 'Continue',
+			101 => 'Switching Protocols',
+			102 => 'Processing',
+
+			200 => 'OK',
+			201 => 'Created',
+			202 => 'Accepted',
+			203 => 'Non-Authoritative Information',
+			204 => 'No Content',
+			205 => 'Reset Content',
+			206 => 'Partial Content',
+			207 => 'Multi-Status',
+			226 => 'IM Used',
+
+			300 => 'Multiple Choices',
+			301 => 'Moved Permanently',
+			302 => 'Found',
+			303 => 'See Other',
+			304 => 'Not Modified',
+			305 => 'Use Proxy',
+			306 => 'Reserved',
+			307 => 'Temporary Redirect',
+
+			400 => 'Bad Request',
+			401 => 'Unauthorized',
+			402 => 'Payment Required',
+			403 => 'Forbidden',
+			404 => 'Not Found',
+			405 => 'Method Not Allowed',
+			406 => 'Not Acceptable',
+			407 => 'Proxy Authentication Required',
+			408 => 'Request Timeout',
+			409 => 'Conflict',
+			410 => 'Gone',
+			411 => 'Length Required',
+			412 => 'Precondition Failed',
+			413 => 'Request Entity Too Large',
+			414 => 'Request-URI Too Long',
+			415 => 'Unsupported Media Type',
+			416 => 'Requested Range Not Satisfiable',
+			417 => 'Expectation Failed',
+			422 => 'Unprocessable Entity',
+			423 => 'Locked',
+			424 => 'Failed Dependency',
+			426 => 'Upgrade Required',
+
+			500 => 'Internal Server Error',
+			501 => 'Not Implemented',
+			502 => 'Bad Gateway',
+			503 => 'Service Unavailable',
+			504 => 'Gateway Timeout',
+			505 => 'HTTP Version Not Supported',
+			506 => 'Variant Also Negotiates',
+			507 => 'Insufficient Storage',
+			510 => 'Not Extended'
+		);
+	}
+
+	if ( isset( $wp_header_to_desc[$code] ) )
+		return $wp_header_to_desc[$code];
+	else
+		return '';
+}
+
+/**
+ * Set HTTP status header.
+ *
+ * @since 2.0.0
+ * @uses apply_filters() Calls 'status_header' on status header string, HTTP
+ *		HTTP code, HTTP code description, and protocol string as separate
+ *		parameters.
+ *
+ * @param int $header HTTP status code
+ * @return unknown
+ */
+function status_header( $header ) {
+	$text = get_status_header_desc( $header );
 
-	if ( is_array($newvalue) || is_object($newvalue) )
-		$newvalue = serialize($newvalue);
+	if ( empty( $text ) )
+		return false;
 
-	wp_cache_set($option_name, $newvalue, 'options');
+	$protocol = $_SERVER["SERVER_PROTOCOL"];
+	if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
+		$protocol = 'HTTP/1.0';
+	$status_header = "$protocol $header $text";
+	if ( function_exists( 'apply_filters' ) )
+		$status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol );
+
+	return @header( $status_header, true, $header );
+}
+
+/**
+ * Gets the header information to prevent caching.
+ *
+ * The several different headers cover the different ways cache prevention is handled
+ * by different browsers
+ *
+ * @since 2.8.0
+ *
+ * @uses apply_filters()
+ * @return array The associative array of header names and field values.
+ */
+function wp_get_nocache_headers() {
+	$headers = array(
+		'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
+		'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
+		'Pragma' => 'no-cache',
+	);
 
-	$newvalue = $wpdb->escape($newvalue);
-	$option_name = $wpdb->escape($option_name);
-	$wpdb->query("UPDATE $wpdb->options SET option_value = '$newvalue' WHERE option_name = '$option_name'");
-	if ( $wpdb->rows_affected == 1 ) {
-		do_action("update_option_{$option_name}", $oldvalue, $newvalue);
-		return true;
+	if ( function_exists('apply_filters') ) {
+		$headers = (array) apply_filters('nocache_headers', $headers);
 	}
-	return false;
-}
-
-function update_user_option( $user_id, $option_name, $newvalue, $global = false ) {
-	global $wpdb;
-	if ( !$global )
-		$option_name = $wpdb->prefix . $option_name;
-	return update_usermeta( $user_id, $option_name, $newvalue );
+	$headers['Last-Modified'] = false;
+	return $headers;
 }
 
-// thx Alex Stapleton, http://alex.vort-x.net/blog/
-function add_option($name, $value = '', $description = '', $autoload = 'yes') {
-	global $wpdb;
-
-	// Make sure the option doesn't already exist
-	if ( false !== get_option($name) )
-		return;
+/**
+ * Sets the headers to prevent caching for the different browsers.
+ *
+ * Different browsers support different nocache headers, so several headers must
+ * be sent so that all of them get the point that no caching should occur.
+ *
+ * @since 2.0.0
+ * @uses wp_get_nocache_headers()
+ */
+function nocache_headers() {
+	$headers = wp_get_nocache_headers();
 
-	if ( is_array($value) || is_object($value) )
-		$value = serialize($value);
+	unset( $headers['Last-Modified'] );
 
-	wp_cache_set($name, $value, 'options');
+	// In PHP 5.3+, make sure we are not sending a Last-Modified header.
+	if ( function_exists( 'header_remove' ) ) {
+		@header_remove( 'Last-Modified' );
+	} else {
+		// In PHP 5.2, send an empty Last-Modified header, but only as a
+		// last resort to override a header already sent. #WP23021
+		foreach ( headers_list() as $header ) {
+			if ( 0 === stripos( $header, 'Last-Modified' ) ) {
+				$headers['Last-Modified'] = '';
+				break;
+			}
+		}
+	}
 
-	$name = $wpdb->escape($name);
-	$value = $wpdb->escape($value);
-	$description = $wpdb->escape($description);
-	$wpdb->query("INSERT INTO $wpdb->options (option_name, option_value, option_description, autoload) VALUES ('$name', '$value', '$description', '$autoload')");
+	foreach( $headers as $name => $field_value )
+		@header("{$name}: {$field_value}");
+}
 
-	return;
+/**
+ * Set the headers for caching for 10 days with JavaScript content type.
+ *
+ * @since 2.1.0
+ */
+function cache_javascript_headers() {
+	$expiresOffset = 10 * DAY_IN_SECONDS;
+	header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );
+	header( "Vary: Accept-Encoding" ); // Handle proxies
+	header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
 }
 
-function delete_option($name) {
+/**
+ * Retrieve the number of database queries during the WordPress execution.
+ *
+ * @since 2.0.0
+ *
+ * @return int Number of database queries
+ */
+function get_num_queries() {
 	global $wpdb;
-	// Get the ID, if no ID then return
-	$option_id = $wpdb->get_var("SELECT option_id FROM $wpdb->options WHERE option_name = '$name'");
-	if ( !$option_id ) return false;
-	$wpdb->query("DELETE FROM $wpdb->options WHERE option_name = '$name'");
-	wp_cache_delete($name, 'options');
-	return true;
+	return $wpdb->num_queries;
 }
 
-function add_post_meta($post_id, $key, $value, $unique = false) {
-	global $wpdb, $post_meta_cache;
+/**
+ * Whether input is yes or no. Must be 'y' to be true.
+ *
+ * @since 1.0.0
+ *
+ * @param string $yn Character string containing either 'y' or 'n'
+ * @return bool True if yes, false on anything else
+ */
+function bool_from_yn( $yn ) {
+	return ( strtolower( $yn ) == 'y' );
+}
+
+/**
+ * Loads the feed template from the use of an action hook.
+ *
+ * If the feed action does not have a hook, then the function will die with a
+ * message telling the visitor that the feed is not valid.
+ *
+ * It is better to only have one hook for each feed.
+ *
+ * @since 2.1.0
+ * @uses $wp_query Used to tell if the use a comment feed.
+ * @uses do_action() Calls 'do_feed_$feed' hook, if a hook exists for the feed.
+ */
+function do_feed() {
+	global $wp_query;
 
-	if ( $unique ) {
-		if ( $wpdb->get_var("SELECT meta_key FROM $wpdb->postmeta WHERE meta_key
-= '$key' AND post_id = '$post_id'") ) {
-			return false;
-		}
-	}
+	$feed = get_query_var( 'feed' );
 
-	$original = $value;
-	if ( is_array($value) || is_object($value) )
-		$value = $wpdb->escape(serialize($value));
+	// Remove the pad, if present.
+	$feed = preg_replace( '/^_+/', '', $feed );
 
-	$wpdb->query("INSERT INTO $wpdb->postmeta (post_id,meta_key,meta_value) VALUES ('$post_id','$key','$value')");
+	if ( $feed == '' || $feed == 'feed' )
+		$feed = get_default_feed();
 
-	$post_meta_cache['$post_id'][$key][] = $original;
+	$hook = 'do_feed_' . $feed;
+	if ( !has_action($hook) ) {
+		$message = sprintf( __( 'ERROR: %s is not a valid feed template.' ), esc_html($feed));
+		wp_die( $message, '', array( 'response' => 404 ) );
+	}
 
-	return true;
+	do_action( $hook, $wp_query->is_comment_feed );
 }
 
-function delete_post_meta($post_id, $key, $value = '') {
-	global $wpdb, $post_meta_cache;
-
-	if ( empty($value) ) {
-		$meta_id = $wpdb->get_var("SELECT meta_id FROM $wpdb->postmeta WHERE
-post_id = '$post_id' AND meta_key = '$key'");
-	} else {
-		$meta_id = $wpdb->get_var("SELECT meta_id FROM $wpdb->postmeta WHERE
-post_id = '$post_id' AND meta_key = '$key' AND meta_value = '$value'");
-	}
+/**
+ * Load the RDF RSS 0.91 Feed template.
+ *
+ * @since 2.1.0
+ */
+function do_feed_rdf() {
+	load_template( ABSPATH . WPINC . '/feed-rdf.php' );
+}
 
-	if ( !$meta_id )
-		return false;
+/**
+ * Load the RSS 1.0 Feed Template.
+ *
+ * @since 2.1.0
+ */
+function do_feed_rss() {
+	load_template( ABSPATH . WPINC . '/feed-rss.php' );
+}
 
-	if ( empty($value) ) {
-		$wpdb->query("DELETE FROM $wpdb->postmeta WHERE post_id = '$post_id'
-AND meta_key = '$key'");
-		unset($post_meta_cache['$post_id'][$key]);
+/**
+ * Load either the RSS2 comment feed or the RSS2 posts feed.
+ *
+ * @since 2.1.0
+ *
+ * @param bool $for_comments True for the comment feed, false for normal feed.
+ */
+function do_feed_rss2( $for_comments ) {
+	if ( $for_comments )
+		load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );
+	else
+		load_template( ABSPATH . WPINC . '/feed-rss2.php' );
+}
+
+/**
+ * Load either Atom comment feed or Atom posts feed.
+ *
+ * @since 2.1.0
+ *
+ * @param bool $for_comments True for the comment feed, false for normal feed.
+ */
+function do_feed_atom( $for_comments ) {
+	if ($for_comments)
+		load_template( ABSPATH . WPINC . '/feed-atom-comments.php');
+	else
+		load_template( ABSPATH . WPINC . '/feed-atom.php' );
+}
+
+/**
+ * Display the robots.txt file content.
+ *
+ * The echo content should be with usage of the permalinks or for creating the
+ * robots.txt file.
+ *
+ * @since 2.1.0
+ * @uses do_action() Calls 'do_robotstxt' hook for displaying robots.txt rules.
+ */
+function do_robots() {
+	header( 'Content-Type: text/plain; charset=utf-8' );
+
+	do_action( 'do_robotstxt' );
+
+	$output = "User-agent: *\n";
+	$public = get_option( 'blog_public' );
+	if ( '0' == $public ) {
+		$output .= "Disallow: /\n";
 	} else {
-		$wpdb->query("DELETE FROM $wpdb->postmeta WHERE post_id = '$post_id'
-AND meta_key = '$key' AND meta_value = '$value'");
-		$cache_key = $post_meta_cache['$post_id'][$key];
-		if ($cache_key) foreach ( $cache_key as $index => $data )
-			if ( $data == $value )
-				unset($post_meta_cache['$post_id'][$key][$index]);
-	}
-
-	unset($post_meta_cache['$post_id'][$key]);
-
-	return true;
-}
+		$site_url = parse_url( site_url() );
+		$path = ( !empty( $site_url['path'] ) ) ? $site_url['path'] : '';
+		$output .= "Disallow: $path/wp-admin/\n";
+		$output .= "Disallow: $path/wp-includes/\n";
+	}
+
+	echo apply_filters('robots_txt', $output, $public);
+}
+
+/**
+ * Test whether blog is already installed.
+ *
+ * The cache will be checked first. If you have a cache plugin, which saves the
+ * cache values, then this will work. If you use the default WordPress cache,
+ * and the database goes away, then you might have problems.
+ *
+ * Checks for the option siteurl for whether WordPress is installed.
+ *
+ * @since 2.1.0
+ * @uses $wpdb
+ *
+ * @return bool Whether blog is already installed.
+ */
+function is_blog_installed() {
+	global $wpdb;
 
-function get_post_meta($post_id, $key, $single = false) {
-	global $wpdb, $post_meta_cache;
+	// Check cache first. If options table goes away and we have true cached, oh well.
+	if ( wp_cache_get( 'is_blog_installed' ) )
+		return true;
 
-	if ( isset($post_meta_cache[$post_id][$key]) ) {
-		if ( $single ) {
-			return maybe_unserialize( $post_meta_cache[$post_id][$key][0] );
-		} else {
-			return maybe_unserialize( $post_meta_cache[$post_id][$key] );
-		}
+	$suppress = $wpdb->suppress_errors();
+	if ( ! defined( 'WP_INSTALLING' ) ) {
+		$alloptions = wp_load_alloptions();
 	}
+	// If siteurl is not set to autoload, check it specifically
+	if ( !isset( $alloptions['siteurl'] ) )
+		$installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
+	else
+		$installed = $alloptions['siteurl'];
+	$wpdb->suppress_errors( $suppress );
 
-	$metalist = $wpdb->get_results("SELECT meta_value FROM $wpdb->postmeta WHERE post_id = '$post_id' AND meta_key = '$key'", ARRAY_N);
+	$installed = !empty( $installed );
+	wp_cache_set( 'is_blog_installed', $installed );
 
-	$values = array();
-	if ( $metalist ) {
-		foreach ($metalist as $metarow) {
-			$values[] = $metarow[0];
-		}
-	}
+	if ( $installed )
+		return true;
 
-	if ( $single ) {
-		if ( count($values) ) {
-			$return = maybe_unserialize( $values[0] );
-		} else {
-			return '';
-		}
-	} else {
-		$return = $values;
-	}
+	// If visiting repair.php, return true and let it take over.
+	if ( defined( 'WP_REPAIRING' ) )
+		return true;
 
-	return maybe_unserialize($return);
-}
+	$suppress = $wpdb->suppress_errors();
 
-function update_post_meta($post_id, $key, $value, $prev_value = '') {
-	global $wpdb, $post_meta_cache;
+	// Loop over the WP tables. If none exist, then scratch install is allowed.
+	// If one or more exist, suggest table repair since we got here because the options
+	// table could not be accessed.
+	$wp_tables = $wpdb->tables();
+	foreach ( $wp_tables as $table ) {
+		// The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
+		if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
+			continue;
+		if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
+			continue;
 
-	$original_value = $value;
-	if ( is_array($value) || is_object($value) )
-		$value = $wpdb->escape(serialize($value));
+		if ( ! $wpdb->get_results( "DESCRIBE $table;" ) )
+			continue;
 
-	$original_prev = $prev_value;
-	if ( is_array($prev_value) || is_object($prev_value) )
-		$prev_value = $wpdb->escape(serialize($prev_value));
+		// One or more tables exist. We are insane.
 
-	if (! $wpdb->get_var("SELECT meta_key FROM $wpdb->postmeta WHERE meta_key
-= '$key' AND post_id = '$post_id'") ) {
-		return false;
-	}
+		wp_load_translations_early();
 
-	if ( empty($prev_value) ) {
-		$wpdb->query("UPDATE $wpdb->postmeta SET meta_value = '$value' WHERE
-meta_key = '$key' AND post_id = '$post_id'");
-		$cache_key = $post_meta_cache['$post_id'][$key];
-		if ( !empty($cache_key) )
-			foreach ($cache_key as $index => $data)
-				$post_meta_cache['$post_id'][$key][$index] = $original_value;
-	} else {
-		$wpdb->query("UPDATE $wpdb->postmeta SET meta_value = '$value' WHERE
-meta_key = '$key' AND post_id = '$post_id' AND meta_value = '$prev_value'");
-		$cache_key = $post_meta_cache['$post_id'][$key];
-		if ( !empty($cache_key) )
-			foreach ($cache_key as $index => $data)
-				if ( $data == $original_prev )
-					$post_meta_cache['$post_id'][$key][$index] = $original_value;
+		// Die with a DB error.
+		$wpdb->error = sprintf( __( 'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.' ), 'maint/repair.php?referrer=is_blog_installed' );
+		dead_db();
 	}
 
-	return true;
+	$wpdb->suppress_errors( $suppress );
+
+	wp_cache_set( 'is_blog_installed', false );
+
+	return false;
 }
 
-// Deprecated.  Use get_post().
-function get_postdata($postid) {
-	$post = &get_post($postid);
-
-	$postdata = array (
-		'ID' => $post->ID,
-		'Author_ID' => $post->post_author,
-		'Date' => $post->post_date,
-		'Content' => $post->post_content,
-		'Excerpt' => $post->post_excerpt,
-		'Title' => $post->post_title,
-		'Category' => $post->post_category,
-		'post_status' => $post->post_status,
-		'comment_status' => $post->comment_status,
-		'ping_status' => $post->ping_status,
-		'post_password' => $post->post_password,
-		'to_ping' => $post->to_ping,
-		'pinged' => $post->pinged,
-		'post_name' => $post->post_name
-	);
+/**
+ * Retrieve URL with nonce added to URL query.
+ *
+ * @package WordPress
+ * @subpackage Security
+ * @since 2.0.4
+ *
+ * @param string $actionurl URL to add nonce action.
+ * @param string $action Optional. Nonce action name.
+ * @param string $name Optional. Nonce name.
+ * @return string URL with nonce action added.
+ */
+function wp_nonce_url( $actionurl, $action = -1, $name = '_wpnonce' ) {
+	$actionurl = str_replace( '&amp;', '&', $actionurl );
+	return esc_html( add_query_arg( $name, wp_create_nonce( $action ), $actionurl ) );
+}
+
+/**
+ * Retrieve or display nonce hidden field for forms.
+ *
+ * The nonce field is used to validate that the contents of the form came from
+ * the location on the current site and not somewhere else. The nonce does not
+ * offer absolute protection, but should protect against most cases. It is very
+ * important to use nonce field in forms.
+ *
+ * The $action and $name are optional, but if you want to have better security,
+ * it is strongly suggested to set those two parameters. It is easier to just
+ * call the function without any parameters, because validation of the nonce
+ * doesn't require any parameters, but since crackers know what the default is
+ * it won't be difficult for them to find a way around your nonce and cause
+ * damage.
+ *
+ * The input name will be whatever $name value you gave. The input value will be
+ * the nonce creation value.
+ *
+ * @package WordPress
+ * @subpackage Security
+ * @since 2.0.4
+ *
+ * @param string $action Optional. Action name.
+ * @param string $name Optional. Nonce name.
+ * @param bool $referer Optional, default true. Whether to set the referer field for validation.
+ * @param bool $echo Optional, default true. Whether to display or return hidden form field.
+ * @return string Nonce field.
+ */
+function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
+	$name = esc_attr( $name );
+	$nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
+
+	if ( $referer )
+		$nonce_field .= wp_referer_field( false );
+
+	if ( $echo )
+		echo $nonce_field;
+
+	return $nonce_field;
+}
+
+/**
+ * Retrieve or display referer hidden field for forms.
+ *
+ * The referer link is the current Request URI from the server super global. The
+ * input name is '_wp_http_referer', in case you wanted to check manually.
+ *
+ * @package WordPress
+ * @subpackage Security
+ * @since 2.0.4
+ *
+ * @param bool $echo Whether to echo or return the referer field.
+ * @return string Referer field.
+ */
+function wp_referer_field( $echo = true ) {
+	$referer_field = '<input type="hidden" name="_wp_http_referer" value="'. esc_attr( wp_unslash( $_SERVER['REQUEST_URI'] ) ) . '" />';
+
+	if ( $echo )
+		echo $referer_field;
+	return $referer_field;
+}
+
+/**
+ * Retrieve or display original referer hidden field for forms.
+ *
+ * The input name is '_wp_original_http_referer' and will be either the same
+ * value of {@link wp_referer_field()}, if that was posted already or it will
+ * be the current page, if it doesn't exist.
+ *
+ * @package WordPress
+ * @subpackage Security
+ * @since 2.0.4
+ *
+ * @param bool $echo Whether to echo the original http referer
+ * @param string $jump_back_to Optional, default is 'current'. Can be 'previous' or page you want to jump back to.
+ * @return string Original referer field.
+ */
+function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {
+	if ( ! $ref = wp_get_original_referer() ) {
+		$ref = 'previous' == $jump_back_to ? wp_get_referer() : wp_unslash( $_SERVER['REQUEST_URI'] );
+	}
+	$orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( $ref ) . '" />';
+	if ( $echo )
+		echo $orig_referer_field;
+	return $orig_referer_field;
+}
+
+/**
+ * Retrieve referer from '_wp_http_referer' or HTTP referer. If it's the same
+ * as the current request URL, will return false.
+ *
+ * @package WordPress
+ * @subpackage Security
+ * @since 2.0.4
+ *
+ * @return string|bool False on failure. Referer URL on success.
+ */
+function wp_get_referer() {
+	$ref = false;
+	if ( ! empty( $_REQUEST['_wp_http_referer'] ) )
+		$ref = wp_unslash( $_REQUEST['_wp_http_referer'] );
+	else if ( ! empty( $_SERVER['HTTP_REFERER'] ) )
+		$ref = wp_unslash( $_SERVER['HTTP_REFERER'] );
+
+	if ( $ref && $ref !== wp_unslash( $_SERVER['REQUEST_URI'] ) )
+		return wp_validate_redirect( $ref, false );
+	return false;
+}
 
-	return $postdata;
+/**
+ * Retrieve original referer that was posted, if it exists.
+ *
+ * @package WordPress
+ * @subpackage Security
+ * @since 2.0.4
+ *
+ * @return string|bool False if no original referer or original referer if set.
+ */
+function wp_get_original_referer() {
+	if ( !empty( $_REQUEST['_wp_original_http_referer'] ) )
+		return wp_validate_redirect( wp_unslash( $_REQUEST['_wp_original_http_referer'] ), false );
+	return false;
 }
 
-// Retrieves post data given a post ID or post object.
-// Handles post caching.
-function &get_post(&$post, $output = OBJECT) {
-	global $post_cache, $wpdb;
+/**
+ * Recursive directory creation based on full path.
+ *
+ * Will attempt to set permissions on folders.
+ *
+ * @since 2.0.1
+ *
+ * @param string $target Full path to attempt to create.
+ * @return bool Whether the path was created. True if path already exists.
+ */
+function wp_mkdir_p( $target ) {
+	$wrapper = null;
 
-	if ( empty($post) ) {
-		if ( isset($GLOBALS['post']) )
-			$_post = & $GLOBALS['post'];
-		else
-			$_post = null;
-	} elseif ( is_object($post) ) {
-		if ( 'static' == $post->post_status )
-			return get_page($post, $output);
-		if ( !isset($post_cache[$post->ID]) )
-			$post_cache[$post->ID] = &$post;
-		$_post = & $post_cache[$post->ID];
-	} else {
-		if ( $_post = wp_cache_get($post, 'pages') )
-			return get_page($_post, $output);
-		elseif ( isset($post_cache[$post]) )
-			$_post = & $post_cache[$post];
-		else {
-			$query = "SELECT * FROM $wpdb->posts WHERE ID = '$post' LIMIT 1";
-			$_post = & $wpdb->get_row($query);
-			if ( 'static' == $_post->post_status )
-				return get_page($_post, $output);
-			$post_cache[$post] = & $_post;
-		}
+	// strip the protocol
+	if( wp_is_stream( $target ) ) {
+		list( $wrapper, $target ) = explode( '://', $target, 2 );
 	}
 
-	if ( defined(WP_IMPORTING) )
-		unset($post_cache);
+	// from php.net/mkdir user contributed notes
+	$target = str_replace( '//', '/', $target );
 
-	if ( $output == OBJECT ) {
-		return $_post;
-	} elseif ( $output == ARRAY_A ) {
-		return get_object_vars($_post);
-	} elseif ( $output == ARRAY_N ) {
-		return array_values(get_object_vars($_post));
-	} else {
-		return $_post;
+	// put the wrapper back on the target
+	if( $wrapper !== null ) {
+		$target = $wrapper . '://' . $target;
 	}
-}
 
-function &get_children($post = 0, $output = OBJECT) {
-	global $post_cache, $wpdb;
+	// safe mode fails with a trailing slash under certain PHP versions.
+	$target = rtrim($target, '/'); // Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
+	if ( empty($target) )
+		$target = '/';
 
-	if ( empty($post) ) {
-		if ( isset($GLOBALS['post']) )
-			$post_parent = & $GLOBALS['post']->post_parent;
-		else
+	if ( file_exists( $target ) )
+		return @is_dir( $target );
+
+	// Attempting to create the directory may clutter up our display.
+	if ( @mkdir( $target ) ) {
+		$stat = @stat( dirname( $target ) );
+		$dir_perms = $stat['mode'] & 0007777;  // Get the permission bits.
+		@chmod( $target, $dir_perms );
+		return true;
+	} elseif ( is_dir( dirname( $target ) ) ) {
 			return false;
-	} elseif ( is_object($post) ) {
-		$post_parent = $post->post_parent;
-	} else {
-		$post_parent = $post;
 	}
 
-	$post_parent = (int) $post_parent;
+	// If the above failed, attempt to create the parent node, then try again.
+	if ( ( $target != '/' ) && ( wp_mkdir_p( dirname( $target ) ) ) )
+		return wp_mkdir_p( $target );
 
-	$query = "SELECT * FROM $wpdb->posts WHERE post_parent = $post_parent";
+	return false;
+}
 
-	$children = $wpdb->get_results($query);
+/**
+ * Test if a give filesystem path is absolute ('/foo/bar', 'c:\windows').
+ *
+ * @since 2.5.0
+ *
+ * @param string $path File path
+ * @return bool True if path is absolute, false is not absolute.
+ */
+function path_is_absolute( $path ) {
+	// this is definitive if true but fails if $path does not exist or contains a symbolic link
+	if ( realpath($path) == $path )
+		return true;
 
-	if ( $children ) {
-		foreach ( $children as $key => $child ) {
-			$post_cache[$child->ID] =& $children[$key];
-			$kids[$child->ID] =& $children[$key];
-		}
-	} else {
+	if ( strlen($path) == 0 || $path[0] == '.' )
 		return false;
-	}
 
-	if ( $output == OBJECT ) {
-		return $kids;
-	} elseif ( $output == ARRAY_A ) {
-		foreach ( $kids as $kid )
-			$weeuns[$kid->ID] = get_object_vars($kids[$kid->ID]);
-		return $weeuns;
-	} elseif ( $output == ARRAY_N ) {
-		foreach ( $kids as $kid )
-			$babes[$kid->ID] = array_values(get_object_vars($kids[$kid->ID]));
-		return $babes;
+	// windows allows absolute paths like this
+	if ( preg_match('#^[a-zA-Z]:\\\\#', $path) )
+		return true;
+
+	// a path starting with / or \ is absolute; anything else is relative
+	return ( $path[0] == '/' || $path[0] == '\\' );
+}
+
+/**
+ * Join two filesystem paths together (e.g. 'give me $path relative to $base').
+ *
+ * If the $path is absolute, then it the full path is returned.
+ *
+ * @since 2.5.0
+ *
+ * @param string $base
+ * @param string $path
+ * @return string The path with the base or absolute path.
+ */
+function path_join( $base, $path ) {
+	if ( path_is_absolute($path) )
+		return $path;
+
+	return rtrim($base, '/') . '/' . ltrim($path, '/');
+}
+
+/**
+ * Determines a writable directory for temporary files.
+ * Function's preference is the return value of <code>sys_get_temp_dir()</code>,
+ * followed by your PHP temporary upload directory, followed by WP_CONTENT_DIR,
+ * before finally defaulting to /tmp/
+ *
+ * In the event that this function does not find a writable location,
+ * It may be overridden by the <code>WP_TEMP_DIR</code> constant in
+ * your <code>wp-config.php</code> file.
+ *
+ * @since 2.5.0
+ *
+ * @return string Writable temporary directory
+ */
+function get_temp_dir() {
+	static $temp;
+	if ( defined('WP_TEMP_DIR') )
+		return trailingslashit(WP_TEMP_DIR);
+
+	if ( $temp )
+		return trailingslashit( rtrim( $temp, '\\' ) );
+
+	if ( function_exists('sys_get_temp_dir') ) {
+		$temp = sys_get_temp_dir();
+		if ( @is_dir( $temp ) && wp_is_writable( $temp ) )
+			return trailingslashit( rtrim( $temp, '\\' ) );
+	}
+
+	$temp = ini_get('upload_tmp_dir');
+	if ( is_dir( $temp ) && wp_is_writable( $temp ) )
+		return trailingslashit( rtrim( $temp, '\\' ) );
+
+	$temp = WP_CONTENT_DIR . '/';
+	if ( is_dir( $temp ) && wp_is_writable( $temp ) )
+		return $temp;
+
+	$temp = '/tmp/';
+	return $temp;
+}
+
+/**
+ * Determine if a directory is writable.
+ *
+ * This function is used to work around certain ACL issues
+ * in PHP primarily affecting Windows Servers.
+ *
+ * @see win_is_writable()
+ *
+ * @since 3.6.0
+ *
+ * @param string $path
+ * @return bool
+ */
+function wp_is_writable( $path ) {
+	if ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) )
+		return win_is_writable( $path );
+	else
+		return @is_writable( $path );
+}
+
+/**
+ * Workaround for Windows bug in is_writable() function
+ *
+ * PHP has issues with Windows ACL's for determine if a
+ * directory is writable or not, this works around them by
+ * checking the ability to open files rather than relying
+ * upon PHP to interprate the OS ACL.
+ *
+ * @link http://bugs.php.net/bug.php?id=27609
+ * @link http://bugs.php.net/bug.php?id=30931
+ *
+ * @since 2.8.0
+ *
+ * @param string $path
+ * @return bool
+ */
+function win_is_writable( $path ) {
+
+	if ( $path[strlen( $path ) - 1] == '/' ) // if it looks like a directory, check a random file within the directory
+		return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp');
+	else if ( is_dir( $path ) ) // If it's a directory (and not a file) check a random file within the directory
+		return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );
+
+	// check tmp file for read/write capabilities
+	$should_delete_tmp_file = !file_exists( $path );
+	$f = @fopen( $path, 'a' );
+	if ( $f === false )
+		return false;
+	fclose( $f );
+	if ( $should_delete_tmp_file )
+		unlink( $path );
+	return true;
+}
+
+/**
+ * Get an array containing the current upload directory's path and url.
+ *
+ * Checks the 'upload_path' option, which should be from the web root folder,
+ * and if it isn't empty it will be used. If it is empty, then the path will be
+ * 'WP_CONTENT_DIR/uploads'. If the 'UPLOADS' constant is defined, then it will
+ * override the 'upload_path' option and 'WP_CONTENT_DIR/uploads' path.
+ *
+ * The upload URL path is set either by the 'upload_url_path' option or by using
+ * the 'WP_CONTENT_URL' constant and appending '/uploads' to the path.
+ *
+ * If the 'uploads_use_yearmonth_folders' is set to true (checkbox if checked in
+ * the administration settings panel), then the time will be used. The format
+ * will be year first and then month.
+ *
+ * If the path couldn't be created, then an error will be returned with the key
+ * 'error' containing the error message. The error suggests that the parent
+ * directory is not writable by the server.
+ *
+ * On success, the returned array will have many indices:
+ * 'path' - base directory and sub directory or full path to upload directory.
+ * 'url' - base url and sub directory or absolute URL to upload directory.
+ * 'subdir' - sub directory if uploads use year/month folders option is on.
+ * 'basedir' - path without subdir.
+ * 'baseurl' - URL path without subdir.
+ * 'error' - set to false.
+ *
+ * @since 2.0.0
+ * @uses apply_filters() Calls 'upload_dir' on returned array.
+ *
+ * @param string $time Optional. Time formatted in 'yyyy/mm'.
+ * @return array See above for description.
+ */
+function wp_upload_dir( $time = null ) {
+	$siteurl = get_option( 'siteurl' );
+	$upload_path = trim( get_option( 'upload_path' ) );
+
+	if ( empty( $upload_path ) || 'wp-content/uploads' == $upload_path ) {
+		$dir = WP_CONTENT_DIR . '/uploads';
+	} elseif ( 0 !== strpos( $upload_path, ABSPATH ) ) {
+		// $dir is absolute, $upload_path is (maybe) relative to ABSPATH
+		$dir = path_join( ABSPATH, $upload_path );
 	} else {
-		return $kids;
+		$dir = $upload_path;
 	}
-}
 
-function set_page_path($page) {
-	$page->fullpath = '/' . $page->post_name;
-	$path = $page->fullpath;
-	$curpage = $page;
-	while ($curpage->post_parent != 0) {
-		$curpage = get_page($curpage->post_parent);
-		$path = '/' . $curpage->post_name . $path;
+	if ( !$url = get_option( 'upload_url_path' ) ) {
+		if ( empty($upload_path) || ( 'wp-content/uploads' == $upload_path ) || ( $upload_path == $dir ) )
+			$url = WP_CONTENT_URL . '/uploads';
+		else
+			$url = trailingslashit( $siteurl ) . $upload_path;
 	}
-	
-	$page->fullpath = $path;
 
-	return $page;
-}
+	// Obey the value of UPLOADS. This happens as long as ms-files rewriting is disabled.
+	// We also sometimes obey UPLOADS when rewriting is enabled -- see the next block.
+	if ( defined( 'UPLOADS' ) && ! ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) ) {
+		$dir = ABSPATH . UPLOADS;
+		$url = trailingslashit( $siteurl ) . UPLOADS;
+	}
 
-// Retrieves page data given a page ID or page object.
-// Handles page caching.
-function &get_page(&$page, $output = OBJECT) {
-	global $wpdb;
+	// If multisite (and if not the main site in a post-MU network)
+	if ( is_multisite() && ! ( is_main_site() && defined( 'MULTISITE' ) ) ) {
 
-	if ( empty($page) ) {
-		if ( isset($GLOBALS['page']) ) {
-			$_page = & $GLOBALS['page'];
-			wp_cache_add($_page->ID, $_page, 'pages');
-		} else {
-			$_page = null;
+		if ( ! get_site_option( 'ms_files_rewriting' ) ) {
+			// If ms-files rewriting is disabled (networks created post-3.5), it is fairly straightforward:
+			// Append sites/%d if we're not on the main site (for post-MU networks). (The extra directory
+			// prevents a four-digit ID from conflicting with a year-based directory for the main site.
+			// But if a MU-era network has disabled ms-files rewriting manually, they don't need the extra
+			// directory, as they never had wp-content/uploads for the main site.)
+
+			if ( defined( 'MULTISITE' ) )
+				$ms_dir = '/sites/' . get_current_blog_id();
+			else
+				$ms_dir = '/' . get_current_blog_id();
+
+			$dir .= $ms_dir;
+			$url .= $ms_dir;
+
+		} elseif ( defined( 'UPLOADS' ) && ! ms_is_switched() ) {
+			// Handle the old-form ms-files.php rewriting if the network still has that enabled.
+			// When ms-files rewriting is enabled, then we only listen to UPLOADS when:
+			//   1) we are not on the main site in a post-MU network,
+			//      as wp-content/uploads is used there, and
+			//   2) we are not switched, as ms_upload_constants() hardcodes
+			//      these constants to reflect the original blog ID.
+			//
+			// Rather than UPLOADS, we actually use BLOGUPLOADDIR if it is set, as it is absolute.
+			// (And it will be set, see ms_upload_constants().) Otherwise, UPLOADS can be used, as
+			// as it is relative to ABSPATH. For the final piece: when UPLOADS is used with ms-files
+			// rewriting in multisite, the resulting URL is /files. (#WP22702 for background.)
+
+			if ( defined( 'BLOGUPLOADDIR' ) )
+				$dir = untrailingslashit( BLOGUPLOADDIR );
+			else
+				$dir = ABSPATH . UPLOADS;
+			$url = trailingslashit( $siteurl ) . 'files';
 		}
-	} elseif ( is_object($page) ) {
-		if ( 'static' != $page->post_status )
-			return get_post($page, $output);
-		wp_cache_add($page->ID, $page, 'pages');
-		$_page = $page;
+	}
+
+	$basedir = $dir;
+	$baseurl = $url;
+
+	$subdir = '';
+	if ( get_option( 'uploads_use_yearmonth_folders' ) ) {
+		// Generate the yearly and monthly dirs
+		if ( !$time )
+			$time = current_time( 'mysql' );
+		$y = substr( $time, 0, 4 );
+		$m = substr( $time, 5, 2 );
+		$subdir = "/$y/$m";
+	}
+
+	$dir .= $subdir;
+	$url .= $subdir;
+
+	$uploads = apply_filters( 'upload_dir',
+		array(
+			'path'    => $dir,
+			'url'     => $url,
+			'subdir'  => $subdir,
+			'basedir' => $basedir,
+			'baseurl' => $baseurl,
+			'error'   => false,
+		) );
+
+	// Make sure we have an uploads dir
+	if ( ! wp_mkdir_p( $uploads['path'] ) ) {
+		if ( 0 === strpos( $uploads['basedir'], ABSPATH ) )
+			$error_path = str_replace( ABSPATH, '', $uploads['basedir'] ) . $uploads['subdir'];
+		else
+			$error_path = basename( $uploads['basedir'] ) . $uploads['subdir'];
+
+		$message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
+		$uploads['error'] = $message;
+	}
+
+	return $uploads;
+}
+
+/**
+ * Get a filename that is sanitized and unique for the given directory.
+ *
+ * If the filename is not unique, then a number will be added to the filename
+ * before the extension, and will continue adding numbers until the filename is
+ * unique.
+ *
+ * The callback is passed three parameters, the first one is the directory, the
+ * second is the filename, and the third is the extension.
+ *
+ * @since 2.5.0
+ *
+ * @param string $dir
+ * @param string $filename
+ * @param mixed $unique_filename_callback Callback.
+ * @return string New filename, if given wasn't unique.
+ */
+function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
+	// sanitize the file name before we begin processing
+	$filename = sanitize_file_name($filename);
+
+	// separate the filename into a name and extension
+	$info = pathinfo($filename);
+	$ext = !empty($info['extension']) ? '.' . $info['extension'] : '';
+	$name = basename($filename, $ext);
+
+	// edge case: if file is named '.ext', treat as an empty name
+	if ( $name === $ext )
+		$name = '';
+
+	// Increment the file number until we have a unique file to save in $dir. Use callback if supplied.
+	if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
+		$filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
 	} else {
-		if ( isset($GLOBALS['page']) && ($page == $GLOBALS['page']->ID) ) {
-			$_page = & $GLOBALS['page'];
-			wp_cache_add($_page->ID, $_page, 'pages');
-		} elseif ( $_page = $GLOBALS['post_cache'][$page] ) {
-			return get_post($page, $output);
-		} elseif ( $_page = wp_cache_get($page, 'pages') ) {
-			// Got it.
-		} else {
-			$query = "SELECT * FROM $wpdb->posts WHERE ID= '$page' LIMIT 1";
-			$_page = & $wpdb->get_row($query);
-			if ( 'static' != $_page->post_status )
-				return get_post($_page, $output);
-			wp_cache_add($_page->ID, $_page, 'pages');
+		$number = '';
+
+		// change '.ext' to lower case
+		if ( $ext && strtolower($ext) != $ext ) {
+			$ext2 = strtolower($ext);
+			$filename2 = preg_replace( '|' . preg_quote($ext) . '$|', $ext2, $filename );
+
+			// check for both lower and upper case extension or image sub-sizes may be overwritten
+			while ( file_exists($dir . "/$filename") || file_exists($dir . "/$filename2") ) {
+				$new_number = $number + 1;
+				$filename = str_replace( "$number$ext", "$new_number$ext", $filename );
+				$filename2 = str_replace( "$number$ext2", "$new_number$ext2", $filename2 );
+				$number = $new_number;
+			}
+			return $filename2;
+		}
+
+		while ( file_exists( $dir . "/$filename" ) ) {
+			if ( '' == "$number$ext" )
+				$filename = $filename . ++$number . $ext;
+			else
+				$filename = str_replace( "$number$ext", ++$number . $ext, $filename );
+		}
+	}
+
+	return $filename;
+}
+
+/**
+ * Create a file in the upload folder with given content.
+ *
+ * If there is an error, then the key 'error' will exist with the error message.
+ * If success, then the key 'file' will have the unique file path, the 'url' key
+ * will have the link to the new file. and the 'error' key will be set to false.
+ *
+ * This function will not move an uploaded file to the upload folder. It will
+ * create a new file with the content in $bits parameter. If you move the upload
+ * file, read the content of the uploaded file, and then you can give the
+ * filename and content to this function, which will add it to the upload
+ * folder.
+ *
+ * The permissions will be set on the new file automatically by this function.
+ *
+ * @since 2.0.0
+ *
+ * @param string $name
+ * @param null $deprecated Never used. Set to null.
+ * @param mixed $bits File content
+ * @param string $time Optional. Time formatted in 'yyyy/mm'.
+ * @return array
+ */
+function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
+	if ( !empty( $deprecated ) )
+		_deprecated_argument( __FUNCTION__, '2.0' );
+
+	if ( empty( $name ) )
+		return array( 'error' => __( 'Empty filename' ) );
+
+	$wp_filetype = wp_check_filetype( $name );
+	if ( ! $wp_filetype['ext'] && ! current_user_can( 'unfiltered_upload' ) )
+		return array( 'error' => __( 'Invalid file type' ) );
+
+	$upload = wp_upload_dir( $time );
+
+	if ( $upload['error'] !== false )
+		return $upload;
+
+	$upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) );
+	if ( !is_array( $upload_bits_error ) ) {
+		$upload[ 'error' ] = $upload_bits_error;
+		return $upload;
+	}
+
+	$filename = wp_unique_filename( $upload['path'], $name );
+
+	$new_file = $upload['path'] . "/$filename";
+	if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
+		if ( 0 === strpos( $upload['basedir'], ABSPATH ) )
+			$error_path = str_replace( ABSPATH, '', $upload['basedir'] ) . $upload['subdir'];
+		else
+			$error_path = basename( $upload['basedir'] ) . $upload['subdir'];
+
+		$message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
+		return array( 'error' => $message );
+	}
+
+	$ifp = @ fopen( $new_file, 'wb' );
+	if ( ! $ifp )
+		return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) );
+
+	@fwrite( $ifp, $bits );
+	fclose( $ifp );
+	clearstatcache();
+
+	// Set correct file permissions
+	$stat = @ stat( dirname( $new_file ) );
+	$perms = $stat['mode'] & 0007777;
+	$perms = $perms & 0000666;
+	@ chmod( $new_file, $perms );
+	clearstatcache();
+
+	// Compute the URL
+	$url = $upload['url'] . "/$filename";
+
+	return array( 'file' => $new_file, 'url' => $url, 'error' => false );
+}
+
+/**
+ * Retrieve the file type based on the extension name.
+ *
+ * @package WordPress
+ * @since 2.5.0
+ * @uses apply_filters() Calls 'ext2type' hook on default supported types.
+ *
+ * @param string $ext The extension to search.
+ * @return string|null The file type, example: audio, video, document, spreadsheet, etc. Null if not found.
+ */
+function wp_ext2type( $ext ) {
+	$ext2type = apply_filters( 'ext2type', array(
+		'audio'       => array( 'aac', 'ac3',  'aif',  'aiff', 'm3a',  'm4a',   'm4b',  'mka',  'mp1',  'mp2',  'mp3', 'ogg', 'oga', 'ram', 'wav', 'wma' ),
+		'video'       => array( 'asf', 'avi',  'divx', 'dv',   'flv',  'm4v',   'mkv',  'mov',  'mp4',  'mpeg', 'mpg', 'mpv', 'ogm', 'ogv', 'qt',  'rm', 'vob', 'wmv' ),
+		'document'    => array( 'doc', 'docx', 'docm', 'dotm', 'odt',  'pages', 'pdf',  'rtf',  'wp',   'wpd' ),
+		'spreadsheet' => array( 'numbers',     'ods',  'xls',  'xlsx', 'xlsm',  'xlsb' ),
+		'interactive' => array( 'swf', 'key',  'ppt',  'pptx', 'pptm', 'pps',   'ppsx', 'ppsm', 'sldx', 'sldm', 'odp' ),
+		'text'        => array( 'asc', 'csv',  'tsv',  'txt' ),
+		'archive'     => array( 'bz2', 'cab',  'dmg',  'gz',   'rar',  'sea',   'sit',  'sqx',  'tar',  'tgz',  'zip', '7z' ),
+		'code'        => array( 'css', 'htm',  'html', 'php',  'js' ),
+	));
+	foreach ( $ext2type as $type => $exts )
+		if ( in_array( $ext, $exts ) )
+			return $type;
+}
+
+/**
+ * Retrieve the file type from the file name.
+ *
+ * You can optionally define the mime array, if needed.
+ *
+ * @since 2.0.4
+ *
+ * @param string $filename File name or path.
+ * @param array $mimes Optional. Key is the file extension with value as the mime type.
+ * @return array Values with extension first and mime type.
+ */
+function wp_check_filetype( $filename, $mimes = null ) {
+	if ( empty($mimes) )
+		$mimes = get_allowed_mime_types();
+	$type = false;
+	$ext = false;
+
+	foreach ( $mimes as $ext_preg => $mime_match ) {
+		$ext_preg = '!\.(' . $ext_preg . ')$!i';
+		if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
+			$type = $mime_match;
+			$ext = $ext_matches[1];
+			break;
 		}
 	}
-	
-	if (!isset($_page->fullpath)) {
-		$_page = set_page_path($_page);
-		wp_cache_replace($_page->cat_ID, $_page, 'pages');
+
+	return compact( 'ext', 'type' );
+}
+
+/**
+ * Attempt to determine the real file type of a file.
+ * If unable to, the file name extension will be used to determine type.
+ *
+ * If it's determined that the extension does not match the file's real type,
+ * then the "proper_filename" value will be set with a proper filename and extension.
+ *
+ * Currently this function only supports validating images known to getimagesize().
+ *
+ * @since 3.0.0
+ *
+ * @param string $file Full path to the image.
+ * @param string $filename The filename of the image (may differ from $file due to $file being in a tmp directory)
+ * @param array $mimes Optional. Key is the file extension with value as the mime type.
+ * @return array Values for the extension, MIME, and either a corrected filename or false if original $filename is valid
+ */
+function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
+
+	$proper_filename = false;
+
+	// Do basic extension validation and MIME mapping
+	$wp_filetype = wp_check_filetype( $filename, $mimes );
+	extract( $wp_filetype );
+
+	// We can't do any further validation without a file to work with
+	if ( ! file_exists( $file ) )
+		return compact( 'ext', 'type', 'proper_filename' );
+
+	// We're able to validate images using GD
+	if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
+
+		// Attempt to figure out what type of image it actually is
+		$imgstats = @getimagesize( $file );
+
+		// If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
+		if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
+			// This is a simplified array of MIMEs that getimagesize() can detect and their extensions
+			// You shouldn't need to use this filter, but it's here just in case
+			$mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(
+				'image/jpeg' => 'jpg',
+				'image/png'  => 'png',
+				'image/gif'  => 'gif',
+				'image/bmp'  => 'bmp',
+				'image/tiff' => 'tif',
+			) );
+
+			// Replace whatever is after the last period in the filename with the correct extension
+			if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
+				$filename_parts = explode( '.', $filename );
+				array_pop( $filename_parts );
+				$filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
+				$new_filename = implode( '.', $filename_parts );
+
+				if ( $new_filename != $filename )
+					$proper_filename = $new_filename; // Mark that it changed
+
+				// Redefine the extension / MIME
+				$wp_filetype = wp_check_filetype( $new_filename, $mimes );
+				extract( $wp_filetype );
+			}
+		}
 	}
 
-	if ( $output == OBJECT ) {
-		return $_page;
-	} elseif ( $output == ARRAY_A ) {
-		return get_object_vars($_page);
-	} elseif ( $output == ARRAY_N ) {
-		return array_values(get_object_vars($_page));
+	// Let plugins try and validate other types of files
+	// Should return an array in the style of array( 'ext' => $ext, 'type' => $type, 'proper_filename' => $proper_filename )
+	return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
+}
+
+/**
+ * Retrieve list of mime types and file extensions.
+ *
+ * @since 3.5.0
+ *
+ * @uses apply_filters() Calls 'mime_types' on returned array. This filter should
+ * be used to add types, not remove them. To remove types use the upload_mimes filter.
+ *
+ * @return array Array of mime types keyed by the file extension regex corresponding to those types.
+ */
+function wp_get_mime_types() {
+	// Accepted MIME types are set here as PCRE unless provided.
+	return apply_filters( 'mime_types', array(
+	// Image formats
+	'jpg|jpeg|jpe' => 'image/jpeg',
+	'gif' => 'image/gif',
+	'png' => 'image/png',
+	'bmp' => 'image/bmp',
+	'tif|tiff' => 'image/tiff',
+	'ico' => 'image/x-icon',
+	// Video formats
+	'asf|asx' => 'video/x-ms-asf',
+	'wmv' => 'video/x-ms-wmv',
+	'wmx' => 'video/x-ms-wmx',
+	'wm' => 'video/x-ms-wm',
+	'avi' => 'video/avi',
+	'divx' => 'video/divx',
+	'flv' => 'video/x-flv',
+	'mov|qt' => 'video/quicktime',
+	'mpeg|mpg|mpe' => 'video/mpeg',
+	'mp4|m4v' => 'video/mp4',
+	'ogv' => 'video/ogg',
+	'webm' => 'video/webm',
+	'mkv' => 'video/x-matroska',
+	// Text formats
+	'txt|asc|c|cc|h' => 'text/plain',
+	'csv' => 'text/csv',
+	'tsv' => 'text/tab-separated-values',
+	'ics' => 'text/calendar',
+	'rtx' => 'text/richtext',
+	'css' => 'text/css',
+	'htm|html' => 'text/html',
+	// Audio formats
+	'mp3|m4a|m4b' => 'audio/mpeg',
+	'ra|ram' => 'audio/x-realaudio',
+	'wav' => 'audio/wav',
+	'ogg|oga' => 'audio/ogg',
+	'mid|midi' => 'audio/midi',
+	'wma' => 'audio/x-ms-wma',
+	'wax' => 'audio/x-ms-wax',
+	'mka' => 'audio/x-matroska',
+	// Misc application formats
+	'rtf' => 'application/rtf',
+	'js' => 'application/javascript',
+	'pdf' => 'application/pdf',
+	'swf' => 'application/x-shockwave-flash',
+	'class' => 'application/java',
+	'tar' => 'application/x-tar',
+	'zip' => 'application/zip',
+	'gz|gzip' => 'application/x-gzip',
+	'rar' => 'application/rar',
+	'7z' => 'application/x-7z-compressed',
+	'exe' => 'application/x-msdownload',
+	// MS Office formats
+	'doc' => 'application/msword',
+	'pot|pps|ppt' => 'application/vnd.ms-powerpoint',
+	'wri' => 'application/vnd.ms-write',
+	'xla|xls|xlt|xlw' => 'application/vnd.ms-excel',
+	'mdb' => 'application/vnd.ms-access',
+	'mpp' => 'application/vnd.ms-project',
+	'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+	'docm' => 'application/vnd.ms-word.document.macroEnabled.12',
+	'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
+	'dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
+	'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+	'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
+	'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
+	'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
+	'xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
+	'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
+	'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+	'pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
+	'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
+	'ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
+	'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
+	'potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
+	'ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
+	'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
+	'sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
+	'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
+	// OpenOffice formats
+	'odt' => 'application/vnd.oasis.opendocument.text',
+	'odp' => 'application/vnd.oasis.opendocument.presentation',
+	'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
+	'odg' => 'application/vnd.oasis.opendocument.graphics',
+	'odc' => 'application/vnd.oasis.opendocument.chart',
+	'odb' => 'application/vnd.oasis.opendocument.database',
+	'odf' => 'application/vnd.oasis.opendocument.formula',
+	// WordPerfect formats
+	'wp|wpd' => 'application/wordperfect',
+	// iWork formats
+	'key' => 'application/vnd.apple.keynote',
+	'numbers' => 'application/vnd.apple.numbers',
+	'pages' => 'application/vnd.apple.pages',
+	) );
+}
+/**
+ * Retrieve list of allowed mime types and file extensions.
+ *
+ * @since 2.8.6
+ *
+ * @uses apply_filters() Calls 'upload_mimes' on returned array
+ * @uses wp_get_upload_mime_types() to fetch the list of mime types
+ *
+ * @param int|WP_User $user Optional. User to check. Defaults to current user.
+ * @return array Array of mime types keyed by the file extension regex corresponding to those types.
+ */
+function get_allowed_mime_types( $user = null ) {
+	$t = wp_get_mime_types();
+
+	unset( $t['swf'], $t['exe'] );
+	if ( function_exists( 'current_user_can' ) )
+		$unfiltered = $user ? user_can( $user, 'unfiltered_html' ) : current_user_can( 'unfiltered_html' );
+
+	if ( empty( $unfiltered ) )
+		unset( $t['htm|html'] );
+
+	return apply_filters( 'upload_mimes', $t, $user );
+}
+
+/**
+ * Display "Are You Sure" message to confirm the action being taken.
+ *
+ * If the action has the nonce explain message, then it will be displayed along
+ * with the "Are you sure?" message.
+ *
+ * @package WordPress
+ * @subpackage Security
+ * @since 2.0.4
+ *
+ * @param string $action The nonce action.
+ */
+function wp_nonce_ays( $action ) {
+	$title = __( 'WordPress Failure Notice' );
+	if ( 'log-out' == $action ) {
+		$html = sprintf( __( 'You are attempting to log out of %s' ), get_bloginfo( 'name' ) ) . '</p><p>';
+		$html .= sprintf( __( "Do you really want to <a href='%s'>log out</a>?"), wp_logout_url() );
 	} else {
-		return $_page;
+		$html = __( 'Are you sure you want to do this?' );
+		if ( wp_get_referer() )
+			$html .= "</p><p><a href='" . esc_url( remove_query_arg( 'updated', wp_get_referer() ) ) . "'>" . __( 'Please try again.' ) . "</a>";
+	}
+
+	wp_die( $html, $title, array('response' => 403) );
+}
+
+/**
+ * Kill WordPress execution and display HTML message with error message.
+ *
+ * This function complements the die() PHP function. The difference is that
+ * HTML will be displayed to the user. It is recommended to use this function
+ * only, when the execution should not continue any further. It is not
+ * recommended to call this function very often and try to handle as many errors
+ * as possible silently.
+ *
+ * @since 2.0.4
+ *
+ * @param string $message Error message.
+ * @param string $title Error title.
+ * @param string|array $args Optional arguments to control behavior.
+ */
+function wp_die( $message = '', $title = '', $args = array() ) {
+	if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
+		$function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );
+	elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST )
+		$function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' );
+	else
+		$function = apply_filters( 'wp_die_handler', '_default_wp_die_handler' );
+
+	call_user_func( $function, $message, $title, $args );
+}
+
+/**
+ * Kill WordPress execution and display HTML message with error message.
+ *
+ * This is the default handler for wp_die if you want a custom one for your
+ * site then you can overload using the wp_die_handler filter in wp_die
+ *
+ * @since 3.0.0
+ * @access private
+ *
+ * @param string $message Error message.
+ * @param string $title Error title.
+ * @param string|array $args Optional arguments to control behavior.
+ */
+function _default_wp_die_handler( $message, $title = '', $args = array() ) {
+	$defaults = array( 'response' => 500 );
+	$r = wp_parse_args($args, $defaults);
+
+	$have_gettext = function_exists('__');
+
+	if ( function_exists( 'is_wp_error' ) && is_wp_error( $message ) ) {
+		if ( empty( $title ) ) {
+			$error_data = $message->get_error_data();
+			if ( is_array( $error_data ) && isset( $error_data['title'] ) )
+				$title = $error_data['title'];
+		}
+		$errors = $message->get_error_messages();
+		switch ( count( $errors ) ) :
+		case 0 :
+			$message = '';
+			break;
+		case 1 :
+			$message = "<p>{$errors[0]}</p>";
+			break;
+		default :
+			$message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $errors ) . "</li>\n\t</ul>";
+			break;
+		endswitch;
+	} elseif ( is_string( $message ) ) {
+		$message = "<p>$message</p>";
 	}
-}
 
-function set_category_path($cat) {
-	$cat->fullpath = '/' . $cat->category_nicename;
-	$path = $cat->fullpath;
-	$curcat = $cat;
-	while ($curcat->category_parent != 0) {
-		$curcat = get_category($curcat->category_parent);
-		$path = '/' . $curcat->category_nicename . $path;
+	if ( isset( $r['back_link'] ) && $r['back_link'] ) {
+		$back_text = $have_gettext? __('&laquo; Back') : '&laquo; Back';
+		$message .= "\n<p><a href='javascript:history.back()'>$back_text</a></p>";
 	}
-	
-	$cat->fullpath = $path;
 
-	return $cat;
-}
+	if ( ! did_action( 'admin_head' ) ) :
+		if ( !headers_sent() ) {
+			status_header( $r['response'] );
+			nocache_headers();
+			header( 'Content-Type: text/html; charset=utf-8' );
+		}
 
-// Retrieves category data given a category ID or category object.
-// Handles category caching.
-function &get_category(&$category, $output = OBJECT) {
-	global $wpdb;
+		if ( empty($title) )
+			$title = $have_gettext ? __('WordPress &rsaquo; Error') : 'WordPress &rsaquo; Error';
+
+		$text_direction = 'ltr';
+		if ( isset($r['text_direction']) && 'rtl' == $r['text_direction'] )
+			$text_direction = 'rtl';
+		elseif ( function_exists( 'is_rtl' ) && is_rtl() )
+			$text_direction = 'rtl';
+?>
+<!DOCTYPE html>
+<!-- Ticket #11289, IE bug fix: always pad the error page with enough characters such that it is greater than 512 bytes, even after gzip compression abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono
+-->
+<html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) language_attributes(); else echo "dir='$text_direction'"; ?>>
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<title><?php echo $title ?></title>
+	<style type="text/css">
+		html {
+			background: #f9f9f9;
+		}
+		body {
+			background: #fff;
+			color: #333;
+			font-family: sans-serif;
+			margin: 2em auto;
+			padding: 1em 2em;
+			-webkit-border-radius: 3px;
+			border-radius: 3px;
+			border: 1px solid #dfdfdf;
+			max-width: 700px;
+		}
+		h1 {
+			border-bottom: 1px solid #dadada;
+			clear: both;
+			color: #666;
+			font: 24px Georgia, "Times New Roman", Times, serif;
+			margin: 30px 0 0 0;
+			padding: 0;
+			padding-bottom: 7px;
+		}
+		#error-page {
+			margin-top: 50px;
+		}
+		#error-page p {
+			font-size: 14px;
+			line-height: 1.5;
+			margin: 25px 0 20px;
+		}
+		#error-page code {
+			font-family: Consolas, Monaco, monospace;
+		}
+		ul li {
+			margin-bottom: 10px;
+			font-size: 14px ;
+		}
+		a {
+			color: #21759B;
+			text-decoration: none;
+		}
+		a:hover {
+			color: #D54E21;
+		}
+		.button {
+			display: inline-block;
+			text-decoration: none;
+			font-size: 14px;
+			line-height: 23px;
+			height: 24px;
+			margin: 0;
+			padding: 0 10px 1px;
+			cursor: pointer;
+			border-width: 1px;
+			border-style: solid;
+			-webkit-border-radius: 3px;
+			border-radius: 3px;
+			white-space: nowrap;
+			-webkit-box-sizing: border-box;
+			-moz-box-sizing:    border-box;
+			box-sizing:         border-box;
+			background: #f3f3f3;
+			background-image: -webkit-gradient(linear, left top, left bottom, from(#fefefe), to(#f4f4f4));
+			background-image: -webkit-linear-gradient(top, #fefefe, #f4f4f4);
+			background-image:    -moz-linear-gradient(top, #fefefe, #f4f4f4);
+			background-image:      -o-linear-gradient(top, #fefefe, #f4f4f4);
+			background-image:   linear-gradient(to bottom, #fefefe, #f4f4f4);
+			border-color: #bbb;
+		 	color: #333;
+			text-shadow: 0 1px 0 #fff;
+		}
 
-	if ( empty($category) )
-		return null;
+		.button.button-large {
+			height: 29px;
+			line-height: 28px;
+			padding: 0 12px;
+		}
 
-	if ( is_object($category) ) {
-		wp_cache_add($category->cat_ID, $category, 'category');
-		$_category = $category;
-	} else {
-		if ( ! $_category = wp_cache_get($category, 'category') ) {
-			$_category = $wpdb->get_row("SELECT * FROM $wpdb->categories WHERE cat_ID = '$category' LIMIT 1");
-			wp_cache_add($category, $_category, 'category');
+		.button:hover,
+		.button:focus {
+			background: #f3f3f3;
+			background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#f3f3f3));
+			background-image: -webkit-linear-gradient(top, #fff, #f3f3f3);
+			background-image:    -moz-linear-gradient(top, #fff, #f3f3f3);
+			background-image:     -ms-linear-gradient(top, #fff, #f3f3f3);
+			background-image:      -o-linear-gradient(top, #fff, #f3f3f3);
+			background-image:   linear-gradient(to bottom, #fff, #f3f3f3);
+			border-color: #999;
+			color: #222;
 		}
-	}
 
-	if ( !isset($_category->fullpath) ) {
-		$_category = set_category_path($_category);
-		wp_cache_replace($_category->cat_ID, $_category, 'category');	
-	}
+		.button:focus  {
+			-webkit-box-shadow: 1px 1px 1px rgba(0,0,0,.2);
+			box-shadow: 1px 1px 1px rgba(0,0,0,.2);
+		}
 
-	if ( $output == OBJECT ) {
-		return $_category;
-	} elseif ( $output == ARRAY_A ) {
-		return get_object_vars($_category);
-	} elseif ( $output == ARRAY_N ) {
-		return array_values(get_object_vars($_category));
-	} else {
-		return $_category;
+		.button:active {
+			outline: none;
+			background: #eee;
+			background-image: -webkit-gradient(linear, left top, left bottom, from(#f4f4f4), to(#fefefe));
+			background-image: -webkit-linear-gradient(top, #f4f4f4, #fefefe);
+			background-image:    -moz-linear-gradient(top, #f4f4f4, #fefefe);
+			background-image:     -ms-linear-gradient(top, #f4f4f4, #fefefe);
+			background-image:      -o-linear-gradient(top, #f4f4f4, #fefefe);
+			background-image:   linear-gradient(to bottom, #f4f4f4, #fefefe);
+			border-color: #999;
+			color: #333;
+			text-shadow: 0 -1px 0 #fff;
+			-webkit-box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
+		 	box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
+		}
+
+		<?php if ( 'rtl' == $text_direction ) : ?>
+		body { font-family: Tahoma, Arial; }
+		<?php endif; ?>
+	</style>
+</head>
+<body id="error-page">
+<?php endif; // ! did_action( 'admin_head' ) ?>
+	<?php echo $message; ?>
+</body>
+</html>
+<?php
+	die();
+}
+
+/**
+ * Kill WordPress execution and display XML message with error message.
+ *
+ * This is the handler for wp_die when processing XMLRPC requests.
+ *
+ * @since 3.2.0
+ * @access private
+ *
+ * @param string $message Error message.
+ * @param string $title Error title.
+ * @param string|array $args Optional arguments to control behavior.
+ */
+function _xmlrpc_wp_die_handler( $message, $title = '', $args = array() ) {
+	global $wp_xmlrpc_server;
+	$defaults = array( 'response' => 500 );
+
+	$r = wp_parse_args($args, $defaults);
+
+	if ( $wp_xmlrpc_server ) {
+		$error = new IXR_Error( $r['response'] , $message);
+		$wp_xmlrpc_server->output( $error->getXml() );
+	}
+	die();
+}
+
+/**
+ * Kill WordPress ajax execution.
+ *
+ * This is the handler for wp_die when processing Ajax requests.
+ *
+ * @since 3.4.0
+ * @access private
+ *
+ * @param string $message Optional. Response to print.
+ */
+function _ajax_wp_die_handler( $message = '' ) {
+	if ( is_scalar( $message ) )
+		die( (string) $message );
+	die( '0' );
+}
+
+/**
+ * Kill WordPress execution.
+ *
+ * This is the handler for wp_die when processing APP requests.
+ *
+ * @since 3.4.0
+ * @access private
+ *
+ * @param string $message Optional. Response to print.
+ */
+function _scalar_wp_die_handler( $message = '' ) {
+	if ( is_scalar( $message ) )
+		die( (string) $message );
+	die();
+}
+
+/**
+ * Send a JSON response back to an Ajax request.
+ *
+ * @since 3.5.0
+ *
+ * @param mixed $response Variable (usually an array or object) to encode as JSON, then print and die.
+ */
+function wp_send_json( $response ) {
+	@header( 'Content-Type: application/json; charset=' . get_option( 'blog_charset' ) );
+	echo json_encode( $response );
+	if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
+		wp_die();
+	else
+		die;
+}
+
+/**
+ * Send a JSON response back to an Ajax request, indicating success.
+ *
+ * @since 3.5.0
+ *
+ * @param mixed $data Data to encode as JSON, then print and die.
+ */
+function wp_send_json_success( $data = null ) {
+	$response = array( 'success' => true );
+
+	if ( isset( $data ) )
+		$response['data'] = $data;
+
+	wp_send_json( $response );
+}
+
+/**
+ * Send a JSON response back to an Ajax request, indicating failure.
+ *
+ * @since 3.5.0
+ *
+ * @param mixed $data Data to encode as JSON, then print and die.
+ */
+function wp_send_json_error( $data = null ) {
+	$response = array( 'success' => false );
+
+	if ( isset( $data ) )
+		$response['data'] = $data;
+
+	wp_send_json( $response );
+}
+
+/**
+ * Retrieve the WordPress home page URL.
+ *
+ * If the constant named 'WP_HOME' exists, then it will be used and returned by
+ * the function. This can be used to counter the redirection on your local
+ * development environment.
+ *
+ * @access private
+ * @package WordPress
+ * @since 2.2.0
+ *
+ * @param string $url URL for the home location
+ * @return string Homepage location.
+ */
+function _config_wp_home( $url = '' ) {
+	if ( defined( 'WP_HOME' ) )
+		return untrailingslashit( WP_HOME );
+	return $url;
+}
+
+/**
+ * Retrieve the WordPress site URL.
+ *
+ * If the constant named 'WP_SITEURL' is defined, then the value in that
+ * constant will always be returned. This can be used for debugging a site on
+ * your localhost while not having to change the database to your URL.
+ *
+ * @access private
+ * @package WordPress
+ * @since 2.2.0
+ *
+ * @param string $url URL to set the WordPress site location.
+ * @return string The WordPress Site URL
+ */
+function _config_wp_siteurl( $url = '' ) {
+	if ( defined( 'WP_SITEURL' ) )
+		return untrailingslashit( WP_SITEURL );
+	return $url;
+}
+
+/**
+ * Set the localized direction for MCE plugin.
+ *
+ * Will only set the direction to 'rtl', if the WordPress locale has the text
+ * direction set to 'rtl'.
+ *
+ * Fills in the 'directionality', 'plugins', and 'theme_advanced_button1' array
+ * keys. These keys are then returned in the $input array.
+ *
+ * @access private
+ * @package WordPress
+ * @subpackage MCE
+ * @since 2.1.0
+ *
+ * @param array $input MCE plugin array.
+ * @return array Direction set for 'rtl', if needed by locale.
+ */
+function _mce_set_direction( $input ) {
+	if ( is_rtl() ) {
+		$input['directionality'] = 'rtl';
+		$input['plugins'] .= ',directionality';
+		$input['theme_advanced_buttons1'] .= ',ltr';
+	}
+
+	return $input;
+}
+
+/**
+ * Convert smiley code to the icon graphic file equivalent.
+ *
+ * You can turn off smilies, by going to the write setting screen and unchecking
+ * the box, or by setting 'use_smilies' option to false or removing the option.
+ *
+ * Plugins may override the default smiley list by setting the $wpsmiliestrans
+ * to an array, with the key the code the blogger types in and the value the
+ * image file.
+ *
+ * The $wp_smiliessearch global is for the regular expression and is set each
+ * time the function is called.
+ *
+ * The full list of smilies can be found in the function and won't be listed in
+ * the description. Probably should create a Codex page for it, so that it is
+ * available.
+ *
+ * @global array $wpsmiliestrans
+ * @global array $wp_smiliessearch
+ * @since 2.2.0
+ */
+function smilies_init() {
+	global $wpsmiliestrans, $wp_smiliessearch;
+
+	// don't bother setting up smilies if they are disabled
+	if ( !get_option( 'use_smilies' ) )
+		return;
+
+	if ( !isset( $wpsmiliestrans ) ) {
+		$wpsmiliestrans = array(
+		':mrgreen:' => 'icon_mrgreen.gif',
+		':neutral:' => 'icon_neutral.gif',
+		':twisted:' => 'icon_twisted.gif',
+		  ':arrow:' => 'icon_arrow.gif',
+		  ':shock:' => 'icon_eek.gif',
+		  ':smile:' => 'icon_smile.gif',
+		    ':???:' => 'icon_confused.gif',
+		   ':cool:' => 'icon_cool.gif',
+		   ':evil:' => 'icon_evil.gif',
+		   ':grin:' => 'icon_biggrin.gif',
+		   ':idea:' => 'icon_idea.gif',
+		   ':oops:' => 'icon_redface.gif',
+		   ':razz:' => 'icon_razz.gif',
+		   ':roll:' => 'icon_rolleyes.gif',
+		   ':wink:' => 'icon_wink.gif',
+		    ':cry:' => 'icon_cry.gif',
+		    ':eek:' => 'icon_surprised.gif',
+		    ':lol:' => 'icon_lol.gif',
+		    ':mad:' => 'icon_mad.gif',
+		    ':sad:' => 'icon_sad.gif',
+		      '8-)' => 'icon_cool.gif',
+		      '8-O' => 'icon_eek.gif',
+		      ':-(' => 'icon_sad.gif',
+		      ':-)' => 'icon_smile.gif',
+		      ':-?' => 'icon_confused.gif',
+		      ':-D' => 'icon_biggrin.gif',
+		      ':-P' => 'icon_razz.gif',
+		      ':-o' => 'icon_surprised.gif',
+		      ':-x' => 'icon_mad.gif',
+		      ':-|' => 'icon_neutral.gif',
+		      ';-)' => 'icon_wink.gif',
+		// This one transformation breaks regular text with frequency.
+		//     '8)' => 'icon_cool.gif',
+		       '8O' => 'icon_eek.gif',
+		       ':(' => 'icon_sad.gif',
+		       ':)' => 'icon_smile.gif',
+		       ':?' => 'icon_confused.gif',
+		       ':D' => 'icon_biggrin.gif',
+		       ':P' => 'icon_razz.gif',
+		       ':o' => 'icon_surprised.gif',
+		       ':x' => 'icon_mad.gif',
+		       ':|' => 'icon_neutral.gif',
+		       ';)' => 'icon_wink.gif',
+		      ':!:' => 'icon_exclaim.gif',
+		      ':?:' => 'icon_question.gif',
+		);
+	}
+
+	if (count($wpsmiliestrans) == 0) {
+		return;
 	}
-}
 
-// Retrieves comment data given a comment ID or comment object.
-// Handles comment caching.
-function &get_comment(&$comment, $output = OBJECT) {
-	global $comment_cache, $wpdb;
+	/*
+	 * NOTE: we sort the smilies in reverse key order. This is to make sure
+	 * we match the longest possible smilie (:???: vs :?) as the regular
+	 * expression used below is first-match
+	 */
+	krsort($wpsmiliestrans);
 
-	if ( empty($comment) )
-		return null;
+	$wp_smiliessearch = '/(?:\s|^)';
 
-	if ( is_object($comment) ) {
-		if ( !isset($comment_cache[$comment->comment_ID]) )
-			$comment_cache[$comment->comment_ID] = &$comment;
-		$_comment = & $comment_cache[$comment->comment_ID];
-	} else {
-		if ( !isset($comment_cache[$comment]) ) {
-			$_comment = $wpdb->get_row("SELECT * FROM $wpdb->comments WHERE comment_ID = '$comment' LIMIT 1");
-			$comment_cache[$comment->comment_ID] = & $_comment;
+	$subchar = '';
+	foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
+		$firstchar = substr($smiley, 0, 1);
+		$rest = substr($smiley, 1);
+
+		// new subpattern?
+		if ($firstchar != $subchar) {
+			if ($subchar != '') {
+				$wp_smiliessearch .= ')|(?:\s|^)';
+			}
+			$subchar = $firstchar;
+			$wp_smiliessearch .= preg_quote($firstchar, '/') . '(?:';
 		} else {
-			$_comment = & $comment_cache[$comment];
+			$wp_smiliessearch .= '|';
+		}
+		$wp_smiliessearch .= preg_quote($rest, '/');
+	}
+
+	$wp_smiliessearch .= ')(?:\s|$)/m';
+}
+
+/**
+ * Merge user defined arguments into defaults array.
+ *
+ * This function is used throughout WordPress to allow for both string or array
+ * to be merged into another array.
+ *
+ * @since 2.2.0
+ *
+ * @param string|array $args Value to merge with $defaults
+ * @param array $defaults Array that serves as the defaults.
+ * @return array Merged user defined values with defaults.
+ */
+function wp_parse_args( $args, $defaults = '' ) {
+	if ( is_object( $args ) )
+		$r = get_object_vars( $args );
+	elseif ( is_array( $args ) )
+		$r =& $args;
+	else
+		wp_parse_str( $args, $r );
+
+	if ( is_array( $defaults ) )
+		return array_merge( $defaults, $r );
+	return $r;
+}
+
+/**
+ * Clean up an array, comma- or space-separated list of IDs.
+ *
+ * @since 3.0.0
+ *
+ * @param array|string $list
+ * @return array Sanitized array of IDs
+ */
+function wp_parse_id_list( $list ) {
+	if ( !is_array($list) )
+		$list = preg_split('/[\s,]+/', $list);
+
+	return array_unique(array_map('absint', $list));
+}
+
+/**
+ * Extract a slice of an array, given a list of keys.
+ *
+ * @since 3.1.0
+ *
+ * @param array $array The original array
+ * @param array $keys The list of keys
+ * @return array The array slice
+ */
+function wp_array_slice_assoc( $array, $keys ) {
+	$slice = array();
+	foreach ( $keys as $key )
+		if ( isset( $array[ $key ] ) )
+			$slice[ $key ] = $array[ $key ];
+
+	return $slice;
+}
+
+/**
+ * Filters a list of objects, based on a set of key => value arguments.
+ *
+ * @since 3.0.0
+ *
+ * @param array $list An array of objects to filter
+ * @param array $args An array of key => value arguments to match against each object
+ * @param string $operator The logical operation to perform. 'or' means only one element
+ *	from the array needs to match; 'and' means all elements must match. The default is 'and'.
+ * @param bool|string $field A field from the object to place instead of the entire object
+ * @return array A list of objects or object fields
+ */
+function wp_filter_object_list( $list, $args = array(), $operator = 'and', $field = false ) {
+	if ( ! is_array( $list ) )
+		return array();
+
+	$list = wp_list_filter( $list, $args, $operator );
+
+	if ( $field )
+		$list = wp_list_pluck( $list, $field );
+
+	return $list;
+}
+
+/**
+ * Filters a list of objects, based on a set of key => value arguments.
+ *
+ * @since 3.1.0
+ *
+ * @param array $list An array of objects to filter
+ * @param array $args An array of key => value arguments to match against each object
+ * @param string $operator The logical operation to perform:
+ *    'AND' means all elements from the array must match;
+ *    'OR' means only one element needs to match;
+ *    'NOT' means no elements may match.
+ *   The default is 'AND'.
+ * @return array
+ */
+function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
+	if ( ! is_array( $list ) )
+		return array();
+
+	if ( empty( $args ) )
+		return $list;
+
+	$operator = strtoupper( $operator );
+	$count = count( $args );
+	$filtered = array();
+
+	foreach ( $list as $key => $obj ) {
+		$to_match = (array) $obj;
+
+		$matched = 0;
+		foreach ( $args as $m_key => $m_value ) {
+			if ( array_key_exists( $m_key, $to_match ) && $m_value == $to_match[ $m_key ] )
+				$matched++;
 		}
-	}
 
-	if ( $output == OBJECT ) {
-		return $_comment;
-	} elseif ( $output == ARRAY_A ) {
-		return get_object_vars($_comment);
-	} elseif ( $output == ARRAY_N ) {
-		return array_values(get_object_vars($_comment));
-	} else {
-		return $_comment;
+		if ( ( 'AND' == $operator && $matched == $count )
+		  || ( 'OR' == $operator && $matched > 0 )
+		  || ( 'NOT' == $operator && 0 == $matched ) ) {
+			$filtered[$key] = $obj;
+		}
 	}
-}
 
-function get_catname($cat_ID) {
-	$category = &get_category($cat_ID);
-	return $category->cat_name;
+	return $filtered;
 }
 
-function get_all_category_ids() {
-	global $wpdb;
-	
-	if ( ! $cat_ids = wp_cache_get('all_category_ids', 'category') ) {
-		$cat_ids = $wpdb->get_col("SELECT cat_ID FROM $wpdb->categories");
-		wp_cache_add('all_category_ids', $cat_ids, 'category');
+/**
+ * Pluck a certain field out of each object in a list.
+ *
+ * @since 3.1.0
+ *
+ * @param array $list A list of objects or arrays
+ * @param int|string $field A field from the object to place instead of the entire object
+ * @return array
+ */
+function wp_list_pluck( $list, $field ) {
+	foreach ( $list as $key => $value ) {
+		if ( is_object( $value ) )
+			$list[ $key ] = $value->$field;
+		else
+			$list[ $key ] = $value[ $field ];
 	}
-	
-	return $cat_ids;
-}
 
-function get_all_page_ids() {
-	global $wpdb;
-	
-	if ( ! $page_ids = wp_cache_get('all_page_ids', 'pages') ) {
-		$page_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_status='static'");
-		wp_cache_add('all_page_ids', $page_ids, 'pages');
-	}
-	
-	return $page_ids;
+	return $list;
 }
 
-function gzip_compression() {
-	if ( !get_settings('gzipcompression') ) return false;
-
-	if ( extension_loaded('zlib') ) {
-		ob_start('ob_gzhandler');
-	}
+/**
+ * Determines if Widgets library should be loaded.
+ *
+ * Checks to make sure that the widgets library hasn't already been loaded. If
+ * it hasn't, then it will load the widgets library and run an action hook.
+ *
+ * @since 2.2.0
+ * @uses add_action() Calls '_admin_menu' hook with 'wp_widgets_add_menu' value.
+ */
+function wp_maybe_load_widgets() {
+	if ( ! apply_filters('load_default_widgets', true) )
+		return;
+	require_once( ABSPATH . WPINC . '/default-widgets.php' );
+	add_action( '_admin_menu', 'wp_widgets_add_menu' );
 }
 
+/**
+ * Append the Widgets menu to the themes main menu.
+ *
+ * @since 2.2.0
+ * @uses $submenu The administration submenu list.
+ */
+function wp_widgets_add_menu() {
+	global $submenu;
 
-// functions to count the page generation time (from phpBB2)
-// ( or just any time between timer_start() and timer_stop() )
+	if ( ! current_theme_supports( 'widgets' ) )
+		return;
 
-function timer_stop($display = 0, $precision = 3) { //if called like timer_stop(1), will echo $timetotal
-	global $timestart, $timeend;
-	$mtime = microtime();
-	$mtime = explode(' ',$mtime);
-	$mtime = $mtime[1] + $mtime[0];
-	$timeend = $mtime;
-	$timetotal = $timeend-$timestart;
-	if ( $display )
-		echo number_format($timetotal,$precision);
-	return $timetotal;
-}
+	$submenu['themes.php'][7] = array( __( 'Widgets' ), 'edit_theme_options', 'widgets.php' );
+	ksort( $submenu['themes.php'], SORT_NUMERIC );
+}
+
+/**
+ * Flush all output buffers for PHP 5.2.
+ *
+ * Make sure all output buffers are flushed before our singletons our destroyed.
+ *
+ * @since 2.2.0
+ */
+function wp_ob_end_flush_all() {
+	$levels = ob_get_level();
+	for ($i=0; $i<$levels; $i++)
+		ob_end_flush();
+}
+
+/**
+ * Load custom DB error or display WordPress DB error.
+ *
+ * If a file exists in the wp-content directory named db-error.php, then it will
+ * be loaded instead of displaying the WordPress DB error. If it is not found,
+ * then the WordPress DB error will be displayed instead.
+ *
+ * The WordPress DB error sets the HTTP status header to 500 to try to prevent
+ * search engines from caching the message. Custom DB messages should do the
+ * same.
+ *
+ * This function was backported to WordPress 2.3.2, but originally was added
+ * in WordPress 2.5.0.
+ *
+ * @since 2.3.2
+ * @uses $wpdb
+ */
+function dead_db() {
+	global $wpdb;
 
-function weblog_ping($server = '', $path = '') {
-	global $wp_version;
-	include_once (ABSPATH . WPINC . '/class-IXR.php');
+	// Load custom DB error template, if present.
+	if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
+		require_once( WP_CONTENT_DIR . '/db-error.php' );
+		die();
+	}
 
-	// using a timeout of 3 seconds should be enough to cover slow servers
-	$client = new IXR_Client($server, ((!strlen(trim($path)) || ('/' == $path)) ? false : $path));
-	$client->timeout = 3;
-	$client->useragent .= ' -- WordPress/'.$wp_version;
+	// If installing or in the admin, provide the verbose message.
+	if ( defined('WP_INSTALLING') || defined('WP_ADMIN') )
+		wp_die($wpdb->error);
 
-	// when set to true, this outputs debug messages by itself
-	$client->debug = false;
-	$home = trailingslashit( get_option('home') );
-	if ( !$client->query('weblogUpdates.extendedPing', get_settings('blogname'), $home, get_bloginfo('rss2_url') ) ) // then try a normal ping
-		$client->query('weblogUpdates.ping', get_settings('blogname'), $home);
-}
+	// Otherwise, be terse.
+	status_header( 500 );
+	nocache_headers();
+	header( 'Content-Type: text/html; charset=utf-8' );
 
-function generic_ping($post_id = 0) {
-	$services = get_settings('ping_sites');
-	$services = preg_replace("|(\s)+|", '$1', $services); // Kill dupe lines
-	$services = trim($services);
-	if ( '' != $services ) {
-		$services = explode("\n", $services);
-		foreach ($services as $service) {
-			weblog_ping($service);
+	wp_load_translations_early();
+?>
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"<?php if ( is_rtl() ) echo ' dir="rtl"'; ?>>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<title><?php _e( 'Database Error' ); ?></title>
+
+</head>
+<body>
+	<h1><?php _e( 'Error establishing a database connection' ); ?></h1>
+</body>
+</html>
+<?php
+	die();
+}
+
+/**
+ * Converts value to nonnegative integer.
+ *
+ * @since 2.5.0
+ *
+ * @param mixed $maybeint Data you wish to have converted to a nonnegative integer
+ * @return int An nonnegative integer
+ */
+function absint( $maybeint ) {
+	return abs( intval( $maybeint ) );
+}
+
+/**
+ * Determines if the blog can be accessed over SSL.
+ *
+ * Determines if blog can be accessed over SSL by using cURL to access the site
+ * using the https in the siteurl. Requires cURL extension to work correctly.
+ *
+ * @since 2.5.0
+ *
+ * @param string $url
+ * @return bool Whether SSL access is available
+ */
+function url_is_accessable_via_ssl($url)
+{
+	if ( in_array( 'curl', get_loaded_extensions() ) ) {
+		$ssl = set_url_scheme( $url, 'https' );
+
+		$ch = curl_init();
+		curl_setopt($ch, CURLOPT_URL, $ssl);
+		curl_setopt($ch, CURLOPT_FAILONERROR, true);
+		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+		curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
+
+		curl_exec($ch);
+
+		$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+		curl_close ($ch);
+
+		if ($status == 200 || $status == 401) {
+			return true;
 		}
 	}
-
-	return $post_id;
+	return false;
 }
 
-// Send a Trackback
-function trackback($trackback_url, $title, $excerpt, $ID) {
-	global $wpdb, $wp_version;
-
-	if ( empty($trackback_url) )
-		return;
-
-	$title = urlencode($title);
-	$excerpt = urlencode($excerpt);
-	$blog_name = urlencode(get_settings('blogname'));
-	$tb_url = $trackback_url;
-	$url = urlencode(get_permalink($ID));
-	$query_string = "title=$title&url=$url&blog_name=$blog_name&excerpt=$excerpt";
-	$trackback_url = parse_url($trackback_url);
-	$http_request = 'POST ' . $trackback_url['path'] . ($trackback_url['query'] ? '?'.$trackback_url['query'] : '') . " HTTP/1.0\r\n";
-	$http_request .= 'Host: '.$trackback_url['host']."\r\n";
-	$http_request .= 'Content-Type: application/x-www-form-urlencoded; charset='.get_settings('blog_charset')."\r\n";
-	$http_request .= 'Content-Length: '.strlen($query_string)."\r\n";
-	$http_request .= "User-Agent: WordPress/" . $wp_version;
-	$http_request .= "\r\n\r\n";
-	$http_request .= $query_string;
-	if ( '' == $trackback_url['port'] )
-		$trackback_url['port'] = 80;
-	$fs = @fsockopen($trackback_url['host'], $trackback_url['port'], $errno, $errstr, 4);
-	@fputs($fs, $http_request);
-/*
-	$debug_file = 'trackback.log';
-	$fp = fopen($debug_file, 'a');
-	fwrite($fp, "\n*****\nRequest:\n\n$http_request\n\nResponse:\n\n");
-	while(!@feof($fs)) {
-		fwrite($fp, @fgets($fs, 4096));
-	}
-	fwrite($fp, "\n\n");
-	fclose($fp);
-*/
-	@fclose($fs);
-
-	$tb_url = addslashes( $tb_url );
-	$wpdb->query("UPDATE $wpdb->posts SET pinged = CONCAT(pinged, '\n', '$tb_url') WHERE ID = '$ID'");
-	return $wpdb->query("UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, '$tb_url', '')) WHERE ID = '$ID'");
-}
-
-function make_url_footnote($content) {
-	preg_match_all('/<a(.+?)href=\"(.+?)\"(.*?)>(.+?)<\/a>/', $content, $matches);
-	$j = 0;
-	for ($i=0; $i<count($matches[0]); $i++) {
-		$links_summary = (!$j) ? "\n" : $links_summary;
-		$j++;
-		$link_match = $matches[0][$i];
-		$link_number = '['.($i+1).']';
-		$link_url = $matches[2][$i];
-		$link_text = $matches[4][$i];
-		$content = str_replace($link_match, $link_text.' '.$link_number, $content);
-		$link_url = ((strtolower(substr($link_url,0,7)) != 'http://') && (strtolower(substr($link_url,0,8)) != 'https://')) ? get_settings('home') . $link_url : $link_url;
-		$links_summary .= "\n".$link_number.' '.$link_url;
-	}
-	$content = strip_tags($content);
-	$content .= $links_summary;
-	return $content;
+/**
+ * Marks a function as deprecated and informs when it has been used.
+ *
+ * There is a hook deprecated_function_run that will be called that can be used
+ * to get the backtrace up to what file and function called the deprecated
+ * function.
+ *
+ * The current behavior is to trigger a user error if WP_DEBUG is true.
+ *
+ * This function is to be used in every function that is deprecated.
+ *
+ * @package WordPress
+ * @subpackage Debug
+ * @since 2.5.0
+ * @access private
+ *
+ * @uses do_action() Calls 'deprecated_function_run' and passes the function name, what to use instead,
+ *   and the version the function was deprecated in.
+ * @uses apply_filters() Calls 'deprecated_function_trigger_error' and expects boolean value of true to do
+ *   trigger or false to not trigger error.
+ *
+ * @param string $function The function that was called
+ * @param string $version The version of WordPress that deprecated the function
+ * @param string $replacement Optional. The function that should have been called
+ */
+function _deprecated_function( $function, $version, $replacement = null ) {
+
+	do_action( 'deprecated_function_run', $function, $replacement, $version );
+
+	// Allow plugin to filter the output error trigger
+	if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
+		if ( function_exists( '__' ) ) {
+			if ( ! is_null( $replacement ) )
+				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
+			else
+				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
+		} else {
+			if ( ! is_null( $replacement ) )
+				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $function, $version, $replacement ) );
+			else
+				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
+		}
+	}
 }
 
-
-function xmlrpc_getposttitle($content) {
-	global $post_default_title;
-	if ( preg_match('/<title>(.+?)<\/title>/is', $content, $matchtitle) ) {
-		$post_title = $matchtitle[0];
-		$post_title = preg_replace('/<title>/si', '', $post_title);
-		$post_title = preg_replace('/<\/title>/si', '', $post_title);
-	} else {
-		$post_title = $post_default_title;
+/**
+ * Marks a file as deprecated and informs when it has been used.
+ *
+ * There is a hook deprecated_file_included that will be called that can be used
+ * to get the backtrace up to what file and function included the deprecated
+ * file.
+ *
+ * The current behavior is to trigger a user error if WP_DEBUG is true.
+ *
+ * This function is to be used in every file that is deprecated.
+ *
+ * @package WordPress
+ * @subpackage Debug
+ * @since 2.5.0
+ * @access private
+ *
+ * @uses do_action() Calls 'deprecated_file_included' and passes the file name, what to use instead,
+ *   the version in which the file was deprecated, and any message regarding the change.
+ * @uses apply_filters() Calls 'deprecated_file_trigger_error' and expects boolean value of true to do
+ *   trigger or false to not trigger error.
+ *
+ * @param string $file The file that was included
+ * @param string $version The version of WordPress that deprecated the file
+ * @param string $replacement Optional. The file that should have been included based on ABSPATH
+ * @param string $message Optional. A message regarding the change
+ */
+function _deprecated_file( $file, $version, $replacement = null, $message = '' ) {
+
+	do_action( 'deprecated_file_included', $file, $replacement, $version, $message );
+
+	// Allow plugin to filter the output error trigger
+	if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
+		$message = empty( $message ) ? '' : ' ' . $message;
+		if ( function_exists( '__' ) ) {
+			if ( ! is_null( $replacement ) )
+				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message );
+			else
+				trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message );
+		} else {
+			if ( ! is_null( $replacement ) )
+				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $file, $version, $replacement ) . $message );
+			else
+				trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.', $file, $version ) . $message );
+		}
 	}
-	return $post_title;
 }
-
-function xmlrpc_getpostcategory($content) {
-	global $post_default_category;
-	if ( preg_match('/<category>(.+?)<\/category>/is', $content, $matchcat) ) {
-		$post_category = trim($matchcat[1], ',');
-		$post_category = explode(',', $post_category);
-	} else {
-		$post_category = $post_default_category;
+/**
+ * Marks a function argument as deprecated and informs when it has been used.
+ *
+ * This function is to be used whenever a deprecated function argument is used.
+ * Before this function is called, the argument must be checked for whether it was
+ * used by comparing it to its default value or evaluating whether it is empty.
+ * For example:
+ * <code>
+ * if ( !empty($deprecated) )
+ * 	_deprecated_argument( __FUNCTION__, '3.0' );
+ * </code>
+ *
+ * There is a hook deprecated_argument_run that will be called that can be used
+ * to get the backtrace up to what file and function used the deprecated
+ * argument.
+ *
+ * The current behavior is to trigger a user error if WP_DEBUG is true.
+ *
+ * @package WordPress
+ * @subpackage Debug
+ * @since 3.0.0
+ * @access private
+ *
+ * @uses do_action() Calls 'deprecated_argument_run' and passes the function name, a message on the change,
+ *   and the version in which the argument was deprecated.
+ * @uses apply_filters() Calls 'deprecated_argument_trigger_error' and expects boolean value of true to do
+ *   trigger or false to not trigger error.
+ *
+ * @param string $function The function that was called
+ * @param string $version The version of WordPress that deprecated the argument used
+ * @param string $message Optional. A message regarding the change.
+ */
+function _deprecated_argument( $function, $version, $message = null ) {
+
+	do_action( 'deprecated_argument_run', $function, $message, $version );
+
+	// Allow plugin to filter the output error trigger
+	if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
+		if ( function_exists( '__' ) ) {
+			if ( ! is_null( $message ) )
+				trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) );
+			else
+				trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
+		} else {
+			if ( ! is_null( $message ) )
+				trigger_error( sprintf( '%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s', $function, $version, $message ) );
+			else
+				trigger_error( sprintf( '%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
+		}
 	}
-	return $post_category;
 }
 
-function xmlrpc_removepostdata($content) {
-	$content = preg_replace('/<title>(.+?)<\/title>/si', '', $content);
-	$content = preg_replace('/<category>(.+?)<\/category>/si', '', $content);
-	$content = trim($content);
-	return $content;
+/**
+ * Marks something as being incorrectly called.
+ *
+ * There is a hook doing_it_wrong_run that will be called that can be used
+ * to get the backtrace up to what file and function called the deprecated
+ * function.
+ *
+ * The current behavior is to trigger a user error if WP_DEBUG is true.
+ *
+ * @package WordPress
+ * @subpackage Debug
+ * @since 3.1.0
+ * @access private
+ *
+ * @uses do_action() Calls 'doing_it_wrong_run' and passes the function arguments.
+ * @uses apply_filters() Calls 'doing_it_wrong_trigger_error' and expects boolean value of true to do
+ *   trigger or false to not trigger error.
+ *
+ * @param string $function The function that was called.
+ * @param string $message A message explaining what has been done incorrectly.
+ * @param string $version The version of WordPress where the message was added.
+ */
+function _doing_it_wrong( $function, $message, $version ) {
+
+	do_action( 'doing_it_wrong_run', $function, $message, $version );
+
+	// Allow plugin to filter the output error trigger
+	if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
+		if ( function_exists( '__' ) ) {
+			$version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
+			$message .= ' ' . __( 'Please see <a href="http://codex.wordpress.org/Debugging_in_WordPress">Debugging in WordPress</a> for more information.' );
+			trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
+		} else {
+			$version = is_null( $version ) ? '' : sprintf( '(This message was added in version %s.)', $version );
+			$message .= ' Please see <a href="http://codex.wordpress.org/Debugging_in_WordPress">Debugging in WordPress</a> for more information.';
+			trigger_error( sprintf( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s', $function, $message, $version ) );
+		}
+	}
 }
 
-function debug_fopen($filename, $mode) {
-	global $debug;
-	if ( $debug == 1 ) {
-		$fp = fopen($filename, $mode);
-		return $fp;
-	} else {
+/**
+ * Is the server running earlier than 1.5.0 version of lighttpd?
+ *
+ * @since 2.5.0
+ *
+ * @return bool Whether the server is running lighttpd < 1.5.0
+ */
+function is_lighttpd_before_150() {
+	$server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] )? $_SERVER['SERVER_SOFTWARE'] : '' );
+	$server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : '';
+	return  'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
+}
+
+/**
+ * Does the specified module exist in the Apache config?
+ *
+ * @since 2.5.0
+ *
+ * @param string $mod e.g. mod_rewrite
+ * @param bool $default The default return value if the module is not found
+ * @return bool
+ */
+function apache_mod_loaded($mod, $default = false) {
+	global $is_apache;
+
+	if ( !$is_apache )
 		return false;
-	}
-}
 
-function debug_fwrite($fp, $string) {
-	global $debug;
-	if ( $debug == 1 ) {
-		fwrite($fp, $string);
+	if ( function_exists('apache_get_modules') ) {
+		$mods = apache_get_modules();
+		if ( in_array($mod, $mods) )
+			return true;
+	} elseif ( function_exists('phpinfo') ) {
+			ob_start();
+			phpinfo(8);
+			$phpinfo = ob_get_clean();
+			if ( false !== strpos($phpinfo, $mod) )
+				return true;
 	}
+	return $default;
+}
+
+/**
+ * Check if IIS 7+ supports pretty permalinks.
+ *
+ * @since 2.8.0
+ *
+ * @return bool
+ */
+function iis7_supports_permalinks() {
+	global $is_iis7;
+
+	$supports_permalinks = false;
+	if ( $is_iis7 ) {
+		/* First we check if the DOMDocument class exists. If it does not exist, then we cannot
+		 * easily update the xml configuration file, hence we just bail out and tell user that
+		 * pretty permalinks cannot be used.
+		 *
+		 * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
+		 * URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
+		 * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
+		 * via ISAPI then pretty permalinks will not work.
+		 */
+		$supports_permalinks = class_exists('DOMDocument') && isset($_SERVER['IIS_UrlRewriteModule']) && ( php_sapi_name() == 'cgi-fcgi' );
+	}
+
+	return apply_filters('iis7_supports_permalinks', $supports_permalinks);
+}
+
+/**
+ * File validates against allowed set of defined rules.
+ *
+ * A return value of '1' means that the $file contains either '..' or './'. A
+ * return value of '2' means that the $file contains ':' after the first
+ * character. A return value of '3' means that the file is not in the allowed
+ * files list.
+ *
+ * @since 1.2.0
+ *
+ * @param string $file File path.
+ * @param array $allowed_files List of allowed files.
+ * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
+ */
+function validate_file( $file, $allowed_files = '' ) {
+	if ( false !== strpos( $file, '..' ) )
+		return 1;
+
+	if ( false !== strpos( $file, './' ) )
+		return 1;
+
+	if ( ! empty( $allowed_files ) && ! in_array( $file, $allowed_files ) )
+		return 3;
+
+	if (':' == substr( $file, 1, 1 ) )
+		return 2;
+
+	return 0;
 }
 
-function debug_fclose($fp) {
-	global $debug;
-	if ( $debug == 1 ) {
-		fclose($fp);
+/**
+ * Determine if SSL is used.
+ *
+ * @since 2.6.0
+ *
+ * @return bool True if SSL, false if not used.
+ */
+function is_ssl() {
+	if ( isset($_SERVER['HTTPS']) ) {
+		if ( 'on' == strtolower($_SERVER['HTTPS']) )
+			return true;
+		if ( '1' == $_SERVER['HTTPS'] )
+			return true;
+	} elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
+		return true;
 	}
+	return false;
 }
 
-function spawn_pinger() {
-	global $wpdb;
-	$doping = false;
-	if ( $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE TRIM(to_ping) != '' LIMIT 1") )
-		$doping = true;
-
-	if ( $wpdb->get_var("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_pingme' OR meta_key = '_encloseme' LIMIT 1") )
-		$doping = true;
+/**
+ * Whether SSL login should be forced.
+ *
+ * @since 2.6.0
+ *
+ * @param string|bool $force Optional.
+ * @return bool True if forced, false if not forced.
+ */
+function force_ssl_login( $force = null ) {
+	static $forced = false;
+
+	if ( !is_null( $force ) ) {
+		$old_forced = $forced;
+		$forced = $force;
+		return $old_forced;
+	}
+
+	return $forced;
+}
+
+/**
+ * Whether to force SSL used for the Administration Screens.
+ *
+ * @since 2.6.0
+ *
+ * @param string|bool $force
+ * @return bool True if forced, false if not forced.
+ */
+function force_ssl_admin( $force = null ) {
+	static $forced = false;
+
+	if ( !is_null( $force ) ) {
+		$old_forced = $forced;
+		$forced = $force;
+		return $old_forced;
+	}
+
+	return $forced;
+}
+
+/**
+ * Guess the URL for the site.
+ *
+ * Will remove wp-admin links to retrieve only return URLs not in the wp-admin
+ * directory.
+ *
+ * @since 2.6.0
+ *
+ * @return string
+ */
+function wp_guess_url() {
+	if ( defined('WP_SITEURL') && '' != WP_SITEURL ) {
+		$url = WP_SITEURL;
+	} else {
+		$schema = is_ssl() ? 'https://' : 'http://'; // set_url_scheme() is not defined yet
+		$url = preg_replace( '#/(wp-admin/.*|wp-login.php)#i', '', $schema . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
+	}
+
+	return rtrim($url, '/');
+}
+
+/**
+ * Temporarily suspend cache additions.
+ *
+ * Stops more data being added to the cache, but still allows cache retrieval.
+ * This is useful for actions, such as imports, when a lot of data would otherwise
+ * be almost uselessly added to the cache.
+ *
+ * Suspension lasts for a single page load at most. Remember to call this
+ * function again if you wish to re-enable cache adds earlier.
+ *
+ * @since 3.3.0
+ *
+ * @param bool $suspend Optional. Suspends additions if true, re-enables them if false.
+ * @return bool The current suspend setting
+ */
+function wp_suspend_cache_addition( $suspend = null ) {
+	static $_suspend = false;
+
+	if ( is_bool( $suspend ) )
+		$_suspend = $suspend;
+
+	return $_suspend;
+}
+
+/**
+ * Suspend cache invalidation.
+ *
+ * Turns cache invalidation on and off. Useful during imports where you don't wont to do invalidations
+ * every time a post is inserted. Callers must be sure that what they are doing won't lead to an inconsistent
+ * cache when invalidation is suspended.
+ *
+ * @since 2.7.0
+ *
+ * @param bool $suspend Whether to suspend or enable cache invalidation
+ * @return bool The current suspend setting
+ */
+function wp_suspend_cache_invalidation($suspend = true) {
+	global $_wp_suspend_cache_invalidation;
+
+	$current_suspend = $_wp_suspend_cache_invalidation;
+	$_wp_suspend_cache_invalidation = $suspend;
+	return $current_suspend;
+}
+
+/**
+ * Is main site?
+ *
+ *
+ * @since 3.0.0
+ * @package WordPress
+ *
+ * @param int $blog_id optional blog id to test (default current blog)
+ * @return bool True if not multisite or $blog_id is main site
+ */
+function is_main_site( $blog_id = '' ) {
+	global $current_site;
+
+	if ( ! is_multisite() )
+		return true;
 
-	if ( substr(php_sapi_name(), 0, 3) == 'cgi' )
-		return $doping;
+	if ( ! $blog_id )
+		$blog_id = get_current_blog_id();
 
-	if ( $doping ) {
-		$ping_url = get_settings('siteurl') .'/wp-admin/execute-pings.php';
-		$parts = parse_url($ping_url);
-		$argyle = @ fsockopen($parts['host'], $_SERVER['SERVER_PORT'], $errno, $errstr, 0.01);
-		if ( $argyle )
-			fputs($argyle, "GET {$parts['path']}?time=".time()." HTTP/1.0\r\nHost: {$_SERVER['HTTP_HOST']}\r\n\r\n");
-       }
+	return $blog_id == $current_site->blog_id;
 }
 
-function do_enclose( $content, $post_ID ) {
-	global $wp_version, $wpdb;
-	include_once (ABSPATH . WPINC . '/class-IXR.php');
-
-	$log = debug_fopen(ABSPATH . '/enclosures.log', 'a');
-	$post_links = array();
-	debug_fwrite($log, 'BEGIN '.date('YmdHis', time())."\n");
-
-	$pung = get_enclosed( $post_ID );
-
-	$ltrs = '\w';
-	$gunk = '/#~:.?+=&%@!\-';
-	$punc = '.:?\-';
-	$any = $ltrs . $gunk . $punc;
-
-	preg_match_all("{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp);
-
-	debug_fwrite($log, 'Post contents:');
-	debug_fwrite($log, $content."\n");
+/**
+ * Whether global terms are enabled.
+ *
+ *
+ * @since 3.0.0
+ * @package WordPress
+ *
+ * @return bool True if multisite and global terms enabled
+ */
+function global_terms_enabled() {
+	if ( ! is_multisite() )
+		return false;
 
-	foreach($post_links_temp[0] as $link_test) :
-		if ( !in_array($link_test, $pung) ) : // If we haven't pung it already
-			$test = parse_url($link_test);
-			if ( isset($test['query']) )
-				$post_links[] = $link_test;
-			elseif (($test['path'] != '/') && ($test['path'] != ''))
-				$post_links[] = $link_test;
-		endif;
-	endforeach;
+	static $global_terms = null;
+	if ( is_null( $global_terms ) ) {
+		$filter = apply_filters( 'global_terms_enabled', null );
+		if ( ! is_null( $filter ) )
+			$global_terms = (bool) $filter;
+		else
+			$global_terms = (bool) get_site_option( 'global_terms_enabled', false );
+	}
+	return $global_terms;
+}
+
+/**
+ * gmt_offset modification for smart timezone handling.
+ *
+ * Overrides the gmt_offset option if we have a timezone_string available.
+ *
+ * @since 2.8.0
+ *
+ * @return float|bool
+ */
+function wp_timezone_override_offset() {
+	if ( !$timezone_string = get_option( 'timezone_string' ) ) {
+		return false;
+	}
 
-	foreach ($post_links as $url) :
-		if ( $url != '' && !$wpdb->get_var("SELECT post_id FROM $wpdb->postmeta WHERE post_id = '$post_ID' AND meta_key = 'enclosure' AND meta_value LIKE ('$url%')") ) {
-			if ( $headers = wp_get_http_headers( $url) ) {
-				$len = (int) $headers['content-length'];
-				$type = $wpdb->escape( $headers['content-type'] );
-				$allowed_types = array( 'video', 'audio' );
-				if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {
-					$meta_value = "$url\n$len\n$type\n";
-					$wpdb->query( "INSERT INTO `$wpdb->postmeta` ( `post_id` , `meta_key` , `meta_value` )
-					VALUES ( '$post_ID', 'enclosure' , '$meta_value')" );
-				}
+	$timezone_object = timezone_open( $timezone_string );
+	$datetime_object = date_create();
+	if ( false === $timezone_object || false === $datetime_object ) {
+		return false;
+	}
+	return round( timezone_offset_get( $timezone_object, $datetime_object ) / HOUR_IN_SECONDS, 2 );
+}
+
+/**
+ * {@internal Missing Short Description}}
+ *
+ * @since 2.9.0
+ *
+ * @param unknown_type $a
+ * @param unknown_type $b
+ * @return int
+ */
+function _wp_timezone_choice_usort_callback( $a, $b ) {
+	// Don't use translated versions of Etc
+	if ( 'Etc' === $a['continent'] && 'Etc' === $b['continent'] ) {
+		// Make the order of these more like the old dropdown
+		if ( 'GMT+' === substr( $a['city'], 0, 4 ) && 'GMT+' === substr( $b['city'], 0, 4 ) ) {
+			return -1 * ( strnatcasecmp( $a['city'], $b['city'] ) );
+		}
+		if ( 'UTC' === $a['city'] ) {
+			if ( 'GMT+' === substr( $b['city'], 0, 4 ) ) {
+				return 1;
+			}
+			return -1;
+		}
+		if ( 'UTC' === $b['city'] ) {
+			if ( 'GMT+' === substr( $a['city'], 0, 4 ) ) {
+				return -1;
 			}
+			return 1;
+		}
+		return strnatcasecmp( $a['city'], $b['city'] );
+	}
+	if ( $a['t_continent'] == $b['t_continent'] ) {
+		if ( $a['t_city'] == $b['t_city'] ) {
+			return strnatcasecmp( $a['t_subcity'], $b['t_subcity'] );
+		}
+		return strnatcasecmp( $a['t_city'], $b['t_city'] );
+	} else {
+		// Force Etc to the bottom of the list
+		if ( 'Etc' === $a['continent'] ) {
+			return 1;
+		}
+		if ( 'Etc' === $b['continent'] ) {
+			return -1;
 		}
-	endforeach;
+		return strnatcasecmp( $a['t_continent'], $b['t_continent'] );
+	}
 }
 
-function wp_get_http_headers( $url, $red = 1 ) {
-	global $wp_version;
-	@set_time_limit( 60 );
-
-	if ( $red > 5 )
-	   return false;
+/**
+ * Gives a nicely formatted list of timezone strings.
+ *
+ * @since 2.9.0
+ *
+ * @param string $selected_zone Selected Zone
+ * @return string
+ */
+function wp_timezone_choice( $selected_zone ) {
+	static $mo_loaded = false;
 
-	$parts = parse_url( $url );
-	$file = $parts['path'] . ($parts['query'] ? '?'.$parts['query'] : '');
-	$host = $parts['host'];
-	if ( !isset( $parts['port'] ) )
-		$parts['port'] = 80;
+	$continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific');
 
-	$head = "HEAD $file HTTP/1.1\r\nHOST: $host\r\nUser-Agent: WordPress/" . $wp_version . "\r\n\r\n";
+	// Load translations for continents and cities
+	if ( !$mo_loaded ) {
+		$locale = get_locale();
+		$mofile = WP_LANG_DIR . '/continents-cities-' . $locale . '.mo';
+		load_textdomain( 'continents-cities', $mofile );
+		$mo_loaded = true;
+	}
 
-	$fp = @fsockopen($host, $parts['port'], $err_num, $err_msg, 3);
-	if ( !$fp )
-		return false;
+	$zonen = array();
+	foreach ( timezone_identifiers_list() as $zone ) {
+		$zone = explode( '/', $zone );
+		if ( !in_array( $zone[0], $continents ) ) {
+			continue;
+		}
 
-	$response = '';
-	fputs( $fp, $head );
-	while ( !feof( $fp ) && strpos( $response, "\r\n\r\n" ) == false )
-		$response .= fgets( $fp, 2048 );
-	fclose( $fp );
-	preg_match_all('/(.*?): (.*)\r/', $response, $matches);
-	$count = count($matches[1]);
-	for ( $i = 0; $i < $count; $i++) {
-		$key = strtolower($matches[1][$i]);
-		$headers["$key"] = $matches[2][$i];
-	}
-
-    $code = preg_replace('/.*?(\d{3}).*/i', '$1', $response);
-    
-    $headers['status_code'] = $code;
-    
-    if ( '302' == $code || '301' == $code )
-        return wp_get_http_headers( $url, ++$red );
-
-	preg_match('/.*([0-9]{3}).*/', $response, $return);
-	$headers['response'] = $return[1]; // HTTP response code eg 204, 200, 404
-	return $headers;
-}
+		// This determines what gets set and translated - we don't translate Etc/* strings here, they are done later
+		$exists = array(
+			0 => ( isset( $zone[0] ) && $zone[0] ),
+			1 => ( isset( $zone[1] ) && $zone[1] ),
+			2 => ( isset( $zone[2] ) && $zone[2] ),
+		);
+		$exists[3] = ( $exists[0] && 'Etc' !== $zone[0] );
+		$exists[4] = ( $exists[1] && $exists[3] );
+		$exists[5] = ( $exists[2] && $exists[3] );
 
-// Deprecated.  Use the new post loop.
-function start_wp() {
-	global $wp_query, $post;
+		$zonen[] = array(
+			'continent'   => ( $exists[0] ? $zone[0] : '' ),
+			'city'        => ( $exists[1] ? $zone[1] : '' ),
+			'subcity'     => ( $exists[2] ? $zone[2] : '' ),
+			't_continent' => ( $exists[3] ? translate( str_replace( '_', ' ', $zone[0] ), 'continents-cities' ) : '' ),
+			't_city'      => ( $exists[4] ? translate( str_replace( '_', ' ', $zone[1] ), 'continents-cities' ) : '' ),
+			't_subcity'   => ( $exists[5] ? translate( str_replace( '_', ' ', $zone[2] ), 'continents-cities' ) : '' )
+		);
+	}
+	usort( $zonen, '_wp_timezone_choice_usort_callback' );
 
-	// Since the old style loop is being used, advance the query iterator here.
-	$wp_query->next_post();
+	$structure = array();
 
-	setup_postdata($post);
-}
+	if ( empty( $selected_zone ) ) {
+		$structure[] = '<option selected="selected" value="">' . __( 'Select a city' ) . '</option>';
+	}
 
-// Setup global post data.
-function setup_postdata($post) {
-	global $id, $postdata, $authordata, $day, $page, $pages, $multipage, $more, $numpages, $wp_query;
-	global $pagenow;
+	foreach ( $zonen as $key => $zone ) {
+		// Build value in an array to join later
+		$value = array( $zone['continent'] );
 
-	$id = $post->ID;
+		if ( empty( $zone['city'] ) ) {
+			// It's at the continent level (generally won't happen)
+			$display = $zone['t_continent'];
+		} else {
+			// It's inside a continent group
 
-	$authordata = get_userdata($post->post_author);
+			// Continent optgroup
+			if ( !isset( $zonen[$key - 1] ) || $zonen[$key - 1]['continent'] !== $zone['continent'] ) {
+				$label = $zone['t_continent'];
+				$structure[] = '<optgroup label="'. esc_attr( $label ) .'">';
+			}
 
-	$day = mysql2date('d.m.y', $post->post_date);
-	$currentmonth = mysql2date('m', $post->post_date);
-	$numpages = 1;
-	$page = get_query_var('page');
-	if ( !$page )
-		$page = 1;
-	if ( is_single() || is_page() )
-		$more = 1;
-	$content = $post->post_content;
-	if ( preg_match('/<!--nextpage-->/', $content) ) {
-		if ( $page > 1 )
-			$more = 1;
-		$multipage = 1;
-		$content = str_replace("\n<!--nextpage-->\n", '<!--nextpage-->', $content);
-		$content = str_replace("\n<!--nextpage-->", '<!--nextpage-->', $content);
-		$content = str_replace("<!--nextpage-->\n", '<!--nextpage-->', $content);
-		$pages = explode('<!--nextpage-->', $content);
-		$numpages = count($pages);
-	} else {
-		$pages[0] = $post->post_content;
-		$multipage = 0;
-	}
-	return true;
-}
+			// Add the city to the value
+			$value[] = $zone['city'];
 
-function is_new_day() {
-	global $day, $previousday;
-	if ( $day != $previousday ) {
-		return(1);
-	} else {
-		return(0);
-	}
-}
+			$display = $zone['t_city'];
+			if ( !empty( $zone['subcity'] ) ) {
+				// Add the subcity to the value
+				$value[] = $zone['subcity'];
+				$display .= ' - ' . $zone['t_subcity'];
+			}
+		}
 
-// Filters: these are the core of WP's plugin architecture
+		// Build the value
+		$value = join( '/', $value );
+		$selected = '';
+		if ( $value === $selected_zone ) {
+			$selected = 'selected="selected" ';
+		}
+		$structure[] = '<option ' . $selected . 'value="' . esc_attr( $value ) . '">' . esc_html( $display ) . "</option>";
 
-function merge_filters($tag) {
-	global $wp_filter;
-	if ( isset($wp_filter['all']) ) {
-		foreach ($wp_filter['all'] as $priority => $functions) {
-			if ( isset($wp_filter[$tag][$priority]) )
-				$wp_filter[$tag][$priority] = array_merge($wp_filter['all'][$priority], $wp_filter[$tag][$priority]);
-			else
-				$wp_filter[$tag][$priority] = array_merge($wp_filter['all'][$priority], array());
-			$wp_filter[$tag][$priority] = array_unique($wp_filter[$tag][$priority]);
+		// Close continent optgroup
+		if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) {
+			$structure[] = '</optgroup>';
 		}
 	}
 
-	if ( isset($wp_filter[$tag]) )
-		ksort( $wp_filter[$tag] );
-}
-
-function apply_filters($tag, $string) {
-	global $wp_filter;
-
-	$args = array_slice(func_get_args(), 2);
+	// Do UTC
+	$structure[] = '<optgroup label="'. esc_attr__( 'UTC' ) .'">';
+	$selected = '';
+	if ( 'UTC' === $selected_zone )
+		$selected = 'selected="selected" ';
+	$structure[] = '<option ' . $selected . 'value="' . esc_attr( 'UTC' ) . '">' . __('UTC') . '</option>';
+	$structure[] = '</optgroup>';
+
+	// Do manual UTC offsets
+	$structure[] = '<optgroup label="'. esc_attr__( 'Manual Offsets' ) .'">';
+	$offset_range = array (-12, -11.5, -11, -10.5, -10, -9.5, -9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5,
+		0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 5.75, 6, 6.5, 7, 7.5, 8, 8.5, 8.75, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.75, 13, 13.75, 14);
+	foreach ( $offset_range as $offset ) {
+		if ( 0 <= $offset )
+			$offset_name = '+' . $offset;
+		else
+			$offset_name = (string) $offset;
+
+		$offset_value = $offset_name;
+		$offset_name = str_replace(array('.25','.5','.75'), array(':15',':30',':45'), $offset_name);
+		$offset_name = 'UTC' . $offset_name;
+		$offset_value = 'UTC' . $offset_value;
+		$selected = '';
+		if ( $offset_value === $selected_zone )
+			$selected = 'selected="selected" ';
+		$structure[] = '<option ' . $selected . 'value="' . esc_attr( $offset_value ) . '">' . esc_html( $offset_name ) . "</option>";
+
+	}
+	$structure[] = '</optgroup>';
+
+	return join( "\n", $structure );
+}
+
+/**
+ * Strip close comment and close php tags from file headers used by WP.
+ * See http://core.trac.wordpress.org/ticket/8497
+ *
+ * @since 2.8.0
+ *
+ * @param string $str
+ * @return string
+ */
+function _cleanup_header_comment($str) {
+	return trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $str));
+}
+
+/**
+ * Permanently deletes posts, pages, attachments, and comments which have been in the trash for EMPTY_TRASH_DAYS.
+ *
+ * @since 2.9.0
+ */
+function wp_scheduled_delete() {
+	global $wpdb;
 
-	merge_filters($tag);
+	$delete_timestamp = time() - ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );
 
-	if ( !isset($wp_filter[$tag]) ) {
-		return $string;
-	}
-	foreach ($wp_filter[$tag] as $priority => $functions) {
-		if ( !is_null($functions) ) {
-			foreach($functions as $function) {
+	$posts_to_delete = $wpdb->get_results($wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < '%d'", $delete_timestamp), ARRAY_A);
 
-				$all_args = array_merge(array($string), $args);
-				$function_name = $function['function'];
-				$accepted_args = $function['accepted_args'];
+	foreach ( (array) $posts_to_delete as $post ) {
+		$post_id = (int) $post['post_id'];
+		if ( !$post_id )
+			continue;
 
-				if ( $accepted_args == 1 )
-					$the_args = array($string);
-				elseif ( $accepted_args > 1 )
-					$the_args = array_slice($all_args, 0, $accepted_args);
-				elseif ( $accepted_args == 0 )
-					$the_args = NULL;
-				else
-					$the_args = $all_args;
+		$del_post = get_post($post_id);
 
-				$string = call_user_func_array($function_name, $the_args);
-			}
+		if ( !$del_post || 'trash' != $del_post->post_status ) {
+			delete_post_meta($post_id, '_wp_trash_meta_status');
+			delete_post_meta($post_id, '_wp_trash_meta_time');
+		} else {
+			wp_delete_post($post_id);
 		}
 	}
-	return $string;
-}
 
-function add_filter($tag, $function_to_add, $priority = 10, $accepted_args = 1) {
-	global $wp_filter;
-
-	// check that we don't already have the same filter at the same priority
-	if ( isset($wp_filter[$tag]["$priority"]) ) {
-		foreach($wp_filter[$tag]["$priority"] as $filter) {
-			// uncomment if we want to match function AND accepted_args
-			// if ( $filter == array($function, $accepted_args) ) {
-			if ( $filter['function'] == $function_to_add ) {
-				return true;
-			}
-		}
-	}
+	$comments_to_delete = $wpdb->get_results($wpdb->prepare("SELECT comment_id FROM $wpdb->commentmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < '%d'", $delete_timestamp), ARRAY_A);
 
-	// So the format is wp_filter['tag']['array of priorities']['array of ['array (functions, accepted_args)]']
-	$wp_filter[$tag]["$priority"][] = array('function'=>$function_to_add, 'accepted_args'=>$accepted_args);
-	return true;
-}
+	foreach ( (array) $comments_to_delete as $comment ) {
+		$comment_id = (int) $comment['comment_id'];
+		if ( !$comment_id )
+			continue;
 
-function remove_filter($tag, $function_to_remove, $priority = 10, $accepted_args = 1) {
-	global $wp_filter;
+		$del_comment = get_comment($comment_id);
 
-	// rebuild the list of filters
-	if ( isset($wp_filter[$tag]["$priority"]) ) {
-		foreach($wp_filter[$tag]["$priority"] as $filter) {
-			if ( $filter['function'] != $function_to_remove ) {
-				$new_function_list[] = $filter;
-			}
+		if ( !$del_comment || 'trash' != $del_comment->comment_approved ) {
+			delete_comment_meta($comment_id, '_wp_trash_meta_time');
+			delete_comment_meta($comment_id, '_wp_trash_meta_status');
+		} else {
+			wp_delete_comment($comment_id);
 		}
-		$wp_filter[$tag]["$priority"] = $new_function_list;
 	}
-	return true;
 }
 
-// The *_action functions are just aliases for the *_filter functions, they take special strings instead of generic content
-
-function do_action($tag, $arg = '') {
-	global $wp_filter;
-	$extra_args = array_slice(func_get_args(), 2);
- 	if ( is_array($arg) )
- 		$args = array_merge($arg, $extra_args);
-	else
-		$args = array_merge(array($arg), $extra_args);
+/**
+ * Retrieve metadata from a file.
+ *
+ * Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
+ * Each piece of metadata must be on its own line. Fields can not span multiple
+ * lines, the value will get cut at the end of the first line.
+ *
+ * If the file data is not within that first 8kiB, then the author should correct
+ * their plugin file and move the data headers to the top.
+ *
+ * @see http://codex.wordpress.org/File_Header
+ *
+ * @since 2.9.0
+ * @param string $file Path to the file
+ * @param array $default_headers List of headers, in the format array('HeaderKey' => 'Header Name')
+ * @param string $context If specified adds filter hook "extra_{$context}_headers"
+ */
+function get_file_data( $file, $default_headers, $context = '' ) {
+	// We don't need to write to the file, so just open for reading.
+	$fp = fopen( $file, 'r' );
+
+	// Pull only the first 8kiB of the file in.
+	$file_data = fread( $fp, 8192 );
+
+	// PHP will close file handle, but we are good citizens.
+	fclose( $fp );
 
-	merge_filters($tag);
+	// Make sure we catch CR-only line endings.
+	$file_data = str_replace( "\r", "\n", $file_data );
 
-	if ( !isset($wp_filter[$tag]) ) {
-		return;
+	if ( $context && $extra_headers = apply_filters( "extra_{$context}_headers", array() ) ) {
+		$extra_headers = array_combine( $extra_headers, $extra_headers ); // keys equal values
+		$all_headers = array_merge( $extra_headers, (array) $default_headers );
+	} else {
+		$all_headers = $default_headers;
 	}
-	foreach ($wp_filter[$tag] as $priority => $functions) {
-		if ( !is_null($functions) ) {
-			foreach($functions as $function) {
-
-				$function_name = $function['function'];
-				$accepted_args = $function['accepted_args'];
-
-				if ( $accepted_args == 1 ) {
-					if ( is_array($arg) )
-						$the_args = $arg;
-					else
-						$the_args = array($arg);
-				} elseif ( $accepted_args > 1 ) {
-					$the_args = array_slice($args, 0, $accepted_args);
-				} elseif ( $accepted_args == 0 ) {
-					$the_args = NULL;
-				} else {
-					$the_args = $args;
-				}
 
-				$string = call_user_func_array($function_name, $the_args);
-			}
-		}
-	}
+	foreach ( $all_headers as $field => $regex ) {
+		if ( preg_match( '/^[ \t\/*#@]*' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, $match ) && $match[1] )
+			$all_headers[ $field ] = _cleanup_header_comment( $match[1] );
+		else
+			$all_headers[ $field ] = '';
+	}
+
+	return $all_headers;
+}
+
+/**
+ * Used internally to tidy up the search terms.
+ *
+ * @access private
+ * @since 2.9.0
+ *
+ * @param string $t
+ * @return string
+ */
+function _search_terms_tidy($t) {
+	return trim($t, "\"'\n\r ");
+}
+
+/**
+ * Returns true.
+ *
+ * Useful for returning true to filters easily.
+ *
+ * @since 3.0.0
+ * @see __return_false()
+ * @return bool true
+ */
+function __return_true() {
+	return true;
 }
 
-function add_action($tag, $function_to_add, $priority = 10, $accepted_args = 1) {
-	add_filter($tag, $function_to_add, $priority, $accepted_args);
+/**
+ * Returns false.
+ *
+ * Useful for returning false to filters easily.
+ *
+ * @since 3.0.0
+ * @see __return_true()
+ * @return bool false
+ */
+function __return_false() {
+	return false;
 }
 
-function remove_action($tag, $function_to_remove, $priority = 10, $accepted_args = 1) {
-	remove_filter($tag, $function_to_remove, $priority, $accepted_args);
+/**
+ * Returns 0.
+ *
+ * Useful for returning 0 to filters easily.
+ *
+ * @since 3.0.0
+ * @see __return_zero()
+ * @return int 0
+ */
+function __return_zero() {
+	return 0;
 }
 
-function get_page_uri($page_id) {
-	$page = get_page($page_id);
-	$uri = urldecode($page->post_name);
-
-	// A page cannot be it's own parent.
-	if ( $page->post_parent == $page->ID )
-		return $uri;
-
-	while ($page->post_parent != 0) {
-		$page = get_page($page->post_parent);
-		$uri = urldecode($page->post_name) . "/" . $uri;
+/**
+ * Returns an empty array.
+ *
+ * Useful for returning an empty array to filters easily.
+ *
+ * @since 3.0.0
+ * @see __return_zero()
+ * @return array Empty array
+ */
+function __return_empty_array() {
+	return array();
+}
+
+/**
+ * Returns null.
+ *
+ * Useful for returning null to filters easily.
+ *
+ * @since 3.4.0
+ * @return null
+ */
+function __return_null() {
+	return null;
+}
+
+/**
+ * Send a HTTP header to disable content type sniffing in browsers which support it.
+ *
+ * @link http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
+ * @link http://src.chromium.org/viewvc/chrome?view=rev&revision=6985
+ *
+ * @since 3.0.0
+ * @return none
+ */
+function send_nosniff_header() {
+	@header( 'X-Content-Type-Options: nosniff' );
+}
+
+/**
+ * Returns a MySQL expression for selecting the week number based on the start_of_week option.
+ *
+ * @internal
+ * @since 3.0.0
+ * @param string $column
+ * @return string
+ */
+function _wp_mysql_week( $column ) {
+	switch ( $start_of_week = (int) get_option( 'start_of_week' ) ) {
+	default :
+	case 0 :
+		return "WEEK( $column, 0 )";
+	case 1 :
+		return "WEEK( $column, 1 )";
+	case 2 :
+	case 3 :
+	case 4 :
+	case 5 :
+	case 6 :
+		return "WEEK( DATE_SUB( $column, INTERVAL $start_of_week DAY ), 0 )";
+	}
+}
+
+/**
+ * Finds hierarchy loops using a callback function that maps object IDs to parent IDs.
+ *
+ * @since 3.1.0
+ * @access private
+ *
+ * @param callback $callback function that accepts ( ID, $callback_args ) and outputs parent_ID
+ * @param int $start The ID to start the loop check at
+ * @param int $start_parent the parent_ID of $start to use instead of calling $callback( $start ). Use null to always use $callback
+ * @param array $callback_args optional additional arguments to send to $callback
+ * @return array IDs of all members of loop
+ */
+function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
+	$override = is_null( $start_parent ) ? array() : array( $start => $start_parent );
+
+	if ( !$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args ) )
+		return array();
+
+	return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
+}
+
+/**
+ * Uses the "The Tortoise and the Hare" algorithm to detect loops.
+ *
+ * For every step of the algorithm, the hare takes two steps and the tortoise one.
+ * If the hare ever laps the tortoise, there must be a loop.
+ *
+ * @since 3.1.0
+ * @access private
+ *
+ * @param callback $callback function that accepts ( ID, callback_arg, ... ) and outputs parent_ID
+ * @param int $start The ID to start the loop check at
+ * @param array $override an array of ( ID => parent_ID, ... ) to use instead of $callback
+ * @param array $callback_args optional additional arguments to send to $callback
+ * @param bool $_return_loop Return loop members or just detect presence of loop?
+ *             Only set to true if you already know the given $start is part of a loop
+ *             (otherwise the returned array might include branches)
+ * @return mixed scalar ID of some arbitrary member of the loop, or array of IDs of all members of loop if $_return_loop
+ */
+function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) {
+	$tortoise = $hare = $evanescent_hare = $start;
+	$return = array();
+
+	// Set evanescent_hare to one past hare
+	// Increment hare two steps
+	while (
+		$tortoise
+	&&
+		( $evanescent_hare = isset( $override[$hare] ) ? $override[$hare] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) )
+	&&
+		( $hare = isset( $override[$evanescent_hare] ) ? $override[$evanescent_hare] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) )
+	) {
+		if ( $_return_loop )
+			$return[$tortoise] = $return[$evanescent_hare] = $return[$hare] = true;
+
+		// tortoise got lapped - must be a loop
+		if ( $tortoise == $evanescent_hare || $tortoise == $hare )
+			return $_return_loop ? $return : $tortoise;
+
+		// Increment tortoise by one step
+		$tortoise = isset( $override[$tortoise] ) ? $override[$tortoise] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) );
 	}
 
-	return $uri;
-}
-
-function get_posts($args) {
-	global $wpdb;
-	parse_str($args, $r);
-	if ( !isset($r['numberposts']) )
-		$r['numberposts'] = 5;
-	if ( !isset($r['offset']) )
-		$r['offset'] = 0;
-	if ( !isset($r['category']) )
-		$r['category'] = '';
-	if ( !isset($r['orderby']) )
-		$r['orderby'] = 'post_date';
-	if ( !isset($r['order']) )
-		$r['order'] = 'DESC';
-
-	$now = current_time('mysql');
-
-	$posts = $wpdb->get_results(
-		"SELECT DISTINCT * FROM $wpdb->posts " .
-		( empty( $r['category'] ) ? "" : ", $wpdb->post2cat " ) .
-		" WHERE post_date <= '$now' AND (post_status = 'publish') ".
-		( empty( $r['category'] ) ? "" : "AND $wpdb->posts.ID = $wpdb->post2cat.post_id AND $wpdb->post2cat.category_id = " . $r['category']. " " ) .
-		" GROUP BY $wpdb->posts.ID ORDER BY " . $r['orderby'] . " " . $r['order'] . " LIMIT " . $r['offset'] . ',' . $r['numberposts'] );
-
-	update_post_caches($posts);
-
-	return $posts;
+	return false;
 }
 
-function &query_posts($query) {
-	global $wp_query;
-	return $wp_query->query($query);
-}
+/**
+ * Send a HTTP header to limit rendering of pages to same origin iframes.
+ *
+ * @link https://developer.mozilla.org/en/the_x-frame-options_response_header
+ *
+ * @since 3.1.3
+ * @return none
+ */
+function send_frame_options_header() {
+	@header( 'X-Frame-Options: SAMEORIGIN' );
+}
+
+/**
+ * Retrieve a list of protocols to allow in HTML attributes.
+ *
+ * @since 3.3.0
+ * @see wp_kses()
+ * @see esc_url()
+ *
+ * @return array Array of allowed protocols
+ */
+function wp_allowed_protocols() {
+	static $protocols;
+
+	if ( empty( $protocols ) ) {
+		$protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp' );
+		$protocols = apply_filters( 'kses_allowed_protocols', $protocols );
+	}
+
+	return $protocols;
+}
+
+/**
+ * Return a comma separated string of functions that have been called to get to the current point in code.
+ *
+ * @link http://core.trac.wordpress.org/ticket/19589
+ * @since 3.4
+ *
+ * @param string $ignore_class A class to ignore all function calls within - useful when you want to just give info about the callee
+ * @param int $skip_frames A number of stack frames to skip - useful for unwinding back to the source of the issue
+ * @param bool $pretty Whether or not you want a comma separated string or raw array returned
+ * @return string|array Either a string containing a reversed comma separated trace or an array of individual calls.
+ */
+function wp_debug_backtrace_summary( $ignore_class = null, $skip_frames = 0, $pretty = true ) {
+	if ( version_compare( PHP_VERSION, '5.2.5', '>=' ) )
+		$trace = debug_backtrace( false );
+	else
+		$trace = debug_backtrace();
 
-function update_post_cache(&$posts) {
-	global $post_cache;
+	$caller = array();
+	$check_class = ! is_null( $ignore_class );
+	$skip_frames++; // skip this function
 
-	if ( !$posts )
-		return;
+	foreach ( $trace as $call ) {
+		if ( $skip_frames > 0 ) {
+			$skip_frames--;
+		} elseif ( isset( $call['class'] ) ) {
+			if ( $check_class && $ignore_class == $call['class'] )
+				continue; // Filter out calls
 
-	for ($i = 0; $i < count($posts); $i++) {
-		$post_cache[$posts[$i]->ID] = &$posts[$i];
+			$caller[] = "{$call['class']}{$call['type']}{$call['function']}";
+		} else {
+			if ( in_array( $call['function'], array( 'do_action', 'apply_filters' ) ) ) {
+				$caller[] = "{$call['function']}('{$call['args'][0]}')";
+			} elseif ( in_array( $call['function'], array( 'include', 'include_once', 'require', 'require_once' ) ) ) {
+				$caller[] = $call['function'] . "('" . str_replace( array( WP_CONTENT_DIR, ABSPATH ) , '', $call['args'][0] ) . "')";
+			} else {
+				$caller[] = $call['function'];
+			}
+		}
+	}
+	if ( $pretty )
+		return join( ', ', array_reverse( $caller ) );
+	else
+		return $caller;
+}
+
+/**
+ * Retrieve ids that are not already present in the cache
+ *
+ * @since 3.4.0
+ *
+ * @param array $object_ids ID list
+ * @param string $cache_key The cache bucket to check against
+ *
+ * @return array
+ */
+function _get_non_cached_ids( $object_ids, $cache_key ) {
+	$clean = array();
+	foreach ( $object_ids as $id ) {
+		$id = (int) $id;
+		if ( !wp_cache_get( $id, $cache_key ) ) {
+			$clean[] = $id;
+		}
 	}
-}
-
-function clean_post_cache($id) {
-	global $post_cache;
 
-	if ( isset( $post_cache[$id] ) )
-		unset( $post_cache[$id] );
+	return $clean;
 }
 
-function update_page_cache(&$pages) {
-	global $page_cache;
+/**
+ * Test if the current device has the capability to upload files.
+ *
+ * @since 3.4.0
+ * @access private
+ *
+ * @return bool true|false
+ */
+function _device_can_upload() {
+	if ( ! wp_is_mobile() )
+		return true;
 
-	if ( !$pages )
-		return;
+	$ua = $_SERVER['HTTP_USER_AGENT'];
 
-	for ($i = 0; $i < count($pages); $i++) {
-		$page_cache[$pages[$i]->ID] = &$pages[$i];
-		wp_cache_add($pages[$i]->ID, $pages[$i], 'pages');
+	if ( strpos($ua, 'iPhone') !== false
+		|| strpos($ua, 'iPad') !== false
+		|| strpos($ua, 'iPod') !== false ) {
+			return preg_match( '#OS ([\d_]+) like Mac OS X#', $ua, $version ) && version_compare( $version[1], '6', '>=' );
 	}
-}
-
-
-function clean_page_cache($id) {
-	global $page_cache;
 
-	if ( isset( $page_cache[$id] ) )
-		unset( $page_cache[$id] );
+	return true;
 }
 
-function update_post_category_cache($post_ids) {
-	global $wpdb, $category_cache;
-
-	if ( empty($post_ids) )
+/**
+ * Test if a given path is a stream URL
+ *
+ * @param string $path The resource path or URL
+ * @return bool True if the path is a stream URL
+ */
+function wp_is_stream( $path ) {
+	$wrappers = stream_get_wrappers();
+	$wrappers_re = '(' . join('|', $wrappers) . ')';
+
+	return preg_match( "!^$wrappers_re://!", $path ) === 1;
+}
+
+/**
+ * Test if the supplied date is valid for the Gregorian calendar
+ *
+ * @since 3.5.0
+ *
+ * @return bool true|false
+ */
+function wp_checkdate( $month, $day, $year, $source_date ) {
+	return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );
+}
+
+/**
+ * Load the auth check for monitoring whether the user is still logged in.
+ *
+ * Can be disabled with remove_action( 'admin_enqueue_scripts', 'wp_auth_check_load' );
+ *
+ * This is disabled for certain screens where a login screen could cause an
+ * inconvenient interruption. A filter called wp_auth_check_load can be used
+ * for fine-grained control.
+ *
+ * @since 3.6.0
+ */
+function wp_auth_check_load() {
+	if ( ! is_admin() && ! is_user_logged_in() )
 		return;
 
-	if ( is_array($post_ids) )
-		$post_ids = implode(',', $post_ids);
-
-	$dogs = $wpdb->get_results("SELECT post_id, category_id FROM $wpdb->post2cat WHERE post_id IN ($post_ids)");
-
-	if ( empty($dogs) )
+	if ( defined( 'IFRAME_REQUEST' ) )
 		return;
-		
-	foreach ($dogs as $catt)
-		$category_cache[$catt->post_id][$catt->category_id] = &get_category($catt->category_id);
-}
-
-function update_post_caches(&$posts) {
-	global $post_cache, $category_cache, $comment_count_cache, $post_meta_cache;
-	global $wpdb;
 
-	// No point in doing all this work if we didn't match any posts.
-	if ( !$posts )
+	$screen = get_current_screen();
+	$hidden = array( 'update', 'update-network', 'update-core', 'update-core-network', 'upgrade', 'upgrade-network', 'network' );
+	$show = ! in_array( $screen->id, $hidden );
+
+	if ( apply_filters( 'wp_auth_check_load', $show, $screen ) ) {
+		wp_enqueue_style( 'wp-auth-check' );
+		wp_enqueue_script( 'wp-auth-check' );
+
+		add_action( 'admin_print_footer_scripts', 'wp_auth_check_html', 5 );
+		add_action( 'wp_print_footer_scripts', 'wp_auth_check_html', 5 );
+	}
+}
+
+/**
+ * Output the HTML that shows the wp-login dialog when the user is no longer logged in.
+ *
+ * @since 3.6.0
+ */
+function wp_auth_check_html() {
+	$login_url = wp_login_url();
+	$current_domain = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'];
+	$same_domain = ( strpos( $login_url, $current_domain ) === 0 );
+
+	if ( $same_domain && force_ssl_login() && ! force_ssl_admin() )
+		$same_domain = false;
+
+	// Let plugins change this if they know better.
+	$same_domain = apply_filters( 'wp_auth_check_same_domain', $same_domain );
+	$wrap_class = $same_domain ? 'hidden' : 'hidden fallback';
+
+	?>
+	<div id="wp-auth-check-wrap" class="<?php echo $wrap_class; ?>">
+	<div id="wp-auth-check-bg"></div>
+	<div id="wp-auth-check">
+	<div class="wp-auth-check-close" tabindex="0" title="<?php esc_attr_e('Close'); ?>"></div>
+	<?php
+
+	if ( $same_domain ) {
+		?>
+		<div id="wp-auth-check-form" data-src="<?php echo esc_url( add_query_arg( array( 'interim-login' => 1 ), $login_url ) ); ?>"></div>
+		<?php
+	}
+
+	?>
+	<div class="wp-auth-fallback">
+		<p><b class="wp-auth-fallback-expired" tabindex="0"><?php _e('Session expired'); ?></b></p>
+		<p><a href="<?php echo esc_url( $login_url ); ?>" target="_blank"><?php _e('Please log in again.'); ?></a>
+		<?php _e('The login page will open in a new window. After logging in you can close it and return to this page.'); ?></p>
+	</div>
+	</div>
+	</div>
+	<?php
+}
+
+/**
+ * Check whether a user is still logged in, for the heartbeat.
+ *
+ * Send a result that shows a log-in box if the user is no longer logged in,
+ * or if their cookie is within the grace period.
+ *
+ * @since 3.6.0
+ */
+function wp_auth_check( $response, $data ) {
+	$response['wp-auth-check'] = is_user_logged_in() && empty( $GLOBALS['login_grace_period'] );
+	return $response;
+}
+
+/**
+ * Return RegEx body to liberally match an opening HTML tag that:
+ * 1. Is self-closing or
+ * 2. Has no body but has a closing tag of the same name or
+ * 3. Contains a body and a closing tag of the same name
+ *
+ * Note: this RegEx does not balance inner tags and does not attempt to produce valid HTML
+ *
+ * @since 3.6.0
+ *
+ * @param string $tag An HTML tag name. Example: 'video'
+ * @return string
+ */
+function get_tag_regex( $tag ) {
+	if ( empty( $tag ) )
 		return;
-
-	// Get the categories for all the posts
-	for ($i = 0; $i < count($posts); $i++) {
-		$post_id_array[] = $posts[$i]->ID;
-		$post_cache[$posts[$i]->ID] = &$posts[$i];
-		$comment_count_cache[$posts[$i]->ID] = $posts[$i]->comment_count;
-	}
-
-	$post_id_list = implode(',', $post_id_array);
-
-	update_post_category_cache($post_id_list);
-
-	// Get post-meta info
-	if ( $meta_list = $wpdb->get_results("SELECT post_id, meta_key, meta_value FROM $wpdb->postmeta WHERE post_id IN($post_id_list) ORDER BY post_id, meta_key", ARRAY_A) ) {
-		// Change from flat structure to hierarchical:
-		$post_meta_cache = array();
-		foreach ($meta_list as $metarow) {
-			$mpid = $metarow['post_id'];
-			$mkey = $metarow['meta_key'];
-			$mval = $metarow['meta_value'];
-
-			// Force subkeys to be array type:
-			if ( !isset($post_meta_cache[$mpid]) || !is_array($post_meta_cache[$mpid]) )
-				$post_meta_cache[$mpid] = array();
-			if ( !isset($post_meta_cache[$mpid]["$mkey"]) || !is_array($post_meta_cache[$mpid]["$mkey"]) )
-				$post_meta_cache[$mpid]["$mkey"] = array();
-
-			// Add a value to the current pid/key:
-			$post_meta_cache[$mpid][$mkey][] = $mval;
-		}
-	}
-}
-
-function update_category_cache() {
-	return true;
-}
-
-function wp_head() {
-	do_action('wp_head');
-}
-
-function wp_footer() {
-	do_action('wp_footer');
-}
-
-function is_single ($post = '') {
-	global $wp_query;
-
-	if ( !$wp_query->is_single )
-		return false;
-
-	if ( empty( $post) )
-		return true;
-
-	$post_obj = $wp_query->get_queried_object();
-
-	if ( $post == $post_obj->ID )
-		return true;
-	elseif ( $post == $post_obj->post_title )
-		return true;
-	elseif ( $post == $post_obj->post_name )
-		return true;
-
-	return false;
-}
-
-function is_page ($page = '') {
-	global $wp_query;
-
-	if ( !$wp_query->is_page )
-		return false;
-
-	if ( empty($page) )
-		return true;
-
-	$page_obj = $wp_query->get_queried_object();
-
-	if ( $page == $page_obj->ID )
-		return true;
-	elseif ( $page == $page_obj->post_title )
-		return true;
-	else if ( $page == $page_obj->post_name )
-		return true;
-
-	return false;
-}
-
-function is_attachment () {
-	global $wp_query;
-
-	return $wp_query->is_attachment;
-}
-
-function is_preview() {
-	global $wp_query;
-	
-	return $wp_query->is_preview;
-}
-
-function is_archive () {
-	global $wp_query;
-
-	return $wp_query->is_archive;
-}
-
-function is_date () {
-	global $wp_query;
-
-	return $wp_query->is_date;
-}
-
-function is_year () {
-	global $wp_query;
-
-	return $wp_query->is_year;
-}
-
-function is_month () {
-	global $wp_query;
-
-	return $wp_query->is_month;
-}
-
-function is_day () {
-	global $wp_query;
-
-	return $wp_query->is_day;
-}
-
-function is_time () {
-	global $wp_query;
-
-	return $wp_query->is_time;
-}
-
-function is_author ($author = '') {
-	global $wp_query;
-
-	if ( !$wp_query->is_author )
-		return false;
-
-	if ( empty($author) )
-		return true;
-
-	$author_obj = $wp_query->get_queried_object();
-
-	if ( $author == $author_obj->ID )
-		return true;
-	elseif ( $author == $author_obj->nickname )
-		return true;
-	elseif ( $author == $author_obj->user_nicename )
-		return true;
-
-	return false;
-}
-
-function is_category ($category = '') {
-	global $wp_query;
-
-	if ( !$wp_query->is_category )
-		return false;
-
-	if ( empty($category) )
-		return true;
-
-	$cat_obj = $wp_query->get_queried_object();
-
-	if ( $category == $cat_obj->cat_ID )
-		return true;
-	else if ( $category == $cat_obj->cat_name )
-		return true;
-	elseif ( $category == $cat_obj->category_nicename )
-		return true;
-
-	return false;
-}
-
-function is_search () {
-	global $wp_query;
-
-	return $wp_query->is_search;
-}
-
-function is_feed () {
-	global $wp_query;
-
-	return $wp_query->is_feed;
-}
-
-function is_trackback () {
-	global $wp_query;
-
-	return $wp_query->is_trackback;
-}
-
-function is_admin () {
-	global $wp_query;
-
-	return ( $wp_query->is_admin || strstr($_SERVER['REQUEST_URI'], 'wp-admin/') );
-}
-
-function is_home () {
-	global $wp_query;
-
-	return $wp_query->is_home;
-}
-
-function is_404 () {
-	global $wp_query;
-
-	return $wp_query->is_404;
-}
-
-function is_comments_popup () {
-	global $wp_query;
-
-	return $wp_query->is_comments_popup;
-}
-
-function is_paged () {
-	global $wp_query;
-
-	return $wp_query->is_paged;
-}
-
-function in_the_loop() {
-	global $wp_query;
-
-	return $wp_query->in_the_loop;
-}
-
-function get_query_var($var) {
-	global $wp_query;
-
-	return $wp_query->get($var);
-}
-
-function have_posts() {
-	global $wp_query;
-
-	return $wp_query->have_posts();
-}
-
-function rewind_posts() {
-	global $wp_query;
-
-	return $wp_query->rewind_posts();
-}
-
-function the_post() {
-	global $wp_query;
-
-	$wp_query->the_post();
-}
-
-function get_theme_root() {
-	return apply_filters('theme_root', ABSPATH . "wp-content/themes");
-}
-
-function get_theme_root_uri() {
-	return apply_filters('theme_root_uri', get_settings('siteurl') . "/wp-content/themes", get_settings('siteurl'));
-}
-
-function get_stylesheet() {
-	return apply_filters('stylesheet', get_settings('stylesheet'));
-}
-
-function get_stylesheet_directory() {
-	$stylesheet = get_stylesheet();
-	$stylesheet_dir = get_theme_root() . "/$stylesheet";
-	return apply_filters('stylesheet_directory', $stylesheet_dir, $stylesheet);
-}
-
-function get_stylesheet_directory_uri() {
-	$stylesheet = rawurlencode( get_stylesheet() );
-	$stylesheet_dir_uri = get_theme_root_uri() . "/$stylesheet";
-	return apply_filters('stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet);
-}
-
-function get_stylesheet_uri() {
-	$stylesheet_dir_uri = get_stylesheet_directory_uri();
-	$stylesheet_uri = $stylesheet_dir_uri . "/style.css";
-	return apply_filters('stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri);
-}
-
-function get_template() {
-	$template = get_settings('template');
-	if (!file_exists(get_theme_root() . "/$template")) { //works for dirs too
-		update_option('template', 'default');
-		update_option('stylesheet', 'default');
-	}
-	return apply_filters('template', get_settings('template'));
-}
-
-function get_template_directory() {
-	$template = get_template();
-	$template_dir = get_theme_root() . "/$template";
-	return apply_filters('template_directory', $template_dir, $template);
-}
-
-function get_template_directory_uri() {
-	$template = get_template();
-	$template_dir_uri = get_theme_root_uri() . "/$template";
-	return apply_filters('template_directory_uri', $template_dir_uri, $template);
-}
-
-function get_theme_data($theme_file) {
-	$theme_data = implode('', file($theme_file));
-	preg_match("|Theme Name:(.*)|i", $theme_data, $theme_name);
-	preg_match("|Theme URI:(.*)|i", $theme_data, $theme_uri);
-	preg_match("|Description:(.*)|i", $theme_data, $description);
-	preg_match("|Author:(.*)|i", $theme_data, $author_name);
-	preg_match("|Author URI:(.*)|i", $theme_data, $author_uri);
-	preg_match("|Template:(.*)|i", $theme_data, $template);
-	if ( preg_match("|Version:(.*)|i", $theme_data, $version) )
-		$version = $version[1];
-	else
-		$version ='';
-	if ( preg_match("|Status:(.*)|i", $theme_data, $status) )
-		$status = $status[1];
-	else
-		$status ='publish';
-
-	$description = wptexturize($description[1]);
-
-	$name = $theme_name[1];
-	$name = trim($name);
-	$theme = $name;
-
-	if ( '' == $author_uri[1] ) {
-		$author = $author_name[1];
-	} else {
-		$author = '<a href="' . $author_uri[1] . '" title="' . __('Visit author homepage') . '">' . $author_name[1] . '</a>';
-	}
-
-	return array('Name' => $name, 'Title' => $theme, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template[1], 'Status' => $status);
-}
-
-function get_themes() {
-	global $wp_themes;
-	global $wp_broken_themes;
-
-	if ( isset($wp_themes) )
-		return $wp_themes;
-
-	$themes = array();
-	$wp_broken_themes = array();
-	$theme_root = get_theme_root();
-	$theme_loc = str_replace(ABSPATH, '', $theme_root);
-
-	// Files in wp-content/themes directory
-	$themes_dir = @ dir($theme_root);
-	if ( $themes_dir ) {
-		while(($theme_dir = $themes_dir->read()) !== false) {
-			if ( is_dir($theme_root . '/' . $theme_dir) && is_readable($theme_root . '/' . $theme_dir) ) {
-				if ( $theme_dir{0} == '.' || $theme_dir == '..' || $theme_dir == 'CVS' ) {
-					continue;
-				}
-				$stylish_dir = @ dir($theme_root . '/' . $theme_dir);
-				$found_stylesheet = false;
-				while (($theme_file = $stylish_dir->read()) !== false) {
-					if ( $theme_file == 'style.css' ) {
-						$theme_files[] = $theme_dir . '/' . $theme_file;
-						$found_stylesheet = true;
-						break;
-					}
-				}
-				if ( !$found_stylesheet ) {
-					$wp_broken_themes[$theme_dir] = array('Name' => $theme_dir, 'Title' => $theme_dir, 'Description' => __('Stylesheet is missing.'));
-				}
-			}
-		}
-	}
-
-	if ( !$themes_dir || !$theme_files ) {
-		return $themes;
-	}
-
-	sort($theme_files);
-
-	foreach($theme_files as $theme_file) {
-		if ( ! is_readable("$theme_root/$theme_file") ) {
-			$wp_broken_themes[$theme_file] = array('Name' => $theme_file, 'Title' => $theme_file, 'Description' => __('File not readable.'));
-			continue;
-		}
-
-		$theme_data = get_theme_data("$theme_root/$theme_file");
-
-		$name = $theme_data['Name'];
-		$title = $theme_data['Title'];
-		$description = wptexturize($theme_data['Description']);
-		$version = $theme_data['Version'];
-		$author = $theme_data['Author'];
-		$template = $theme_data['Template'];
-		$stylesheet = dirname($theme_file);
-
-		foreach (array('png', 'gif', 'jpg', 'jpeg') as $ext) {
-			if (file_exists("$theme_root/$stylesheet/screenshot.$ext")) {
-				$screenshot = "screenshot.$ext";
-				break;
-			}
-		}
-
-		if ( empty($name) ) {
-			$name = dirname($theme_file);
-			$title = $name;
-		}
-
-		if ( empty($template) ) {
-			if ( file_exists(dirname("$theme_root/$theme_file/index.php")) ) {
-				$template = dirname($theme_file);
-			} else {
-				continue;
-			}
-		}
-
-		$template = trim($template);
-
-		if ( !file_exists("$theme_root/$template/index.php") ) {
-			$wp_broken_themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => __('Template is missing.'));
-			continue;
-		}
-
-		$stylesheet_files = array();
-		$stylesheet_dir = @ dir("$theme_root/$stylesheet");
-		if ( $stylesheet_dir ) {
-			while(($file = $stylesheet_dir->read()) !== false) {
-				if ( !preg_match('|^\.+$|', $file) && preg_match('|\.css$|', $file) )
-					$stylesheet_files[] = "$theme_loc/$stylesheet/$file";
-			}
-		}
-
-		$template_files = array();
-		$template_dir = @ dir("$theme_root/$template");
-		if ( $template_dir ) {
-			while(($file = $template_dir->read()) !== false) {
-				if ( !preg_match('|^\.+$|', $file) && preg_match('|\.php$|', $file) )
-					$template_files[] = "$theme_loc/$template/$file";
-			}
-		}
-
-		$template_dir = dirname($template_files[0]);
-		$stylesheet_dir = dirname($stylesheet_files[0]);
-
-		if ( empty($template_dir) )
-			$template_dir = '/';
-		if ( empty($stylesheet_dir) )
-			$stylesheet_dir = '/';
-
-		// Check for theme name collision.  This occurs if a theme is copied to
-		// a new theme directory and the theme header is not updated.  Whichever
-		// theme is first keeps the name.  Subsequent themes get a suffix applied.
-		// The Default and Classic themes always trump their pretenders.
-		if ( isset($themes[$name]) ) {
-			if ( ('WordPress Default' == $name || 'WordPress Classic' == $name) &&
-					 ('default' == $stylesheet || 'classic' == $stylesheet) ) {
-				// If another theme has claimed to be one of our default themes, move
-				// them aside.
-				$suffix = $themes[$name]['Stylesheet'];
-				$new_name = "$name/$suffix";
-				$themes[$new_name] = $themes[$name];
-				$themes[$new_name]['Name'] = $new_name;
-			} else {
-				$name = "$name/$stylesheet";
-			}
-		}
-
-		$themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template, 'Stylesheet' => $stylesheet, 'Template Files' => $template_files, 'Stylesheet Files' => $stylesheet_files, 'Template Dir' => $template_dir, 'Stylesheet Dir' => $stylesheet_dir, 'Status' => $theme_data['Status'], 'Screenshot' => $screenshot);
-	}
-
-	// Resolve theme dependencies.
-	$theme_names = array_keys($themes);
-
-	foreach ($theme_names as $theme_name) {
-		$themes[$theme_name]['Parent Theme'] = '';
-		if ( $themes[$theme_name]['Stylesheet'] != $themes[$theme_name]['Template'] ) {
-			foreach ($theme_names as $parent_theme_name) {
-				if ( ($themes[$parent_theme_name]['Stylesheet'] == $themes[$parent_theme_name]['Template']) && ($themes[$parent_theme_name]['Template'] == $themes[$theme_name]['Template']) ) {
-					$themes[$theme_name]['Parent Theme'] = $themes[$parent_theme_name]['Name'];
-					break;
-				}
-			}
-		}
-	}
-
-	$wp_themes = $themes;
-
-	return $themes;
+	return sprintf( '<%1$s[^<]*(?:>[\s\S]*<\/%1$s>|\s*\/>)', tag_escape( $tag ) );
+}
+
+/**
+ * Return a canonical form of the provided charset appropriate for passing to PHP
+ * functions such as htmlspecialchars() and charset html attributes.
+ *
+ * @link http://core.trac.wordpress.org/ticket/23688
+ * @since 3.6.0
+ *
+ * @param string A charset name
+ * @return string The canonical form of the charset
+ */
+function _canonical_charset( $charset ) {
+	if ( 'UTF-8' === $charset || 'utf-8' === $charset || 'utf8' === $charset ||
+		'UTF8' === $charset )
+		return 'UTF-8';
+
+	if ( 'ISO-8859-1' === $charset || 'iso-8859-1' === $charset ||
+		'iso8859-1' === $charset || 'ISO8859-1' === $charset )
+		return 'ISO-8859-1';
+
+	return $charset;
 }
-
-function get_theme($theme) {
-	$themes = get_themes();
-
-	if ( array_key_exists($theme, $themes) )
-		return $themes[$theme];
-
-	return NULL;
-}
-
-function get_current_theme() {
-	$themes = get_themes();
-	$theme_names = array_keys($themes);
-	$current_template = get_settings('template');
-	$current_stylesheet = get_settings('stylesheet');
-	$current_theme = 'WordPress Default';
-
-	if ( $themes ) {
-		foreach ($theme_names as $theme_name) {
-			if ( $themes[$theme_name]['Stylesheet'] == $current_stylesheet &&
-					$themes[$theme_name]['Template'] == $current_template ) {
-				$current_theme = $themes[$theme_name]['Name'];
-				break;
-			}
-		}
-	}
-
-	return $current_theme;
-}
-
-function get_query_template($type) {
-	$template = '';
-	if ( file_exists(TEMPLATEPATH . "/{$type}.php") )
-		$template = TEMPLATEPATH . "/{$type}.php";
-
-	return apply_filters("{$type}_template", $template);
-}
-
-function get_404_template() {
-	return get_query_template('404');
-}
-
-function get_archive_template() {
-	return get_query_template('archive');
-}
-
-function get_author_template() {
-	return get_query_template('author');
-}
-
-function get_category_template() {
-	$template = '';
-	if ( file_exists(TEMPLATEPATH . "/category-" . get_query_var('cat') . '.php') )
-		$template = TEMPLATEPATH . "/category-" . get_query_var('cat') . '.php';
-	else if ( file_exists(TEMPLATEPATH . "/category.php") )
-		$template = TEMPLATEPATH . "/category.php";
-
-	return apply_filters('category_template', $template);
-}
-
-function get_date_template() {
-	return get_query_template('date');
-}
-
-function get_home_template() {
-	$template = '';
-
-	if ( file_exists(TEMPLATEPATH . "/home.php") )
-		$template = TEMPLATEPATH . "/home.php";
-	else if ( file_exists(TEMPLATEPATH . "/index.php") )
-		$template = TEMPLATEPATH . "/index.php";
-
-	return apply_filters('home_template', $template);
-}
-
-function get_page_template() {
-	global $wp_query;
-
-	$id = $wp_query->post->ID;
-	$template = get_post_meta($id, '_wp_page_template', true);
-
-	if ( 'default' == $template )
-		$template = '';
-
-	if ( ! empty($template) && file_exists(TEMPLATEPATH . "/$template") )
-		$template = TEMPLATEPATH . "/$template";
-	else if ( file_exists(TEMPLATEPATH . "/page.php") )
-		$template = TEMPLATEPATH . "/page.php";
-	else
-		$template = '';
-
-	return apply_filters('page_template', $template);
-}
-
-function get_paged_template() {
-	return get_query_template('paged');
-}
-
-function get_search_template() {
-	return get_query_template('search');
-}
-
-function get_single_template() {
-	return get_query_template('single');
-}
-
-function get_attachment_template() {
-	global $posts;
-	$type = explode('/', $posts[0]->post_mime_type);
-	if ( $template = get_query_template($type[0]) )
-		return $template;
-	elseif ( $template = get_query_template($type[1]) )
-		return $template;
-	elseif ( $template = get_query_template("$type[0]_$type[1]") )
-		return $template;
-	else
-		return get_query_template('attachment');
-}
-
-function get_comments_popup_template() {
-	if ( file_exists( TEMPLATEPATH . '/comments-popup.php') )
-		$template = TEMPLATEPATH . '/comments-popup.php';
-	else
-		$template = get_theme_root() . '/default/comments-popup.php';
-
-	return apply_filters('comments_popup_template', $template);
-}
-
-// Borrowed from the PHP Manual user notes. Convert entities, while
-// preserving already-encoded entities:
-function htmlentities2($myHTML) {
-	$translation_table=get_html_translation_table (HTML_ENTITIES,ENT_QUOTES);
-	$translation_table[chr(38)] = '&';
-	return preg_replace("/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/","&amp;" , strtr($myHTML, $translation_table));
-}
-
-
-function is_plugin_page() {
-	global $plugin_page;
-
-	if ( isset($plugin_page) )
-		return true;
-
-	return false;
-}
-
-/*
-add_query_arg: Returns a modified querystring by adding
-a single key & value or an associative array.
-Setting a key value to emptystring removes the key.
-Omitting oldquery_or_uri uses the $_SERVER value.
-
-Parameters:
-add_query_arg(newkey, newvalue, oldquery_or_uri) or
-add_query_arg(associative_array, oldquery_or_uri)
-*/
-function add_query_arg() {
-	$ret = '';
-	if ( is_array(func_get_arg(0)) ) {
-		if ( @func_num_args() < 2 )
-			$uri = $_SERVER['REQUEST_URI'];
-		else
-			$uri = @func_get_arg(1);
-	} else {
-		if ( @func_num_args() < 3 )
-			$uri = $_SERVER['REQUEST_URI'];
-		else
-			$uri = @func_get_arg(2);
-	}
-
-	if ( strstr($uri, '?') ) {
-		$parts = explode('?', $uri, 2);
-		if ( 1 == count($parts) ) {
-			$base = '?';
-			$query = $parts[0];
-		} else {
-			$base = $parts[0] . '?';
-			$query = $parts[1];
-		}
-	}
-	else if ( strstr($uri, '/') ) {
-		$base = $uri . '?';
-		$query = '';
-	} else {
-		$base = '';
-		$query = $uri;
-	}
-
-	parse_str($query, $qs);
-	if ( is_array(func_get_arg(0)) ) {
-		$kayvees = func_get_arg(0);
-		$qs = array_merge($qs, $kayvees);
-	} else {
-		$qs[func_get_arg(0)] = func_get_arg(1);
-	}
-
-	foreach($qs as $k => $v) {
-		if ( $v != '' ) {
-			if ( $ret != '' )
-				$ret .= '&';
-			$ret .= "$k=$v";
-		}
-	}
-	$ret = $base . $ret;
-	return trim($ret, '?');
-}
-
-function remove_query_arg($key, $query) {
-	return add_query_arg($key, '', $query);
-}
-
-function load_template($file) {
-	global $posts, $post, $wp_did_header, $wp_did_template_redirect, $wp_query,
-		$wp_rewrite, $wpdb;
-
-	extract($wp_query->query_vars);
-
-	require_once($file);
-}
-
-function add_magic_quotes($array) {
-	global $wpdb;
-
-	foreach ($array as $k => $v) {
-		if ( is_array($v) ) {
-			$array[$k] = add_magic_quotes($v);
-		} else {
-			$array[$k] = $wpdb->escape($v);
-		}
-	}
-	return $array;
-}
-
-function wp_remote_fopen( $uri ) {
-	if ( ini_get('allow_url_fopen') ) {
-		$fp = fopen( $uri, 'r' );
-		if ( !$fp )
-			return false;
-		$linea = '';
-		while( $remote_read = fread($fp, 4096) )
-			$linea .= $remote_read;
-		fclose($fp);
-		return $linea;
-	} else if ( function_exists('curl_init') ) {
-		$handle = curl_init();
-		curl_setopt ($handle, CURLOPT_URL, $uri);
-		curl_setopt ($handle, CURLOPT_CONNECTTIMEOUT, 1);
-		curl_setopt ($handle, CURLOPT_RETURNTRANSFER, 1);
-		$buffer = curl_exec($handle);
-		curl_close($handle);
-		return $buffer;
-	} else {
-		return false;
-	}
-}
-
-function wp($query_vars = '') {
-	global $wp;
-	
-	$wp->main($query_vars);
-}
-
-function status_header( $header ) {
-	if ( 200 == $header )
-		$text = 'OK';
-	elseif ( 301 == $header )
-		$text = 'Moved Permanently';
-	elseif ( 302 == $header )
-		$text = 'Moved Temporarily';
-	elseif ( 304 == $header )
-		$text = 'Not Modified';
-	elseif ( 404 == $header )
-		$text = 'Not Found';
-	elseif ( 410 == $header )
-		$text = 'Gone';
-
-	@header("HTTP/1.1 $header $text");
-	@header("Status: $header $text");
-}
-
-function nocache_headers() {
-	@ header('Expires: Wed, 11 Jan 1984 05:00:00 GMT');
-	@ header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
-	@ header('Cache-Control: no-cache, must-revalidate, max-age=0');
-	@ header('Pragma: no-cache');
-}
-
-function get_usermeta( $user_id, $meta_key = '') {
-	global $wpdb;
-	$user_id = (int) $user_id;
-
-	if ( !empty($meta_key) ) {
-		$meta_key = preg_replace('|a-z0-9_|i', '', $meta_key);
-		$metas = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->usermeta WHERE user_id = '$user_id' AND meta_key = '$meta_key'");
-	} else {
-		$metas = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->usermeta WHERE user_id = '$user_id'");
-	}
-
-	if ( empty($metas) ) {
-		if ( empty($meta_key) )
-			return array();
-		else
-			return '';
-	}
-
-	foreach ($metas as $index => $meta) {
-		@ $value = unserialize($meta->meta_value);
-		if ( $value === FALSE )
-			$value = $meta->meta_value;
-
-		$values[] = $value;
-	}
-
-	if ( count($values) == 1 )
-		return $values[0];
-	else
-		return $values;
-}
-
-function update_usermeta( $user_id, $meta_key, $meta_value ) {
-	global $wpdb;
-	if ( !is_numeric( $user_id ) )
-		return false;
-	$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);
-
-	if ( is_array($meta_value) || is_object($meta_value) )
-		$meta_value = serialize($meta_value);
-	$meta_value = trim( $meta_value );
-	
-	if (empty($meta_value)) {
-		delete_usermeta($user_id, $meta_key);
-	}
-
-	$cur = $wpdb->get_row("SELECT * FROM $wpdb->usermeta WHERE user_id = '$user_id' AND meta_key = '$meta_key'");
-	if ( !$cur ) {
-		$wpdb->query("INSERT INTO $wpdb->usermeta ( user_id, meta_key, meta_value )
-		VALUES
-		( '$user_id', '$meta_key', '$meta_value' )");
-	} else if ( $cur->meta_value != $meta_value ) {
-		$wpdb->query("UPDATE $wpdb->usermeta SET meta_value = '$meta_value' WHERE user_id = '$user_id' AND meta_key = '$meta_key'");
-	} else {
-		return false;	
-	}
-	
-	$user = get_userdata($user_id);
-	wp_cache_delete($user_id, 'users');
-	wp_cache_delete($user->user_login, 'userlogins');
-	
-	return true;
-}
-
-function delete_usermeta( $user_id, $meta_key, $meta_value = '' ) {
-	global $wpdb;
-	if ( !is_numeric( $user_id ) )
-		return false;
-	$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);
-
-	if ( is_array($meta_value) || is_object($meta_value) )
-		$meta_value = serialize($meta_value);
-	$meta_value = trim( $meta_value );
-
-	if ( ! empty($meta_value) )
-		$wpdb->query("DELETE FROM $wpdb->usermeta WHERE user_id = '$user_id' AND meta_key = '$meta_key' AND meta_value = '$meta_value'");
-	else
-		$wpdb->query("DELETE FROM $wpdb->usermeta WHERE user_id = '$user_id' AND meta_key = '$meta_key'");
-		
-	$user = get_userdata($user_id);
-	wp_cache_delete($user_id, 'users');
-	wp_cache_delete($user->user_login, 'userlogins');
-	
-	return true;
-}
-
-function register_activation_hook($file, $function) {
-	$file = plugin_basename($file);
-
-	add_action('activate_' . $file, $function);
-}
-
-function register_deactivation_hook($file, $function) {
-	$file = plugin_basename($file);
-
-	add_action('deactivate_' . $file, $function);
-}
-
-function plugin_basename($file) {
-	$file = preg_replace('|\\\\+|', '\\\\', $file);
-	$file = preg_replace('/^.*wp-content[\\\\\/]plugins[\\\\\/]/', '', $file);
-	return $file;
-}
-
-function get_num_queries() {
-	global $wpdb;
-	return $wpdb->num_queries;
-}
-
-?>