X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/7688c6ba71852cd89123b62b2d57683535e4702a..refs/tags/wordpress-3.4:/wp-includes/functions.php?ds=sidebyside diff --git a/wp-includes/functions.php b/wp-includes/functions.php index c07069c1..24e1a29c 100644 --- a/wp-includes/functions.php +++ b/wp-includes/functions.php @@ -1,495 +1,419 @@ month) && !empty($wp_locale->weekday) && $translate ) { - $datemonth = $wp_locale->get_month(date('m', $i)); - $datemonth_abbrev = $wp_locale->get_month_abbrev($datemonth); - $dateweekday = $wp_locale->get_weekday(date('w', $i)); - $dateweekday_abbrev = $wp_locale->get_weekday_abbrev($dateweekday); - $datemeridiem = $wp_locale->get_meridiem(date('a', $i)); - $datemeridiem_capital = $wp_locale->get_meridiem(date('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 = preg_replace("/([^\\\])a/", "\\1".backslashit($datemeridiem), $dateformatstring); - $dateformatstring = preg_replace("/([^\\\])A/", "\\1".backslashit($datemeridiem_capital), $dateformatstring); + $i = strtotime( $date ); - $dateformatstring = substr($dateformatstring, 1, strlen($dateformatstring)-1); - } - $j = @date($dateformatstring, $i); - if ( !$j ) { - // for debug purposes - // echo $i." ".$mysqlstring; - } - return $j; -} + if ( 'U' == $format ) + return $i; -function current_time($type, $gmt = 0) { - switch ($type) { + 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_option('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' ) * 3600 ) ) ); break; case 'timestamp': - if ( $gmt ) $d = time(); - else $d = time() + (get_option('gmt_offset') * 3600); - return $d; + return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * 3600 ); break; } } -function date_i18n($dateformatstring, $unixtimestamp) { +/** + * 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 = $unixtimestamp; - if ( (!empty($wp_locale->month)) && (!empty($wp_locale->weekday)) ) { - $datemonth = $wp_locale->get_month(date('m', $i)); - $datemonth_abbrev = $wp_locale->get_month_abbrev($datemonth); - $dateweekday = $wp_locale->get_weekday(date('w', $i)); - $dateweekday_abbrev = $wp_locale->get_weekday_abbrev($dateweekday); - $datemeridiem = $wp_locale->get_meridiem(date('a', $i)); - $datemeridiem_capital = $wp_locale->get_meridiem(date('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 = preg_replace("/([^\\\])a/", "\\1".backslashit($datemeridiem), $dateformatstring); - $dateformatstring = preg_replace("/([^\\\])A/", "\\1".backslashit($datemeridiem_capital), $dateformatstring); - $dateformatstring = substr($dateformatstring, 1, strlen($dateformatstring)-1); + 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; } - $j = @date($dateformatstring, $i); - return $j; -} -function number_format_i18n($number, $decimals = null) { - global $wp_locale; - // let the user override the precision only - $decimals = is_null($decimals)? $wp_locale->number_format['decimals'] : intval($decimals); + // store original value for language with untypical grammars + // see http://core.trac.wordpress.org/ticket/9396 + $req_format = $dateformatstring; - return number_format($number, $decimals, $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep']); + $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 = 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 ); + } + } + } + } + $j = @$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 $j; } -function size_format($bytes, $decimals = null) { - // technically the correct unit names for powers of 1024 are KiB, MiB etc - // see http://en.wikipedia.org/wiki/Byte +/** + * 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( - 'TB' => pow(1024, 4), - 'GB' => pow(1024, 3), - 'MB' => pow(1024, 2), - 'kB' => pow(1024, 1), - 'B' => pow(1024, 0), + // ========================= 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 ) . ' ' . $unit; - foreach ($quant as $unit => $mag) - if ( intval($bytes) >= $mag ) - return number_format_i18n($bytes / $mag, $decimals) . ' ' . $unit; -} - -function get_weekstartend($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_option('start_of_week') ) - $weekday = 7 - (get_option('start_of_week') - $weekday); - - while ($weekday > get_option('start_of_week')) { - $weekday = date('w',$day); - if ( $weekday < get_option('start_of_week') ) - $weekday = 7 - (get_option('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 $week; + return false; } -function maybe_unserialize($original) { - if ( is_serialized($original) ) // don't attempt to unserialize data that wasn't serialized going in - if ( false !== $gm = @ unserialize($original) ) - return $gm; +/** + * 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 - 86400 * ( $weekday - $start_of_week ); // The most recent week start day on or before $day + $end = $start + 604799; // $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 $original; } -function is_serialized($data) { +/** + * 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. + * @return bool False if not serialized and true if it was. + */ +function is_serialized( $data ) { // if it isn't a string, it isn't serialized - if ( !is_string($data) ) + if ( ! is_string( $data ) ) return false; - $data = trim($data); - if ( 'N;' == $data ) + $data = trim( $data ); + if ( 'N;' == $data ) return true; - if ( !preg_match('/^([adObis]):/', $data, $badions) ) + $length = strlen( $data ); + if ( $length < 4 ) return false; - switch ( $badions[1] ) : - case 'a' : - case 'O' : - case 's' : - if ( preg_match("/^{$badions[1]}:[0-9]+:.*[;}]\$/s", $data) ) - return true; - break; - case 'b' : - case 'i' : - case 'd' : - if ( preg_match("/^{$badions[1]}:[0-9.E-]+;\$/", $data) ) - return true; - break; - endswitch; - return false; -} - -function is_serialized_string($data) { - // if it isn't a string, it isn't a serialized string - if ( !is_string($data) ) + if ( ':' !== $data[1] ) return false; - $data = trim($data); - if ( preg_match('/^s:[0-9]+:.*;$/s',$data) ) // this should fetch all serialized strings - return true; - return false; -} - -/* Options functions */ - -// expects $setting to already be SQL-escaped -function get_option($setting) { - global $wpdb; - - // Allow plugins to short-circuit options. - $pre = apply_filters( 'pre_option_' . $setting, false ); - if ( false !== $pre ) - return $pre; - - // prevent non-existent options from triggering multiple queries - $notoptions = wp_cache_get('notoptions', 'options'); - if ( isset($notoptions[$setting]) ) + $lastc = $data[$length-1]; + if ( ';' !== $lastc && '}' !== $lastc ) return false; - - $alloptions = wp_load_alloptions(); - - if ( isset($alloptions[$setting]) ) { - $value = $alloptions[$setting]; - } else { - $value = wp_cache_get($setting, 'options'); - - if ( false === $value ) { - if ( defined('WP_INSTALLING') ) - $show = $wpdb->hide_errors(); - $row = $wpdb->get_row("SELECT option_value FROM $wpdb->options WHERE option_name = '$setting' LIMIT 1"); - if ( defined('WP_INSTALLING') ) - $wpdb->show_errors($show); - - if( is_object( $row) ) { // Has to be get_row instead of get_var because of funkiness with 0, false, null values - $value = $row->option_value; - wp_cache_add($setting, $value, 'options'); - } else { // option does not exist, so we must cache its non-existence - $notoptions[$setting] = true; - wp_cache_set('notoptions', $notoptions, 'options'); + $token = $data[0]; + switch ( $token ) { + case 's' : + if ( '"' !== $data[$length-2] ) return false; - } - } - } - - // If home is not set use siteurl. - if ( 'home' == $setting && '' == $value ) - return get_option('siteurl'); - - if ( in_array($setting, array('siteurl', 'home', 'category_base', 'tag_base')) ) - $value = untrailingslashit($value); - - return apply_filters( 'option_' . $setting, maybe_unserialize($value) ); -} - -function wp_protect_special_option($option) { - $protected = array('alloptions', 'notoptions'); - if ( in_array($option, $protected) ) - die(sprintf(__('%s is a protected WP option and may not be modified'), wp_specialchars($option))); -} - -function form_option($option) { - echo attribute_escape(get_option($option)); -} - -function get_alloptions() { - global $wpdb, $wp_queries; - $show = $wpdb->hide_errors(); - if ( !$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"); - } - $wpdb->show_errors($show); - - 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, $value); + case 'a' : + case 'O' : + return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data ); + case 'b' : + case 'i' : + case 'd' : + return (bool) preg_match( "/^{$token}:[0-9.E-]+;\$/", $data ); } - return apply_filters('all_options', $all_options); -} - -function wp_load_alloptions() { - global $wpdb; - - $alloptions = wp_cache_get('alloptions', 'options'); - - if ( !$alloptions ) { - $show = $wpdb->hide_errors(); - if ( !$alloptions_db = $wpdb->get_results("SELECT option_name, option_value FROM $wpdb->options WHERE autoload = 'yes'") ) - $alloptions_db = $wpdb->get_results("SELECT option_name, option_value FROM $wpdb->options"); - $wpdb->show_errors($show); - $alloptions = array(); - foreach ( (array) $alloptions_db as $o ) - $alloptions[$o->option_name] = $o->option_value; - wp_cache_add('alloptions', $alloptions, 'options'); - } - return $alloptions; + return false; } -// expects $option_name to NOT be SQL-escaped -function update_option($option_name, $newvalue) { - global $wpdb; - - wp_protect_special_option($option_name); - - $safe_option_name = $wpdb->escape($option_name); - $newvalue = sanitize_option($option_name, $newvalue); - - if ( is_string($newvalue) ) - $newvalue = trim($newvalue); - - // If the new and old values are the same, no need to update. - $oldvalue = get_option($safe_option_name); - if ( $newvalue === $oldvalue ) { +/** + * 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; - } - - if ( false === $oldvalue ) { - add_option($option_name, $newvalue); - return true; - } - - $notoptions = wp_cache_get('notoptions', 'options'); - if ( is_array($notoptions) && isset($notoptions[$option_name]) ) { - unset($notoptions[$option_name]); - wp_cache_set('notoptions', $notoptions, 'options'); - } - - $_newvalue = $newvalue; - $newvalue = maybe_serialize($newvalue); - - $alloptions = wp_load_alloptions(); - if ( isset($alloptions[$option_name]) ) { - $alloptions[$option_name] = $newvalue; - wp_cache_set('alloptions', $alloptions, 'options'); - } else { - wp_cache_set($option_name, $newvalue, 'options'); - } - - $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); + $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; - } - return false; } -// thx Alex Stapleton, http://alex.vort-x.net/blog/ -// expects $name to NOT be SQL-escaped -function add_option($name, $value = '', $deprecated = '', $autoload = 'yes') { - global $wpdb; - - wp_protect_special_option($name); - $safe_name = $wpdb->escape($name); - - // Make sure the option doesn't already exist. We can check the 'notoptions' cache before we ask for a db query - $notoptions = wp_cache_get('notoptions', 'options'); - if ( !is_array($notoptions) || !isset($notoptions[$name]) ) - if ( false !== get_option($safe_name) ) - return; - - $value = maybe_serialize($value); - $autoload = ( 'no' === $autoload ) ? 'no' : 'yes'; - - if ( 'yes' == $autoload ) { - $alloptions = wp_load_alloptions(); - $alloptions[$name] = $value; - wp_cache_set('alloptions', $alloptions, 'options'); - } else { - wp_cache_set($name, $value, 'options'); - } - - // This option exists now - $notoptions = wp_cache_get('notoptions', 'options'); // yes, again... we need it to be fresh - if ( is_array($notoptions) && isset($notoptions[$name]) ) { - unset($notoptions[$name]); - wp_cache_set('notoptions', $notoptions, 'options'); - } - - $name = $wpdb->escape($name); - $value = $wpdb->escape($value); - $wpdb->query("INSERT INTO $wpdb->options (option_name, option_value, autoload) VALUES ('$name', '$value', '$autoload')"); - - return; -} - -function delete_option($name) { - global $wpdb; - - wp_protect_special_option($name); +/** + * 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 ); - // Get the ID, if no ID then return - $option = $wpdb->get_row("SELECT option_id, autoload FROM $wpdb->options WHERE option_name = '$name'"); - if ( !$option->option_id ) return false; - $wpdb->query("DELETE FROM $wpdb->options WHERE option_name = '$name'"); - if ( 'yes' == $option->autoload ) { - $alloptions = wp_load_alloptions(); - if ( isset($alloptions[$name]) ) { - unset($alloptions[$name]); - wp_cache_set('alloptions', $alloptions, 'options'); - } - } else { - wp_cache_delete($name, 'options'); - } - return true; -} + // Double serialization is required for backward compatibility. + // See http://core.trac.wordpress.org/ticket/12930 + if ( is_serialized( $data ) ) + return serialize( $data ); -function maybe_serialize($data) { - if ( is_string($data) ) - $data = trim($data); - elseif ( is_array($data) || is_object($data) ) - return serialize($data); - if ( is_serialized($data) ) - return serialize($data); return $data; } -function gzip_compression() { - if ( !get_option( 'gzipcompression' ) ) { - return false; - } - - if ( ( ini_get( 'zlib.output_compression' ) == 'On' || ini_get( 'zlib.output_compression_level' ) > 0 ) || ini_get( 'output_handler' ) == 'ob_gzhandler' ) { - return false; - } - - if ( extension_loaded( 'zlib' ) ) { - ob_start( 'ob_gzhandler' ); - } -} - -function make_url_footnote($content) { - preg_match_all('/(.+?)<\/a>/', $content, $matches); - $j = 0; - for ($i=0; $i(.+?)<\/title>/is', $content, $matchtitle) ) { - $post_title = $matchtitle[0]; - $post_title = preg_replace('//si', '', $post_title); - $post_title = preg_replace('/<\/title>/si', '', $post_title); + if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) { + $post_title = $matchtitle[1]; } else { $post_title = $post_default_title; } return $post_title; } -function xmlrpc_getpostcategory($content) { +/** + * 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); + if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) { + $post_category = trim( $matchcat[1], ',' ); + $post_category = explode( ',', $post_category ); } else { $post_category = $post_default_category; } return $post_category; } -function xmlrpc_removepostdata($content) { - $content = preg_replace('/<title>(.+?)<\/title>/si', '', $content); - $content = preg_replace('/<category>(.+?)<\/category>/si', '', $content); - $content = trim($content); +/** + * 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 $content; } -function debug_fopen($filename, $mode) { - global $debug; - if ( $debug == 1 ) { - $fp = fopen($filename, $mode); - return $fp; - } else { - return false; - } -} - -function debug_fwrite($fp, $string) { - global $debug; - if ( $debug == 1 ) { - fwrite($fp, $string); - } -} - -function debug_fclose($fp) { - global $debug; - if ( $debug == 1 ) { - fclose($fp); - } -} - +/** + * 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 $wp_version, $wpdb; - include_once (ABSPATH . WPINC . '/class-IXR.php'); + global $wpdb; + + //TODO: Tidy this ghetto code up and make the debug code optional + 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 ); @@ -498,137 +422,255 @@ function do_enclose( $content, $post_ID ) { $punc = '.:?\-'; $any = $ltrs . $gunk . $punc; - preg_match_all("{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp); + preg_match_all( "{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp ); - debug_fwrite($log, 'Post contents:'); - debug_fwrite($log, $content."\n"); + 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', $mid ); + } + } - foreach($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']) ) + 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[] = $link_test; - elseif (($test['path'] != '/') && ($test['path'] != '')) + elseif ( isset($test['path']) && ( $test['path'] != '/' ) && ($test['path'] != '' ) ) $post_links[] = $link_test; - endif; - endforeach; + } + } + + 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( $url ) . '%' ) ) ) { - foreach ($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'] ); + $len = isset( $headers['content-length'] ) ? (int) $headers['content-length'] : 0; + $type = isset( $headers['content-type'] ) ? $headers['content-type'] : ''; $allowed_types = array( 'video', 'audio' ); + + // 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 ( get_allowed_mime_types( ) as $exts => $mime ) { + if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) { + $type = $mime; + break; + } + } + } + } + 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')" ); + add_post_meta( $post_ID, 'enclosure', "$url\n$len\n$mime\n" ); } } } - endforeach; + } } -function wp_get_http_headers( $url, $red = 1 ) { - global $wp_version; +/** + * 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 ); if ( $red > 5 ) - return false; + return false; + + $options = array(); + $options['redirection'] = 5; - $parts = parse_url( $url ); - $file = $parts['path'] . ($parts['query'] ? '?'.$parts['query'] : ''); - $host = $parts['host']; - if ( !isset( $parts['port'] ) ) - $parts['port'] = 80; + if ( false == $file_path ) + $options['method'] = 'HEAD'; + else + $options['method'] = 'GET'; - $head = "HEAD $file HTTP/1.1\r\nHOST: $host\r\nUser-Agent: WordPress/" . $wp_version . "\r\n\r\n"; + $response = wp_remote_request($url, $options); - $fp = @fsockopen($host, $parts['port'], $err_num, $err_msg, 3); - if ( !$fp ) + if ( is_wp_error( $response ) ) return false; - $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]; + $headers = wp_remote_retrieve_headers( $response ); + $headers['response'] = wp_remote_retrieve_response_code( $response ); + + // 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 ); } - preg_match('/.*([0-9]{3}).*/', $response, $return); - $headers['response'] = $return[1]; // HTTP response code eg 204, 200, 404 + if ( false == $file_path ) + return $headers; + + // GET request - write it to the supplied filename + $out_fp = fopen($file_path, 'w'); + if ( !$out_fp ) + return $headers; - $code = $headers['response']; - if ( ('302' == $code || '301' == $code) && isset($headers['location']) ) - return wp_get_http_headers( $headers['location'], ++$red ); + fwrite( $out_fp, wp_remote_retrieve_body( $response ) ); + fclose($out_fp); + clearstatcache(); return $headers; } -function is_new_day() { - global $day, $previousday; - if ( $day != $previousday ) { - return(1); - } else { - return(0); - } -} +/** + * 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( $deprecated ) ) + _deprecated_argument( __FUNCTION__, '2.7' ); -function build_query($data) { - return _http_build_query($data, NULL, '&', '', false); -} + $response = wp_remote_head( $url ); + + if ( is_wp_error( $response ) ) + 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. + return wp_remote_retrieve_headers( $response ); +} -Parameters: -add_query_arg(newkey, newvalue, oldquery_or_uri) or -add_query_arg(associative_array, oldquery_or_uri) -*/ +/** + * 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; +} + +/** + * 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 ) + $v = '0'; + + if ( is_array($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 = ''; - if ( is_array(func_get_arg(0)) ) { - if ( @func_num_args() < 2 || false === @func_get_arg(1) ) + if ( is_array( func_get_arg(0) ) ) { + if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) ) $uri = $_SERVER['REQUEST_URI']; else - $uri = @func_get_arg(1); + $uri = @func_get_arg( 1 ); } else { - if ( @func_num_args() < 3 || false === @func_get_arg(2) ) + if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) ) $uri = $_SERVER['REQUEST_URI']; else - $uri = @func_get_arg(2); + $uri = @func_get_arg( 2 ); } - if ( $frag = strstr($uri, '#') ) - $uri = substr($uri, 0, -strlen($frag)); + if ( $frag = strstr( $uri, '#' ) ) + $uri = substr( $uri, 0, -strlen( $frag ) ); else $frag = ''; - if ( preg_match('|^https?://|i', $uri, $matches) ) { + if ( preg_match( '|^https?://|i', $uri, $matches ) ) { $protocol = $matches[0]; - $uri = substr($uri, strlen($protocol)); + $uri = substr( $uri, strlen( $protocol ) ); } else { $protocol = ''; } - if (strpos($uri, '?') !== false) { - $parts = explode('?', $uri, 2); - if ( 1 == count($parts) ) { + if ( strpos( $uri, '?' ) !== false ) { + $parts = explode( '?', $uri, 2 ); + if ( 1 == count( $parts ) ) { $base = '?'; $query = $parts[0]; } else { $base = $parts[0] . '?'; $query = $parts[1]; } - } elseif (!empty($protocol) || strpos($uri, '=') === false ) { + } elseif ( !empty( $protocol ) || strpos( $uri, '=' ) === false ) { $base = $uri . '?'; $query = ''; } else { @@ -636,113 +678,124 @@ function add_query_arg() { $query = $uri; } - wp_parse_str($query, $qs); - $qs = urlencode_deep($qs); // this re-URL-encodes things that were already in the query string - if ( is_array(func_get_arg(0)) ) { - $kayvees = func_get_arg(0); - $qs = array_merge($qs, $kayvees); + wp_parse_str( $query, $qs ); + $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string + 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); + $qs[func_get_arg( 0 )] = func_get_arg( 1 ); } - foreach ( $qs as $k => $v ) { + foreach ( (array) $qs as $k => $v ) { if ( $v === false ) - unset($qs[$k]); + unset( $qs[$k] ); } - $ret = build_query($qs); - $ret = trim($ret, '?'); - $ret = preg_replace('#=(&|$)#', '$1', $ret); + $ret = build_query( $qs ); + $ret = trim( $ret, '?' ); + $ret = preg_replace( '#=(&|$)#', '$1', $ret ); $ret = $protocol . $base . $ret . $frag; - $ret = rtrim($ret, '?'); + $ret = rtrim( $ret, '?' ); return $ret; } -/* -remove_query_arg: Returns a modified querystring by removing -a single key or an array of keys. -Omitting oldquery_or_uri uses the $_SERVER value. - -Parameters: -remove_query_arg(removekey, [oldquery_or_uri]) or -remove_query_arg(removekeyarray, [oldquery_or_uri]) -*/ - -function remove_query_arg($key, $query=FALSE) { - if ( is_array($key) ) { // removing multiple keys - foreach ( (array) $key as $k ) - $query = add_query_arg($k, FALSE, $query); +/** + * 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, $query); -} - -function add_magic_quotes($array) { - global $wpdb; - - foreach ($array as $k => $v) { - if ( is_array($v) ) { - $array[$k] = add_magic_quotes($v); + return add_query_arg( $key, false, $query ); +} + +/** + * Walks the array while sanitizing the contents. + * + * @since 0.71 + * + * @param array $array Array to used 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] = $wpdb->escape($v); + $array[$k] = addslashes( $v ); } } return $array; } +/** + * 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 ) { - $timeout = 10; - $parsed_url = @parse_url($uri); + $parsed_url = @parse_url( $uri ); - if ( !$parsed_url || !is_array($parsed_url) ) + if ( !$parsed_url || !is_array( $parsed_url ) ) return false; - if ( !isset($parsed_url['scheme']) || !in_array($parsed_url['scheme'], array('http','https')) ) - $uri = 'http://' . $uri; + $options = array(); + $options['timeout'] = 10; - if ( ini_get('allow_url_fopen') ) { - $fp = @fopen( $uri, 'r' ); - if ( !$fp ) - return false; + $response = wp_remote_get( $uri, $options ); - //stream_set_timeout($fp, $timeout); // Requires php 4.3 - $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 ($handle, CURLOPT_RETURNTRANSFER, 1); - curl_setopt ($handle, CURLOPT_TIMEOUT, $timeout); - $buffer = curl_exec($handle); - curl_close($handle); - return $buffer; - } else { + if ( is_wp_error( $response ) ) return false; - } + + return wp_remote_retrieve_body( $response ); } -function wp($query_vars = '') { +/** + * 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 ); - $wp->main($query_vars); - - if( !isset($wp_the_query) ) + if ( !isset($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 = (int) $code; + $code = absint( $code ); - if ( !isset($wp_header_to_desc) ) { + if ( !isset( $wp_header_to_desc ) ) { $wp_header_to_desc = array( 100 => 'Continue', 101 => 'Switching Protocols', + 102 => 'Processing', 200 => 'OK', 201 => 'Created', @@ -751,6 +804,8 @@ function get_status_header_desc( $code ) { 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content', + 207 => 'Multi-Status', + 226 => 'IM Used', 300 => 'Multiple Choices', 301 => 'Moved Permanently', @@ -758,10 +813,12 @@ function get_status_header_desc( $code ) { 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', @@ -777,23 +834,40 @@ function get_status_header_desc( $code ) { 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' + 505 => 'HTTP Version Not Supported', + 506 => 'Variant Also Negotiates', + 507 => 'Insufficient Storage', + 510 => 'Not Extended' ); } - if ( isset( $wp_header_to_desc[$code] ) ) { + if ( isset( $wp_header_to_desc[$code] ) ) return $wp_header_to_desc[$code]; - } else { + 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 ); @@ -801,261 +875,896 @@ function status_header( $header ) { return false; $protocol = $_SERVER["SERVER_PROTOCOL"]; - if ( ('HTTP/1.1' != $protocol) && ('HTTP/1.0' != $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); + 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', + 'Last-Modified' => gmdate( 'D, d M Y H:i:s' ) . ' GMT', + 'Cache-Control' => 'no-cache, must-revalidate, max-age=0', + 'Pragma' => 'no-cache', + ); - if ( version_compare( phpversion(), '4.3.0', '>=' ) ) { - return @header( $status_header, true, $header ); - } else { - return @header( $status_header ); + if ( function_exists('apply_filters') ) { + $headers = (array) apply_filters('nocache_headers', $headers); } + return $headers; } +/** + * 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() { - @ 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'); + $headers = wp_get_nocache_headers(); + foreach( $headers as $name => $field_value ) + @header("{$name}: {$field_value}"); } +/** + * Set the headers for caching for 10 days with JavaScript content type. + * + * @since 2.1.0 + */ function cache_javascript_headers() { $expiresOffset = 864000; // 10 days - 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"); -} - + 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" ); +} + +/** + * 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; return $wpdb->num_queries; } +/** + * 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; - $feed = get_query_var('feed'); + $feed = get_query_var( 'feed' ); // Remove the pad, if present. - $feed = preg_replace('/^_+/', '', $feed); + $feed = preg_replace( '/^_+/', '', $feed ); if ( $feed == '' || $feed == 'feed' ) - $feed = 'rss2'; + $feed = get_default_feed(); $hook = 'do_feed_' . $feed; - do_action($hook, $wp_query->is_comment_feed); + if ( !has_action($hook) ) { + $message = sprintf( __( 'ERROR: %s is not a valid feed template.' ), esc_html($feed)); + wp_die( $message, '', array( 'response' => 404 ) ); + } + + do_action( $hook, $wp_query->is_comment_feed ); } +/** + * Load the RDF RSS 0.91 Feed template. + * + * @since 2.1.0 + */ function do_feed_rdf() { - load_template(ABSPATH . WPINC . '/feed-rdf.php'); + load_template( ABSPATH . WPINC . '/feed-rdf.php' ); } +/** + * Load the RSS 1.0 Feed Template. + * + * @since 2.1.0 + */ function do_feed_rss() { - load_template(ABSPATH . WPINC . '/feed-rss.php'); -} + load_template( ABSPATH . WPINC . '/feed-rss.php' ); +} + +/** + * 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' ); -function do_feed_rss2($for_comments) { - if ( $for_comments ) { - load_template(ABSPATH . WPINC . '/feed-rss2-comments.php'); - } else { - load_template(ABSPATH . WPINC . '/feed-rss2.php'); - } -} + do_action( 'do_robotstxt' ); -function do_feed_atom($for_comments) { - if ($for_comments) { - load_template(ABSPATH . WPINC . '/feed-atom-comments.php'); + $output = "User-agent: *\n"; + $public = get_option( 'blog_public' ); + if ( '0' == $public ) { + $output .= "Disallow: /\n"; } else { - load_template(ABSPATH . WPINC . '/feed-atom.php'); + $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; + + // Check cache first. If options table goes away and we have true cached, oh well. + if ( wp_cache_get( 'is_blog_installed' ) ) + return true; + + $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 ); -function do_robots() { - header('Content-Type: text/plain; charset=utf-8'); + $installed = !empty( $installed ); + wp_cache_set( 'is_blog_installed', $installed ); - do_action('do_robotstxt'); + if ( $installed ) + return true; - if ( '0' == get_option('blog_public') ) { - echo "User-agent: *\n"; - echo "Disallow: /\n"; - } else { - echo "User-agent: *\n"; - echo "Disallow:\n"; - } -} + // If visiting repair.php, return true and let it take over. + if ( defined( 'WP_REPAIRING' ) ) + return true; -function is_blog_installed() { - global $wpdb; - $show = $wpdb->hide_errors(); - $installed = $wpdb->get_var("SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'"); - $wpdb->show_errors($show); + $suppress = $wpdb->suppress_errors(); - $install_status = !empty( $installed ) ? TRUE : FALSE; - return $install_status; -} + // 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 == $table ) + continue; -function wp_nonce_url($actionurl, $action = -1) { - $actionurl = str_replace('&', '&', $actionurl); - return wp_specialchars(add_query_arg('_wpnonce', wp_create_nonce($action), $actionurl)); -} + if ( ! $wpdb->get_results( "DESCRIBE $table;" ) ) + continue; -function wp_nonce_field($action = -1, $name = "_wpnonce", $referer = true) { - $name = attribute_escape($name); - echo '<input type="hidden" name="' . $name . '" value="' . wp_create_nonce($action) . '" />'; - if ( $referer ) - wp_referer_field(); -} + // One or more tables exist. We are insane. + + wp_load_translations_early(); -function wp_referer_field() { - $ref = attribute_escape($_SERVER['REQUEST_URI']); - echo '<input type="hidden" name="_wp_http_referer" value="'. $ref . '" />'; - if ( wp_get_original_referer() ) { - $original_ref = attribute_escape(stripslashes(wp_get_original_referer())); - echo '<input type="hidden" name="_wp_original_http_referer" value="'. $original_ref . '" />'; + // Die with a DB error. + $wpdb->error = sprintf( __( 'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.' ), 'maint/repair.php?referrer=is_blog_installed' ); + dead_db(); } -} -function wp_original_referer_field() { - echo '<input type="hidden" name="_wp_original_http_referer" value="' . attribute_escape(stripslashes($_SERVER['REQUEST_URI'])) . '" />'; + $wpdb->suppress_errors( $suppress ); + + wp_cache_set( 'is_blog_installed', false ); + + return false; } +/** + * 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 + * @return string URL with nonce action added. + */ +function wp_nonce_url( $actionurl, $action = -1 ) { + $actionurl = str_replace( '&', '&', $actionurl ); + return esc_html( add_query_arg( '_wpnonce', 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 ) { + $ref = esc_attr( $_SERVER['REQUEST_URI'] ); + $referer_field = '<input type="hidden" name="_wp_http_referer" value="'. $ref . '" />'; + + 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' ) { + $jump_back_to = ( 'previous' == $jump_back_to ) ? wp_get_referer() : $_SERVER['REQUEST_URI']; + $ref = ( wp_get_original_referer() ) ? wp_get_original_referer() : $jump_back_to; + $orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( stripslashes( $ref ) ) . '" />'; + if ( $echo ) + echo $orig_referer_field; + return $orig_referer_field; +} + +/** + * Retrieve referer from '_wp_http_referer' or HTTP referer. If it's the same + * as the current request URL, will return false. + * + * @package WordPress + * @subpackage Security + * @since 2.0.4 + * + * @return string|bool False on failure. Referer URL on success. + */ function wp_get_referer() { - foreach ( array($_REQUEST['_wp_http_referer'], $_SERVER['HTTP_REFERER']) as $ref ) - if ( !empty($ref) ) - return $ref; + $ref = false; + if ( ! empty( $_REQUEST['_wp_http_referer'] ) ) + $ref = $_REQUEST['_wp_http_referer']; + else if ( ! empty( $_SERVER['HTTP_REFERER'] ) ) + $ref = $_SERVER['HTTP_REFERER']; + + if ( $ref && $ref !== $_SERVER['REQUEST_URI'] ) + return $ref; return false; } +/** + * Retrieve original referer that was posted, if it exists. + * + * @package WordPress + * @subpackage Security + * @since 2.0.4 + * + * @return string|bool False if no original referer or original referer if set. + */ function wp_get_original_referer() { - if ( !empty($_REQUEST['_wp_original_http_referer']) ) + if ( !empty( $_REQUEST['_wp_original_http_referer'] ) ) return $_REQUEST['_wp_original_http_referer']; return false; } -function wp_mkdir_p($target) { +/** + * 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( $target ) { // from php.net/mkdir user contributed notes - if (file_exists($target)) { - if (! @ is_dir($target)) - return false; - else - return true; - } + $target = str_replace( '//', '/', $target ); + + // 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 ( file_exists( $target ) ) + return @is_dir( $target ); // Attempting to create the directory may clutter up our display. - if (@ mkdir($target)) { - $stat = @ stat(dirname($target)); + if ( @mkdir( $target ) ) { + $stat = @stat( dirname( $target ) ); $dir_perms = $stat['mode'] & 0007777; // Get the permission bits. - @ chmod($target, $dir_perms); + @chmod( $target, $dir_perms ); return true; - } else { - if ( is_dir(dirname($target)) ) + } elseif ( is_dir( dirname( $target ) ) ) { return false; } // If the above failed, attempt to create the parent node, then try again. - if (wp_mkdir_p(dirname($target))) - return wp_mkdir_p($target); + if ( ( $target != '/' ) && ( wp_mkdir_p( dirname( $target ) ) ) ) + return wp_mkdir_p( $target ); return false; } -// Returns an array containing the current upload directory's path and url, or an error message. -function wp_upload_dir() { - $siteurl = get_option('siteurl'); - //prepend ABSPATH to $dir and $siteurl to $url if they're not already there - $path = str_replace(ABSPATH, '', trim(get_option('upload_path'))); - $dir = ABSPATH . $path; - $url = trailingslashit($siteurl) . $path; +/** + * 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) == $path ) + return true; + + if ( strlen($path) == 0 || $path[0] == '.' ) + return false; + + // 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 to WP_CONTENT_DIR followed by the return value of <code>sys_get_temp_dir()</code>, 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 ( $temp ) + return trailingslashit($temp); + + $temp = WP_CONTENT_DIR . '/'; + if ( is_dir($temp) && @is_writable($temp) ) + return $temp; + + if ( function_exists('sys_get_temp_dir') ) { + $temp = sys_get_temp_dir(); + if ( @is_writable($temp) ) + return trailingslashit($temp); + } + + $temp = ini_get('upload_tmp_dir'); + if ( is_dir($temp) && @is_writable($temp) ) + return trailingslashit($temp); + + $temp = '/tmp/'; + return $temp; +} + +/** + * 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 ) { + global $switched; + $siteurl = get_option( 'siteurl' ); + $upload_path = get_option( 'upload_path' ); + $upload_path = trim($upload_path); + $main_override = is_multisite() && defined( 'MULTISITE' ) && is_main_site(); + if ( empty($upload_path) ) { + $dir = WP_CONTENT_DIR . '/uploads'; + } else { + $dir = $upload_path; + if ( 'wp-content/uploads' == $upload_path ) { + $dir = WP_CONTENT_DIR . '/uploads'; + } elseif ( 0 !== strpos($dir, ABSPATH) ) { + // $dir is absolute, $upload_path is (maybe) relative to ABSPATH + $dir = path_join( ABSPATH, $dir ); + } + } - if ( $dir == ABSPATH ) { //the option was empty - $dir = ABSPATH . 'wp-content/uploads'; + if ( !$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 ) . $upload_path; } - if ( defined('UPLOADS') ) { + if ( defined('UPLOADS') && !$main_override && ( !isset( $switched ) || $switched === false ) ) { $dir = ABSPATH . UPLOADS; - $url = trailingslashit($siteurl) . UPLOADS; + $url = trailingslashit( $siteurl ) . UPLOADS; + } + + if ( is_multisite() && !$main_override && ( !isset( $switched ) || $switched === false ) ) { + if ( defined( 'BLOGUPLOADDIR' ) ) + $dir = untrailingslashit(BLOGUPLOADDIR); + $url = str_replace( UPLOADS, 'files', $url ); } - if ( get_option('uploads_use_yearmonth_folders')) { + $bdir = $dir; + $burl = $url; + + $subdir = ''; + if ( get_option( 'uploads_use_yearmonth_folders' ) ) { // Generate the yearly and monthly dirs - $time = current_time( 'mysql' ); + if ( !$time ) + $time = current_time( 'mysql' ); $y = substr( $time, 0, 4 ); $m = substr( $time, 5, 2 ); - $dir = $dir . "/$y/$m"; - $url = $url . "/$y/$m"; + $subdir = "/$y/$m"; } - // Make sure we have an uploads dir - if ( ! wp_mkdir_p( $dir ) ) { - $message = sprintf(__('Unable to create directory %s. Is its parent directory writable by the server?'), $dir); - return array('error' => $message); - } + $dir .= $subdir; + $url .= $subdir; - $uploads = array('path' => $dir, 'url' => $url, 'error' => false); - return apply_filters('upload_dir', $uploads); -} + $uploads = apply_filters( 'upload_dir', array( 'path' => $dir, 'url' => $url, 'subdir' => $subdir, 'basedir' => $bdir, 'baseurl' => $burl, 'error' => false ) ); + + // Make sure we have an uploads dir + if ( ! wp_mkdir_p( $uploads['path'] ) ) { + $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $uploads['path'] ); + return array( '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 { + $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 $filename2; + } -function wp_upload_bits($name, $type, $bits) { - if ( empty($name) ) - return array('error' => __("Empty filename")); + while ( file_exists( $dir . "/$filename" ) ) { + if ( '' == "$number$ext" ) + $filename = $filename . ++$number . $ext; + else + $filename = str_replace( "$number$ext", ++$number . $ext, $filename ); + } + } - $wp_filetype = wp_check_filetype($name); + 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'] ) - return array('error' => __("Invalid file type")); + return array( 'error' => __( 'Invalid file type' ) ); - $upload = wp_upload_dir(); + $upload = wp_upload_dir( $time ); if ( $upload['error'] !== false ) return $upload; - $number = ''; - $filename = $name; - $path_parts = pathinfo($filename); - $ext = $path_parts['extension']; - if ( empty($ext) ) - $ext = ''; - else - $ext = ".$ext"; - while ( file_exists($upload['path'] . "/$filename") ) { - if ( '' == "$number$ext" ) - $filename = $filename . ++$number . $ext; - else - $filename = str_replace("$number$ext", ++$number . $ext, $filename); + $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) ) ) { - $message = sprintf(__('Unable to create directory %s. Is its parent directory writable by the server?'), dirname($new_file)); - return array('error' => $message); + if ( ! wp_mkdir_p( dirname( $new_file ) ) ) { + $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), dirname( $new_file ) ); + return array( 'error' => $message ); } - $ifp = @ fopen($new_file, 'wb'); + $ifp = @ fopen( $new_file, 'wb' ); if ( ! $ifp ) - return array('error' => sprintf(__('Could not write file %s'), $new_file)); + return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) ); + + @fwrite( $ifp, $bits ); + fclose( $ifp ); + clearstatcache(); - $success = @ fwrite($ifp, $bits); - fclose($ifp); // Set correct file permissions - $stat = @ stat(dirname($new_file)); + $stat = @ stat( dirname( $new_file ) ); $perms = $stat['mode'] & 0007777; $perms = $perms & 0000666; - @ chmod($new_file, $perms); + @ chmod( $new_file, $perms ); + clearstatcache(); // Compute the URL $url = $upload['url'] . "/$filename"; - return array('file' => $new_file, 'url' => $url, 'error' => false); + 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', 'xlsb', 'xlsm' ), + 'interactive' => array( 'key', 'ppt', 'pptx', 'pptm', 'odp', 'swf' ), + '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; + } + } + + 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 ); + } + } + } + + // 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, $mimes ); } -function wp_check_filetype($filename, $mimes = null) { - // Accepted MIME types are set here as PCRE unless provided. - $mimes = is_array($mimes) ? $mimes : apply_filters('upload_mimes', array ( +/** + * Retrieve list of allowed mime types and file extensions. + * + * @since 2.8.6 + * + * @return array Array of mime types keyed by the file extension regex corresponding to those types. + */ +function get_allowed_mime_types() { + static $mimes = false; + + if ( !$mimes ) { + // Accepted MIME types are set here as PCRE unless provided. + $mimes = apply_filters( 'upload_mimes', array( 'jpg|jpeg|jpe' => 'image/jpeg', 'gif' => 'image/gif', 'png' => 'image/png', @@ -1064,32 +1773,48 @@ function wp_check_filetype($filename, $mimes = null) { 'ico' => 'image/x-icon', 'asf|asx|wax|wmv|wmx' => 'video/asf', 'avi' => 'video/avi', + 'divx' => 'video/divx', + 'flv' => 'video/x-flv', 'mov|qt' => 'video/quicktime', 'mpeg|mpg|mpe' => 'video/mpeg', - 'txt|c|cc|h' => 'text/plain', + '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', - 'mp3|mp4' => 'audio/mpeg', + 'mp3|m4a|m4b' => 'audio/mpeg', + 'mp4|m4v' => 'video/mp4', 'ra|ram' => 'audio/x-realaudio', 'wav' => 'audio/wav', - 'ogg' => 'audio/ogg', + 'ogg|oga' => 'audio/ogg', + 'ogv' => 'video/ogg', 'mid|midi' => 'audio/midi', 'wma' => 'audio/wma', + 'mka' => 'audio/x-matroska', + 'mkv' => 'video/x-matroska', 'rtf' => 'application/rtf', 'js' => 'application/javascript', 'pdf' => 'application/pdf', - 'doc' => 'application/msword', - 'pot|pps|ppt' => 'application/vnd.ms-powerpoint', + 'doc|docx' => 'application/msword', + 'pot|pps|ppt|pptx|ppam|pptm|sldm|ppsm|potm' => 'application/vnd.ms-powerpoint', 'wri' => 'application/vnd.ms-write', - 'xla|xls|xlt|xlw' => 'application/vnd.ms-excel', + 'xla|xls|xlsx|xlt|xlw|xlam|xlsb|xlsm|xltm' => 'application/vnd.ms-excel', 'mdb' => 'application/vnd.ms-access', 'mpp' => 'application/vnd.ms-project', + 'docm|dotm' => 'application/vnd.ms-word', + 'pptx|sldx|ppsx|potx' => 'application/vnd.openxmlformats-officedocument.presentationml', + 'xlsx|xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml', + 'docx|dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml', + 'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote', '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', // openoffice formats 'odt' => 'application/vnd.oasis.opendocument.text', @@ -1099,127 +1824,190 @@ function wp_check_filetype($filename, $mimes = null) { 'odc' => 'application/vnd.oasis.opendocument.chart', 'odb' => 'application/vnd.oasis.opendocument.database', 'odf' => 'application/vnd.oasis.opendocument.formula', - - )); - - $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 = $ext_matches[1]; - break; - } - } - - return compact('ext', 'type'); -} - -function wp_explain_nonce($action) { - if ( $action !== -1 && preg_match('/([a-z]+)-([a-z]+)(_(.+))?/', $action, $matches) ) { + // wordperfect formats + 'wp|wpd' => 'application/wordperfect', + ) ); + } + + return $mimes; +} + +/** + * Retrieve nonce action "Are you sure" message. + * + * The action is split by verb and noun. The action format is as follows: + * verb-action_extra. The verb is before the first dash and has the format of + * letters and no spaces and numbers. The noun is after the dash and before the + * underscore, if an underscore exists. The noun is also only letters. + * + * The filter will be called for any action, which is not defined by WordPress. + * You may use the filter for your plugin to explain nonce actions to the user, + * when they get the "Are you sure?" message. The filter is in the format of + * 'explain_nonce_$verb-$noun' with the $verb replaced by the found verb and the + * $noun replaced by the found noun. The two parameters that are given to the + * hook are the localized "Are you sure you want to do this?" message with the + * extra text (the text after the underscore). + * + * @package WordPress + * @subpackage Security + * @since 2.0.4 + * + * @param string $action Nonce action. + * @return string Are you sure message. + */ +function wp_explain_nonce( $action ) { + if ( $action !== -1 && preg_match( '/([a-z]+)-([a-z]+)(_(.+))?/', $action, $matches ) ) { $verb = $matches[1]; $noun = $matches[2]; $trans = array(); - $trans['update']['attachment'] = array(__('Are you sure you want to edit this attachment: "%s"?'), 'get_the_title'); - - $trans['add']['category'] = array(__('Are you sure you want to add this category?'), false); - $trans['delete']['category'] = array(__('Are you sure you want to delete this category: "%s"?'), 'get_catname'); - $trans['update']['category'] = array(__('Are you sure you want to edit this category: "%s"?'), 'get_catname'); - - $trans['delete']['comment'] = array(__('Are you sure you want to delete this comment: "%s"?'), 'use_id'); - $trans['unapprove']['comment'] = array(__('Are you sure you want to unapprove this comment: "%s"?'), 'use_id'); - $trans['approve']['comment'] = array(__('Are you sure you want to approve this comment: "%s"?'), 'use_id'); - $trans['update']['comment'] = array(__('Are you sure you want to edit this comment: "%s"?'), 'use_id'); - $trans['bulk']['comments'] = array(__('Are you sure you want to bulk modify comments?'), false); - $trans['moderate']['comments'] = array(__('Are you sure you want to moderate comments?'), false); - - $trans['add']['bookmark'] = array(__('Are you sure you want to add this link?'), false); - $trans['delete']['bookmark'] = array(__('Are you sure you want to delete this link: "%s"?'), 'use_id'); - $trans['update']['bookmark'] = array(__('Are you sure you want to edit this link: "%s"?'), 'use_id'); - $trans['bulk']['bookmarks'] = array(__('Are you sure you want to bulk modify links?'), false); - - $trans['add']['page'] = array(__('Are you sure you want to add this page?'), false); - $trans['delete']['page'] = array(__('Are you sure you want to delete this page: "%s"?'), 'get_the_title'); - $trans['update']['page'] = array(__('Are you sure you want to edit this page: "%s"?'), 'get_the_title'); - - $trans['edit']['plugin'] = array(__('Are you sure you want to edit this plugin file: "%s"?'), 'use_id'); - $trans['activate']['plugin'] = array(__('Are you sure you want to activate this plugin: "%s"?'), 'use_id'); - $trans['deactivate']['plugin'] = array(__('Are you sure you want to deactivate this plugin: "%s"?'), 'use_id'); - - $trans['add']['post'] = array(__('Are you sure you want to add this post?'), false); - $trans['delete']['post'] = array(__('Are you sure you want to delete this post: "%s"?'), 'get_the_title'); - $trans['update']['post'] = array(__('Are you sure you want to edit this post: "%s"?'), 'get_the_title'); - - $trans['add']['user'] = array(__('Are you sure you want to add this user?'), false); - $trans['delete']['users'] = array(__('Are you sure you want to delete users?'), false); - $trans['bulk']['users'] = array(__('Are you sure you want to bulk modify users?'), false); - $trans['update']['user'] = array(__('Are you sure you want to edit this user: "%s"?'), 'get_author_name'); - $trans['update']['profile'] = array(__('Are you sure you want to modify the profile for: "%s"?'), 'get_author_name'); - - $trans['update']['options'] = array(__('Are you sure you want to edit your settings?'), false); - $trans['update']['permalink'] = array(__('Are you sure you want to change your permalink structure to: %s?'), 'use_id'); - $trans['edit']['file'] = array(__('Are you sure you want to edit this file: "%s"?'), 'use_id'); - $trans['edit']['theme'] = array(__('Are you sure you want to edit this theme file: "%s"?'), 'use_id'); - $trans['switch']['theme'] = array(__('Are you sure you want to switch to this theme: "%s"?'), 'use_id'); - - if ( isset($trans[$verb][$noun]) ) { - if ( !empty($trans[$verb][$noun][1]) ) { + $trans['update']['attachment'] = array( __( 'Your attempt to edit this attachment: “%s” has failed.' ), 'get_the_title' ); + + $trans['add']['category'] = array( __( 'Your attempt to add this category has failed.' ), false ); + $trans['delete']['category'] = array( __( 'Your attempt to delete this category: “%s” has failed.' ), 'get_cat_name' ); + $trans['update']['category'] = array( __( 'Your attempt to edit this category: “%s” has failed.' ), 'get_cat_name' ); + + $trans['delete']['comment'] = array( __( 'Your attempt to delete this comment: “%s” has failed.' ), 'use_id' ); + $trans['unapprove']['comment'] = array( __( 'Your attempt to unapprove this comment: “%s” has failed.' ), 'use_id' ); + $trans['approve']['comment'] = array( __( 'Your attempt to approve this comment: “%s” has failed.' ), 'use_id' ); + $trans['update']['comment'] = array( __( 'Your attempt to edit this comment: “%s” has failed.' ), 'use_id' ); + $trans['bulk']['comments'] = array( __( 'Your attempt to bulk modify comments has failed.' ), false ); + $trans['moderate']['comments'] = array( __( 'Your attempt to moderate comments has failed.' ), false ); + + $trans['add']['bookmark'] = array( __( 'Your attempt to add this link has failed.' ), false ); + $trans['delete']['bookmark'] = array( __( 'Your attempt to delete this link: “%s” has failed.' ), 'use_id' ); + $trans['update']['bookmark'] = array( __( 'Your attempt to edit this link: “%s” has failed.' ), 'use_id' ); + $trans['bulk']['bookmarks'] = array( __( 'Your attempt to bulk modify links has failed.' ), false ); + + $trans['add']['page'] = array( __( 'Your attempt to add this page has failed.' ), false ); + $trans['delete']['page'] = array( __( 'Your attempt to delete this page: “%s” has failed.' ), 'get_the_title' ); + $trans['update']['page'] = array( __( 'Your attempt to edit this page: “%s” has failed.' ), 'get_the_title' ); + + $trans['edit']['plugin'] = array( __( 'Your attempt to edit this plugin file: “%s” has failed.' ), 'use_id' ); + $trans['activate']['plugin'] = array( __( 'Your attempt to activate this plugin: “%s” has failed.' ), 'use_id' ); + $trans['deactivate']['plugin'] = array( __( 'Your attempt to deactivate this plugin: “%s” has failed.' ), 'use_id' ); + $trans['upgrade']['plugin'] = array( __( 'Your attempt to update this plugin: “%s” has failed.' ), 'use_id' ); + + $trans['add']['post'] = array( __( 'Your attempt to add this post has failed.' ), false ); + $trans['delete']['post'] = array( __( 'Your attempt to delete this post: “%s” has failed.' ), 'get_the_title' ); + $trans['update']['post'] = array( __( 'Your attempt to edit this post: “%s” has failed.' ), 'get_the_title' ); + + $trans['add']['user'] = array( __( 'Your attempt to add this user has failed.' ), false ); + $trans['delete']['users'] = array( __( 'Your attempt to delete users has failed.' ), false ); + $trans['bulk']['users'] = array( __( 'Your attempt to bulk modify users has failed.' ), false ); + $trans['update']['user'] = array( __( 'Your attempt to edit this user: “%s” has failed.' ), 'get_the_author_meta', 'display_name' ); + $trans['update']['profile'] = array( __( 'Your attempt to modify the profile for: “%s” has failed.' ), 'get_the_author_meta', 'display_name' ); + + $trans['update']['options'] = array( __( 'Your attempt to edit your settings has failed.' ), false ); + $trans['update']['permalink'] = array( __( 'Your attempt to change your permalink structure to: %s has failed.' ), 'use_id' ); + $trans['edit']['file'] = array( __( 'Your attempt to edit this file: “%s” has failed.' ), 'use_id' ); + $trans['edit']['theme'] = array( __( 'Your attempt to edit this theme file: “%s” has failed.' ), 'use_id' ); + $trans['switch']['theme'] = array( __( 'Your attempt to switch to this theme: “%s” has failed.' ), 'use_id' ); + + $trans['log']['out'] = array( sprintf( __( 'You are attempting to log out of %s' ), get_bloginfo( 'sitename' ) ), false ); + + if ( isset( $trans[$verb][$noun] ) ) { + if ( !empty( $trans[$verb][$noun][1] ) ) { $lookup = $trans[$verb][$noun][1]; + if ( isset($trans[$verb][$noun][2]) ) + $lookup_value = $trans[$verb][$noun][2]; $object = $matches[4]; - if ( 'use_id' != $lookup ) - $object = call_user_func($lookup, $object); - return sprintf($trans[$verb][$noun][0], $object); + if ( 'use_id' != $lookup ) { + if ( isset( $lookup_value ) ) + $object = call_user_func( $lookup, $lookup_value, $object ); + else + $object = call_user_func( $lookup, $object ); + } + return sprintf( $trans[$verb][$noun][0], esc_html($object) ); } else { return $trans[$verb][$noun][0]; } } - } - - return apply_filters( 'explain_nonce_' . $verb . '-' . $noun, __('Are you sure you want to do this?'), $matches[4] ); -} - -function wp_nonce_ays($action) { - global $pagenow, $menu, $submenu, $parent_file, $submenu_file; - $adminurl = get_option('siteurl') . '/wp-admin'; - if ( wp_get_referer() ) - $adminurl = clean_url(wp_get_referer()); - - $title = __('WordPress Confirmation'); - // Remove extra layer of slashes. - $_POST = stripslashes_deep($_POST ); - if ( $_POST ) { - $q = http_build_query($_POST); - $q = explode( ini_get('arg_separator.output'), $q); - $html .= "\t<form method='post' action='" . attribute_escape($pagenow) . "'>\n"; - foreach ( (array) $q as $a ) { - $v = substr(strstr($a, '='), 1); - $k = substr($a, 0, -(strlen($v)+1)); - $html .= "\t\t<input type='hidden' name='" . attribute_escape(urldecode($k)) . "' value='" . attribute_escape(urldecode($v)) . "' />\n"; - } - $html .= "\t\t<input type='hidden' name='_wpnonce' value='" . wp_create_nonce($action) . "' />\n"; - $html .= "\t\t<div id='message' class='confirm fade'>\n\t\t<p>" . wp_specialchars(wp_explain_nonce($action)) . "</p>\n\t\t<p><a href='$adminurl'>" . __('No') . "</a> <input type='submit' value='" . __('Yes') . "' /></p>\n\t\t</div>\n\t</form>\n"; + return apply_filters( 'explain_nonce_' . $verb . '-' . $noun, __( 'Are you sure you want to do this?' ), isset($matches[4]) ? $matches[4] : '' ); } else { - $html .= "\t<div id='message' class='confirm fade'>\n\t<p>" . wp_specialchars(wp_explain_nonce($action)) . "</p>\n\t<p><a href='$adminurl'>" . __('No') . "</a> <a href='" . clean_url(add_query_arg( '_wpnonce', wp_create_nonce($action), $_SERVER['REQUEST_URI'] )) . "'>" . __('Yes') . "</a></p>\n\t</div>\n"; - } - $html .= "</body>\n</html>"; - wp_die($html, $title); -} - -function wp_die( $message, $title = '' ) { - global $wp_locale; + return apply_filters( 'explain_nonce_' . $action, __( 'Are you sure you want to do this?' ) ); + } +} + +/** + * 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' ); + $html = esc_html( wp_explain_nonce( $action ) ); + if ( 'log-out' == $action ) + $html .= "</p><p>" . sprintf( __( "Do you really want to <a href='%s'>log out</a>?"), wp_logout_url() ); + elseif ( 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' ); + elseif ( defined( 'APP_REQUEST' ) && APP_REQUEST ) + $function = apply_filters( 'wp_die_app_handler', '_scalar_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) ) { + if ( empty( $title ) ) { $error_data = $message->get_error_data(); - if ( is_array($error_data) && isset($error_data['title']) ) + if ( is_array( $error_data ) && isset( $error_data['title'] ) ) $title = $error_data['title']; } $errors = $message->get_error_messages(); - switch ( count($errors) ) : + switch ( count( $errors ) ) : case 0 : $message = ''; break; @@ -1230,105 +2018,289 @@ function wp_die( $message, $title = '' ) { $message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $errors ) . "</li>\n\t</ul>"; break; endswitch; - } elseif ( is_string($message) ) { + } elseif ( is_string( $message ) ) { $message = "<p>$message</p>"; } - if ( defined('WP_SITEURL') && '' != WP_SITEURL ) - $admin_dir = WP_SITEURL.'/wp-admin/'; - elseif (function_exists('get_bloginfo') && '' != get_bloginfo('wpurl')) - $admin_dir = get_bloginfo('wpurl').'/wp-admin/'; - elseif (strpos($_SERVER['PHP_SELF'], 'wp-admin') !== false) - $admin_dir = ''; - else - $admin_dir = 'wp-admin/'; - - if ( !function_exists('did_action') || !did_action('admin_head') ) : - if( !headers_sent() ){ - status_header(500); - nocache_headers(); - header('Content-Type: text/html; charset=utf-8'); + if ( isset( $r['back_link'] ) && $r['back_link'] ) { + $back_text = $have_gettext? __('« Back') : '« Back'; + $message .= "\n<p><a href='javascript:history.back()'>$back_text</a></p>"; } - if ( empty($title) ){ - if( function_exists('__') ) - $title = __('WordPress › Error'); - else - $title = 'WordPress › Error'; - } + if ( ! did_action( 'admin_head' ) ) : + if ( !headers_sent() ) { + status_header( $r['response'] ); + nocache_headers(); + header( 'Content-Type: text/html; charset=utf-8' ); + } + if ( empty($title) ) + $title = $have_gettext ? __('WordPress › Error') : 'WordPress › Error'; + + $text_direction = 'ltr'; + if ( isset($r['text_direction']) && 'rtl' == $r['text_direction'] ) + $text_direction = 'rtl'; + elseif ( function_exists( 'is_rtl' ) && is_rtl() ) + $text_direction = 'rtl'; ?> -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> -<html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists('language_attributes') ) language_attributes(); ?>> +<!DOCTYPE html> +<!-- Ticket #11289, IE bug fix: always pad the error page with enough characters such that it is greater than 512 bytes, even after gzip compression abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono +--> +<html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) language_attributes(); else echo "dir='$text_direction'"; ?>> <head> - <title><?php echo $title ?> - -text_direction) ) : ?> - - + <?php echo $title ?> + - - -

WordPress

+ + - text_direction) { - echo 'directionality : "rtl" ,'; - echo 'theme_advanced_toolbar_align : "right" ,'; +/** + * 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( $error->getXml() ); } + die(); } -function _mce_load_rtl_plugin($input) { - global $wp_locale; - - if ('rtl' == $wp_locale->text_direction) - $input[] = 'directionality'; - - return $input; +/** + * 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) $message ); + die(); } -function _mce_add_direction_buttons($input) { - global $wp_locale; - - if ('rtl' == $wp_locale->text_direction) { - $new_buttons = array('separator', 'ltr', 'rtl'); - $input = array_merge($input, $new_buttons); +/** + * 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, $wp_smiliesreplace; + global $wpsmiliestrans, $wp_smiliessearch; // don't bother setting up smilies if they are disabled - if ( !get_option('use_smilies') ) + if ( !get_option( 'use_smilies' ) ) return; - if (!isset($wpsmiliestrans)) { + if ( !isset( $wpsmiliestrans ) ) { $wpsmiliestrans = array( ':mrgreen:' => 'icon_mrgreen.gif', ':neutral:' => 'icon_neutral.gif', @@ -1361,7 +2333,8 @@ function smilies_init() { ':-x' => 'icon_mad.gif', ':-|' => 'icon_neutral.gif', ';-)' => 'icon_wink.gif', - '8)' => 'icon_cool.gif', + // This one transformation breaks regular text with frequency. + // '8)' => 'icon_cool.gif', '8O' => 'icon_eek.gif', ':(' => 'icon_sad.gif', ':)' => 'icon_smile.gif', @@ -1377,54 +2350,250 @@ function smilies_init() { ); } - $siteurl = get_option('siteurl'); + if (count($wpsmiliestrans) == 0) { + return; + } + + /* + * 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); + + $wp_smiliessearch = '/(?:\s|^)'; + + $subchar = ''; foreach ( (array) $wpsmiliestrans as $smiley => $img ) { - $wp_smiliessearch[] = '/(\s|^)'.preg_quote($smiley, '/').'(\s|$)/'; - $smiley_masked = htmlspecialchars(trim($smiley), ENT_QUOTES); - $wp_smiliesreplace[] = " $smiley_masked "; + $firstchar = substr($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 { + $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); - else if ( is_array( $args ) ) + 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 ); - else - return $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 ( $m_value == $to_match[ $m_key ] ) + $matched++; + } -function wp_maybe_load_widgets() { - if ( !function_exists( 'dynamic_sidebar' ) ) { - require_once ABSPATH . WPINC . '/widgets.php'; - add_action( '_admin_menu', 'wp_widgets_add_menu' ); + if ( ( 'AND' == $operator && $matched == $count ) + || ( 'OR' == $operator && $matched > 0 ) + || ( 'NOT' == $operator && 0 == $matched ) ) { + $filtered[$key] = $obj; + } } + + return $filtered; } -function wp_widgets_add_menu() { - global $submenu; - $submenu['themes.php'][7] = array( __( 'Widgets' ), 'switch_themes', 'widgets.php' ); - ksort($submenu['themes.php'], SORT_NUMERIC); +/** + * 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 $list; } -// For PHP 5.2, make sure all output buffers are flushed -// before our singletons our destroyed. -function wp_ob_end_flush_all() -{ - while ( @ob_end_flush() ); +/** + * 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; + $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 the the WordPress 2.3.2, but originally was + * added in WordPress 2.5.0. + * + * @since 2.3.2 + * @uses $wpdb + */ function dead_db() { global $wpdb; // Load custom DB error template, if present. - if ( file_exists( ABSPATH . 'wp-content/db-error.php' ) ) { - require_once( ABSPATH . 'wp-content/db-error.php' ); + if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) { + require_once( WP_CONTENT_DIR . '/db-error.php' ); die(); } @@ -1436,19 +2605,1094 @@ function dead_db() { status_header( 500 ); nocache_headers(); header( 'Content-Type: text/html; charset=utf-8' ); + + wp_load_translations_early(); ?> - -> + +> - Database Error - + + <?php _e( 'Database Error' ); ?> + -

Error establishing a database connection

+

+/** + * 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 = preg_replace( '/^http:\/\//', 'https://', $url ); + + $ch = curl_init(); + curl_setopt($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 false; +} + +/** + * 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, $version ); + + // Allow plugin to filter the output error trigger + if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) { + if ( ! is_null($replacement) ) + trigger_error( sprintf( __('%1$s is deprecated since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) ); + else + trigger_error( sprintf( __('%1$s is deprecated since version %2$s with no alternative available.'), $function, $version ) ); + } +} + +/** + * 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 ( ! is_null( $replacement ) ) + trigger_error( sprintf( __('%1$s is deprecated since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message ); + else + trigger_error( sprintf( __('%1$s is deprecated since version %2$s with no alternative available.'), $file, $version ) . $message ); + } +} +/** + * Marks a function argument as deprecated and informs when it has been used. + * + * This function is to be used whenever a deprecated function argument is used. + * Before this function is called, the argument must be checked for whether it was + * used by comparing it to its default value or evaluating whether it is empty. + * For example: + * + * if ( !empty($deprecated) ) + * _deprecated_argument( __FUNCTION__, '3.0' ); + * + * + * 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 ( ! is_null( $message ) ) + trigger_error( sprintf( __('%1$s was called with an argument that is deprecated since version %2$s! %3$s'), $function, $version, $message ) ); + else + trigger_error( sprintf( __('%1$s was called with an argument that is deprecated since version %2$s with no alternative available.'), $function, $version ) ); + } +} + +/** + * 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 ) ) { + $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version ); + $message .= ' ' . __( 'Please see Debugging in WordPress for more information.' ); + trigger_error( sprintf( __( '%1$s was called incorrectly. %2$s %3$s' ), $function, $message, $version ) ); + } +} + +/** + * 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; + + 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, + * which is the case for PHP 4.X, then we cannot easily update the xml configuration file, + * hence we just bail out and tell user that pretty permalinks cannot be used. + * This is not a big issue because PHP 4.X is going to be deprecated and for IIS it + * is recommended to use PHP 5.X NTS. + * 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( $file, 1, 1 ) ) + return 2; + + return 0; +} + +/** + * Determine if SSL is used. + * + * @since 2.6.0 + * + * @return bool True if SSL, false if not used. + */ +function is_ssl() { + if ( isset($_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; +} + +/** + * 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://'; + $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, $current_blog; + + if ( !is_multisite() ) + return true; + + if ( !$blog_id ) + $blog_id = $current_blog->blog_id; + + return $blog_id == $current_site->blog_id; +} + +/** + * 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; + + 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; + } + + $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 ) / 3600, 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; + } + return strnatcasecmp( $a['t_continent'], $b['t_continent'] ); + } +} + +/** + * Gives a nicely formatted list of timezone strings. // temporary! Not in final + * + * @since 2.9.0 + * + * @param string $selected_zone Selected Zone + * @return string + */ +function wp_timezone_choice( $selected_zone ) { + static $mo_loaded = false; + + $continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific'); + + // Load translations for continents and cities + if ( !$mo_loaded ) { + $locale = get_locale(); + $mofile = WP_LANG_DIR . '/continents-cities-' . $locale . '.mo'; + load_textdomain( 'continents-cities', $mofile ); + $mo_loaded = true; + } + + $zonen = array(); + foreach ( timezone_identifiers_list() as $zone ) { + $zone = explode( '/', $zone ); + if ( !in_array( $zone[0], $continents ) ) { + continue; + } + + // 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] ); + + $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' ); + + $structure = array(); + + if ( empty( $selected_zone ) ) { + $structure[] = ''; + } + + foreach ( $zonen as $key => $zone ) { + // Build value in an array to join later + $value = array( $zone['continent'] ); + + 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 + + // Continent optgroup + if ( !isset( $zonen[$key - 1] ) || $zonen[$key - 1]['continent'] !== $zone['continent'] ) { + $label = $zone['t_continent']; + $structure[] = ''; + } + + // Add the city to the value + $value[] = $zone['city']; + + $display = $zone['t_city']; + if ( !empty( $zone['subcity'] ) ) { + // Add the subcity to the value + $value[] = $zone['subcity']; + $display .= ' - ' . $zone['t_subcity']; + } + } + + // Build the value + $value = join( '/', $value ); + $selected = ''; + if ( $value === $selected_zone ) { + $selected = 'selected="selected" '; + } + $structure[] = '"; + + // Close continent optgroup + if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) { + $structure[] = ''; + } + } + + // Do UTC + $structure[] = ''; + $selected = ''; + if ( 'UTC' === $selected_zone ) + $selected = 'selected="selected" '; + $structure[] = ''; + $structure[] = ''; + + // Do manual UTC offsets + $structure[] = ''; + $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[] = '"; + + } + $structure[] = ''; + + 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; + + $delete_timestamp = time() - (60*60*24*EMPTY_TRASH_DAYS); + + $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); + + foreach ( (array) $posts_to_delete as $post ) { + $post_id = (int) $post['post_id']; + if ( !$post_id ) + continue; + + $del_post = get_post($post_id); + + 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); + } + } + + $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); + + foreach ( (array) $comments_to_delete as $comment ) { + $comment_id = (int) $comment['comment_id']; + if ( !$comment_id ) + continue; + + $del_comment = get_comment($comment_id); + + 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); + } + } +} + +/** + * 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 ); + + // Make sure we catch CR-only line endings. + $file_data = str_replace( "\r", "\n", $file_data ); + + 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 ( $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; +} + +/** + * Returns false. + * + * Useful for returning false to filters easily. + * + * @since 3.0.0 + * @see __return_true() + * @return bool false + */ +function __return_false() { + return false; +} + +/** + * Returns 0. + * + * Useful for returning 0 to filters easily. + * + * @since 3.0.0 + * @see __return_zero() + * @return int 0 + */ +function __return_zero() { + return 0; +} + +/** + * 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 false; +} + +/** + * 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' ); + $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 ) { + $trace = debug_backtrace( false ); + $caller = array(); + $check_class = ! is_null( $ignore_class ); + $skip_frames++; // skip this function + + 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 + + $caller[] = "{$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; + } + } + + return $clean; +} + +/** + * 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; + + $ua = $_SERVER['HTTP_USER_AGENT']; + + if ( strpos($ua, 'iPhone') !== false + || strpos($ua, 'iPad') !== false + || strpos($ua, 'iPod') !== false ) { + return false; + } else { + return true; + } +} +