8 require( ABSPATH . WPINC . '/option.php' );
11 * Converts given date string into a different format.
13 * $format should be either a PHP date format string, e.g. 'U' for a Unix
14 * timestamp, or 'G' for a Unix timestamp assuming that $date is GMT.
16 * If $translate is true then the given date and format string will
17 * be passed to date_i18n() for translation.
21 * @param string $format Format of the date to return.
22 * @param string $date Date string to convert.
23 * @param bool $translate Whether the return date should be translated. Default is true.
24 * @return string|int Formatted date string, or Unix timestamp.
26 function mysql2date( $format, $date, $translate = true ) {
31 return strtotime( $date . ' +0000' );
33 $i = strtotime( $date );
39 return date_i18n( $format, $i );
41 return date( $format, $i );
45 * Retrieve the current time based on specified type.
47 * The 'mysql' type will return the time in the format for MySQL DATETIME field.
48 * The 'timestamp' type will return the current timestamp.
50 * If $gmt is set to either '1' or 'true', then both types will use GMT time.
51 * if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.
55 * @param string $type Either 'mysql' or 'timestamp'.
56 * @param int|bool $gmt Optional. Whether to use GMT timezone. Default is false.
57 * @return int|string String if $type is 'gmt', int if $type is 'timestamp'.
59 function current_time( $type, $gmt = 0 ) {
62 return ( $gmt ) ? gmdate( 'Y-m-d H:i:s' ) : gmdate( 'Y-m-d H:i:s', ( time() + ( get_option( 'gmt_offset' ) * 3600 ) ) );
65 return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * 3600 );
71 * Retrieve the date in localized format, based on timestamp.
73 * If the locale specifies the locale month and weekday, then the locale will
74 * take over the format for the date. If it isn't, then the date format string
75 * will be used instead.
79 * @param string $dateformatstring Format to display the date.
80 * @param int $unixtimestamp Optional. Unix timestamp.
81 * @param bool $gmt Optional, default is false. Whether to convert to GMT for time.
82 * @return string The date, translated if locale specifies it.
84 function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
90 $i = current_time( 'timestamp' );
93 // we should not let date() interfere with our
94 // specially computed timestamp
98 // store original value for language with untypical grammars
99 // see http://core.trac.wordpress.org/ticket/9396
100 $req_format = $dateformatstring;
102 $datefunc = $gmt? 'gmdate' : 'date';
104 if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
105 $datemonth = $wp_locale->get_month( $datefunc( 'm', $i ) );
106 $datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
107 $dateweekday = $wp_locale->get_weekday( $datefunc( 'w', $i ) );
108 $dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
109 $datemeridiem = $wp_locale->get_meridiem( $datefunc( 'a', $i ) );
110 $datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( 'A', $i ) );
111 $dateformatstring = ' '.$dateformatstring;
112 $dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
113 $dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );
114 $dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );
115 $dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
116 $dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );
117 $dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );
119 $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
121 $timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );
122 $timezone_formats_re = implode( '|', $timezone_formats );
123 if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {
124 $timezone_string = get_option( 'timezone_string' );
125 if ( $timezone_string ) {
126 $timezone_object = timezone_open( $timezone_string );
127 $date_object = date_create( null, $timezone_object );
128 foreach( $timezone_formats as $timezone_format ) {
129 if ( false !== strpos( $dateformatstring, $timezone_format ) ) {
130 $formatted = date_format( $date_object, $timezone_format );
131 $dateformatstring = ' '.$dateformatstring;
132 $dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );
133 $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
138 $j = @$datefunc( $dateformatstring, $i );
139 // allow plugins to redo this entirely for languages with untypical grammars
140 $j = apply_filters('date_i18n', $j, $req_format, $i, $gmt);
145 * Convert integer number to format based on the locale.
149 * @param int $number The number to convert based on locale.
150 * @param int $decimals Precision of the number of decimal places.
151 * @return string Converted number in string format.
153 function number_format_i18n( $number, $decimals = 0 ) {
155 $formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
156 return apply_filters( 'number_format_i18n', $formatted );
160 * Convert number of bytes largest unit bytes will fit into.
162 * It is easier to read 1kB than 1024 bytes and 1MB than 1048576 bytes. Converts
163 * number of bytes to human readable number by taking the number of that unit
164 * that the bytes will go into it. Supports TB value.
166 * Please note that integers in PHP are limited to 32 bits, unless they are on
167 * 64 bit architecture, then they have 64 bit size. If you need to place the
168 * larger size then what PHP integer type will hold, then use a string. It will
169 * be converted to a double, which should always have 64 bit length.
171 * Technically the correct unit names for powers of 1024 are KiB, MiB etc.
172 * @link http://en.wikipedia.org/wiki/Byte
176 * @param int|string $bytes Number of bytes. Note max integer size for integers.
177 * @param int $decimals Precision of number of decimal places. Deprecated.
178 * @return bool|string False on failure. Number string on success.
180 function size_format( $bytes, $decimals = 0 ) {
182 // ========================= Origin ====
183 'TB' => 1099511627776, // pow( 1024, 4)
184 'GB' => 1073741824, // pow( 1024, 3)
185 'MB' => 1048576, // pow( 1024, 2)
186 'kB' => 1024, // pow( 1024, 1)
187 'B ' => 1, // pow( 1024, 0)
189 foreach ( $quant as $unit => $mag )
190 if ( doubleval($bytes) >= $mag )
191 return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
197 * Get the week start and end from the datetime or date string from mysql.
201 * @param string $mysqlstring Date or datetime field type from mysql.
202 * @param int $start_of_week Optional. Start of the week as an integer.
203 * @return array Keys are 'start' and 'end'.
205 function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
206 $my = substr( $mysqlstring, 0, 4 ); // Mysql string Year
207 $mm = substr( $mysqlstring, 8, 2 ); // Mysql string Month
208 $md = substr( $mysqlstring, 5, 2 ); // Mysql string day
209 $day = mktime( 0, 0, 0, $md, $mm, $my ); // The timestamp for mysqlstring day.
210 $weekday = date( 'w', $day ); // The day of the week from the timestamp
211 if ( !is_numeric($start_of_week) )
212 $start_of_week = get_option( 'start_of_week' );
214 if ( $weekday < $start_of_week )
217 $start = $day - 86400 * ( $weekday - $start_of_week ); // The most recent week start day on or before $day
218 $end = $start + 604799; // $start + 7 days - 1 second
219 return compact( 'start', 'end' );
223 * Unserialize value only if it was serialized.
227 * @param string $original Maybe unserialized original, if is needed.
228 * @return mixed Unserialized data can be any type.
230 function maybe_unserialize( $original ) {
231 if ( is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
232 return @unserialize( $original );
237 * Check value to find if it was serialized.
239 * If $data is not an string, then returned value will always be false.
240 * Serialized data is always a string.
244 * @param mixed $data Value to check to see if was serialized.
245 * @return bool False if not serialized and true if it was.
247 function is_serialized( $data ) {
248 // if it isn't a string, it isn't serialized
249 if ( ! is_string( $data ) )
251 $data = trim( $data );
254 $length = strlen( $data );
257 if ( ':' !== $data[1] )
259 $lastc = $data[$length-1];
260 if ( ';' !== $lastc && '}' !== $lastc )
265 if ( '"' !== $data[$length-2] )
269 return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
273 return (bool) preg_match( "/^{$token}:[0-9.E-]+;\$/", $data );
279 * Check whether serialized data is of string type.
283 * @param mixed $data Serialized data
284 * @return bool False if not a serialized string, true if it is.
286 function is_serialized_string( $data ) {
287 // if it isn't a string, it isn't a serialized string
288 if ( !is_string( $data ) )
290 $data = trim( $data );
291 $length = strlen( $data );
294 elseif ( ':' !== $data[1] )
296 elseif ( ';' !== $data[$length-1] )
298 elseif ( $data[0] !== 's' )
300 elseif ( '"' !== $data[$length-2] )
307 * Serialize data, if needed.
311 * @param mixed $data Data that might be serialized.
312 * @return mixed A scalar data
314 function maybe_serialize( $data ) {
315 if ( is_array( $data ) || is_object( $data ) )
316 return serialize( $data );
318 // Double serialization is required for backward compatibility.
319 // See http://core.trac.wordpress.org/ticket/12930
320 if ( is_serialized( $data ) )
321 return serialize( $data );
327 * Retrieve post title from XMLRPC XML.
329 * If the title element is not part of the XML, then the default post title from
330 * the $post_default_title will be used instead.
336 * @global string $post_default_title Default XMLRPC post title.
338 * @param string $content XMLRPC XML Request content
339 * @return string Post title
341 function xmlrpc_getposttitle( $content ) {
342 global $post_default_title;
343 if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {
344 $post_title = $matchtitle[1];
346 $post_title = $post_default_title;
352 * Retrieve the post category or categories from XMLRPC XML.
354 * If the category element is not found, then the default post category will be
355 * used. The return type then would be what $post_default_category. If the
356 * category is found, then it will always be an array.
362 * @global string $post_default_category Default XMLRPC post category.
364 * @param string $content XMLRPC XML Request content
365 * @return string|array List of categories or category name.
367 function xmlrpc_getpostcategory( $content ) {
368 global $post_default_category;
369 if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {
370 $post_category = trim( $matchcat[1], ',' );
371 $post_category = explode( ',', $post_category );
373 $post_category = $post_default_category;
375 return $post_category;
379 * XMLRPC XML content without title and category elements.
385 * @param string $content XMLRPC XML Request content
386 * @return string XMLRPC XML Request content without title and category elements.
388 function xmlrpc_removepostdata( $content ) {
389 $content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );
390 $content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );
391 $content = trim( $content );
396 * Check content for video and audio links to add as enclosures.
398 * Will not add enclosures that have already been added and will
399 * remove enclosures that are no longer in the post. This is called as
400 * pingbacks and trackbacks.
407 * @param string $content Post Content
408 * @param int $post_ID Post ID
410 function do_enclose( $content, $post_ID ) {
413 //TODO: Tidy this ghetto code up and make the debug code optional
414 include_once( ABSPATH . WPINC . '/class-IXR.php' );
416 $post_links = array();
418 $pung = get_enclosed( $post_ID );
421 $gunk = '/#~:.?+=&%@!\-';
423 $any = $ltrs . $gunk . $punc;
425 preg_match_all( "{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp );
427 foreach ( $pung as $link_test ) {
428 if ( !in_array( $link_test, $post_links_temp[0] ) ) { // link no longer in post
429 $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 ) . '%') );
430 foreach ( $mids as $mid )
431 delete_metadata_by_mid( 'post', $mid );
435 foreach ( (array) $post_links_temp[0] as $link_test ) {
436 if ( !in_array( $link_test, $pung ) ) { // If we haven't pung it already
437 $test = @parse_url( $link_test );
438 if ( false === $test )
440 if ( isset( $test['query'] ) )
441 $post_links[] = $link_test;
442 elseif ( isset($test['path']) && ( $test['path'] != '/' ) && ($test['path'] != '' ) )
443 $post_links[] = $link_test;
447 foreach ( (array) $post_links as $url ) {
448 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 ) . '%' ) ) ) {
450 if ( $headers = wp_get_http_headers( $url) ) {
451 $len = isset( $headers['content-length'] ) ? (int) $headers['content-length'] : 0;
452 $type = isset( $headers['content-type'] ) ? $headers['content-type'] : '';
453 $allowed_types = array( 'video', 'audio' );
455 // Check to see if we can figure out the mime type from
457 $url_parts = @parse_url( $url );
458 if ( false !== $url_parts ) {
459 $extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );
460 if ( !empty( $extension ) ) {
461 foreach ( get_allowed_mime_types( ) as $exts => $mime ) {
462 if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
470 if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {
471 add_post_meta( $post_ID, 'enclosure', "$url\n$len\n$mime\n" );
479 * Perform a HTTP HEAD or GET request.
481 * If $file_path is a writable filename, this will do a GET request and write
482 * the file to that path.
486 * @param string $url URL to fetch.
487 * @param string|bool $file_path Optional. File path to write request to.
488 * @param int $red (private) The number of Redirects followed, Upon 5 being hit, returns false.
489 * @return bool|string False on failure and string of headers if HEAD request.
491 function wp_get_http( $url, $file_path = false, $red = 1 ) {
492 @set_time_limit( 60 );
498 $options['redirection'] = 5;
500 if ( false == $file_path )
501 $options['method'] = 'HEAD';
503 $options['method'] = 'GET';
505 $response = wp_remote_request($url, $options);
507 if ( is_wp_error( $response ) )
510 $headers = wp_remote_retrieve_headers( $response );
511 $headers['response'] = wp_remote_retrieve_response_code( $response );
513 // WP_HTTP no longer follows redirects for HEAD requests.
514 if ( 'HEAD' == $options['method'] && in_array($headers['response'], array(301, 302)) && isset( $headers['location'] ) ) {
515 return wp_get_http( $headers['location'], $file_path, ++$red );
518 if ( false == $file_path )
521 // GET request - write it to the supplied filename
522 $out_fp = fopen($file_path, 'w');
526 fwrite( $out_fp, wp_remote_retrieve_body( $response ) );
534 * Retrieve HTTP Headers from URL.
539 * @param bool $deprecated Not Used.
540 * @return bool|string False on failure, headers on success.
542 function wp_get_http_headers( $url, $deprecated = false ) {
543 if ( !empty( $deprecated ) )
544 _deprecated_argument( __FUNCTION__, '2.7' );
546 $response = wp_remote_head( $url );
548 if ( is_wp_error( $response ) )
551 return wp_remote_retrieve_headers( $response );
555 * Whether today is a new day.
559 * @uses $previousday Previous day
561 * @return int 1 when new day, 0 if not a new day.
563 function is_new_day() {
564 global $currentday, $previousday;
565 if ( $currentday != $previousday )
572 * Build URL query based on an associative and, or indexed array.
574 * This is a convenient function for easily building url queries. It sets the
575 * separator to '&' and uses _http_build_query() function.
577 * @see _http_build_query() Used to build the query
578 * @link http://us2.php.net/manual/en/function.http-build-query.php more on what
579 * http_build_query() does.
583 * @param array $data URL-encode key/value pairs.
584 * @return string URL encoded string
586 function build_query( $data ) {
587 return _http_build_query( $data, null, '&', '', false );
590 // from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
591 function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
594 foreach ( (array) $data as $k => $v ) {
597 if ( is_int($k) && $prefix != null )
600 $k = $key . '%5B' . $k . '%5D';
603 elseif ( $v === FALSE )
606 if ( is_array($v) || is_object($v) )
607 array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
608 elseif ( $urlencode )
609 array_push($ret, $k.'='.urlencode($v));
611 array_push($ret, $k.'='.$v);
615 $sep = ini_get('arg_separator.output');
617 return implode($sep, $ret);
621 * Retrieve a modified URL query string.
623 * You can rebuild the URL and append a new query variable to the URL query by
624 * using this function. You can also retrieve the full URL with query data.
626 * Adding a single key & value or an associative array. Setting a key value to
627 * an empty string removes the key. Omitting oldquery_or_uri uses the $_SERVER
628 * value. Additional values provided are expected to be encoded appropriately
629 * with urlencode() or rawurlencode().
633 * @param mixed $param1 Either newkey or an associative_array
634 * @param mixed $param2 Either newvalue or oldquery or uri
635 * @param mixed $param3 Optional. Old query or uri
636 * @return string New URL query string.
638 function add_query_arg() {
640 if ( is_array( func_get_arg(0) ) ) {
641 if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) )
642 $uri = $_SERVER['REQUEST_URI'];
644 $uri = @func_get_arg( 1 );
646 if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) )
647 $uri = $_SERVER['REQUEST_URI'];
649 $uri = @func_get_arg( 2 );
652 if ( $frag = strstr( $uri, '#' ) )
653 $uri = substr( $uri, 0, -strlen( $frag ) );
657 if ( preg_match( '|^https?://|i', $uri, $matches ) ) {
658 $protocol = $matches[0];
659 $uri = substr( $uri, strlen( $protocol ) );
664 if ( strpos( $uri, '?' ) !== false ) {
665 $parts = explode( '?', $uri, 2 );
666 if ( 1 == count( $parts ) ) {
670 $base = $parts[0] . '?';
673 } elseif ( !empty( $protocol ) || strpos( $uri, '=' ) === false ) {
681 wp_parse_str( $query, $qs );
682 $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
683 if ( is_array( func_get_arg( 0 ) ) ) {
684 $kayvees = func_get_arg( 0 );
685 $qs = array_merge( $qs, $kayvees );
687 $qs[func_get_arg( 0 )] = func_get_arg( 1 );
690 foreach ( (array) $qs as $k => $v ) {
695 $ret = build_query( $qs );
696 $ret = trim( $ret, '?' );
697 $ret = preg_replace( '#=(&|$)#', '$1', $ret );
698 $ret = $protocol . $base . $ret . $frag;
699 $ret = rtrim( $ret, '?' );
704 * Removes an item or list from the query string.
708 * @param string|array $key Query key or keys to remove.
709 * @param bool $query When false uses the $_SERVER value.
710 * @return string New URL query string.
712 function remove_query_arg( $key, $query=false ) {
713 if ( is_array( $key ) ) { // removing multiple keys
714 foreach ( $key as $k )
715 $query = add_query_arg( $k, false, $query );
718 return add_query_arg( $key, false, $query );
722 * Walks the array while sanitizing the contents.
726 * @param array $array Array to used to walk while sanitizing contents.
727 * @return array Sanitized $array.
729 function add_magic_quotes( $array ) {
730 foreach ( (array) $array as $k => $v ) {
731 if ( is_array( $v ) ) {
732 $array[$k] = add_magic_quotes( $v );
734 $array[$k] = addslashes( $v );
741 * HTTP request for URI to retrieve content.
744 * @uses wp_remote_get()
746 * @param string $uri URI/URL of web page to retrieve.
747 * @return bool|string HTTP content. False on failure.
749 function wp_remote_fopen( $uri ) {
750 $parsed_url = @parse_url( $uri );
752 if ( !$parsed_url || !is_array( $parsed_url ) )
756 $options['timeout'] = 10;
758 $response = wp_remote_get( $uri, $options );
760 if ( is_wp_error( $response ) )
763 return wp_remote_retrieve_body( $response );
767 * Set up the WordPress query.
771 * @param string $query_vars Default WP_Query arguments.
773 function wp( $query_vars = '' ) {
774 global $wp, $wp_query, $wp_the_query;
775 $wp->main( $query_vars );
777 if ( !isset($wp_the_query) )
778 $wp_the_query = $wp_query;
782 * Retrieve the description for the HTTP status.
786 * @param int $code HTTP status code.
787 * @return string Empty string if not found, or description if found.
789 function get_status_header_desc( $code ) {
790 global $wp_header_to_desc;
792 $code = absint( $code );
794 if ( !isset( $wp_header_to_desc ) ) {
795 $wp_header_to_desc = array(
797 101 => 'Switching Protocols',
803 203 => 'Non-Authoritative Information',
805 205 => 'Reset Content',
806 206 => 'Partial Content',
807 207 => 'Multi-Status',
810 300 => 'Multiple Choices',
811 301 => 'Moved Permanently',
814 304 => 'Not Modified',
817 307 => 'Temporary Redirect',
819 400 => 'Bad Request',
820 401 => 'Unauthorized',
821 402 => 'Payment Required',
824 405 => 'Method Not Allowed',
825 406 => 'Not Acceptable',
826 407 => 'Proxy Authentication Required',
827 408 => 'Request Timeout',
830 411 => 'Length Required',
831 412 => 'Precondition Failed',
832 413 => 'Request Entity Too Large',
833 414 => 'Request-URI Too Long',
834 415 => 'Unsupported Media Type',
835 416 => 'Requested Range Not Satisfiable',
836 417 => 'Expectation Failed',
837 422 => 'Unprocessable Entity',
839 424 => 'Failed Dependency',
840 426 => 'Upgrade Required',
842 500 => 'Internal Server Error',
843 501 => 'Not Implemented',
844 502 => 'Bad Gateway',
845 503 => 'Service Unavailable',
846 504 => 'Gateway Timeout',
847 505 => 'HTTP Version Not Supported',
848 506 => 'Variant Also Negotiates',
849 507 => 'Insufficient Storage',
850 510 => 'Not Extended'
854 if ( isset( $wp_header_to_desc[$code] ) )
855 return $wp_header_to_desc[$code];
861 * Set HTTP status header.
864 * @uses apply_filters() Calls 'status_header' on status header string, HTTP
865 * HTTP code, HTTP code description, and protocol string as separate
868 * @param int $header HTTP status code
871 function status_header( $header ) {
872 $text = get_status_header_desc( $header );
874 if ( empty( $text ) )
877 $protocol = $_SERVER["SERVER_PROTOCOL"];
878 if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
879 $protocol = 'HTTP/1.0';
880 $status_header = "$protocol $header $text";
881 if ( function_exists( 'apply_filters' ) )
882 $status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol );
884 return @header( $status_header, true, $header );
888 * Gets the header information to prevent caching.
890 * The several different headers cover the different ways cache prevention is handled
891 * by different browsers
895 * @uses apply_filters()
896 * @return array The associative array of header names and field values.
898 function wp_get_nocache_headers() {
900 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
901 'Last-Modified' => gmdate( 'D, d M Y H:i:s' ) . ' GMT',
902 'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
903 'Pragma' => 'no-cache',
906 if ( function_exists('apply_filters') ) {
907 $headers = (array) apply_filters('nocache_headers', $headers);
913 * Sets the headers to prevent caching for the different browsers.
915 * Different browsers support different nocache headers, so several headers must
916 * be sent so that all of them get the point that no caching should occur.
919 * @uses wp_get_nocache_headers()
921 function nocache_headers() {
922 $headers = wp_get_nocache_headers();
923 foreach( $headers as $name => $field_value )
924 @header("{$name}: {$field_value}");
928 * Set the headers for caching for 10 days with JavaScript content type.
932 function cache_javascript_headers() {
933 $expiresOffset = 864000; // 10 days
934 header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );
935 header( "Vary: Accept-Encoding" ); // Handle proxies
936 header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
940 * Retrieve the number of database queries during the WordPress execution.
944 * @return int Number of database queries
946 function get_num_queries() {
948 return $wpdb->num_queries;
952 * Whether input is yes or no. Must be 'y' to be true.
956 * @param string $yn Character string containing either 'y' or 'n'
957 * @return bool True if yes, false on anything else
959 function bool_from_yn( $yn ) {
960 return ( strtolower( $yn ) == 'y' );
964 * Loads the feed template from the use of an action hook.
966 * If the feed action does not have a hook, then the function will die with a
967 * message telling the visitor that the feed is not valid.
969 * It is better to only have one hook for each feed.
972 * @uses $wp_query Used to tell if the use a comment feed.
973 * @uses do_action() Calls 'do_feed_$feed' hook, if a hook exists for the feed.
978 $feed = get_query_var( 'feed' );
980 // Remove the pad, if present.
981 $feed = preg_replace( '/^_+/', '', $feed );
983 if ( $feed == '' || $feed == 'feed' )
984 $feed = get_default_feed();
986 $hook = 'do_feed_' . $feed;
987 if ( !has_action($hook) ) {
988 $message = sprintf( __( 'ERROR: %s is not a valid feed template.' ), esc_html($feed));
989 wp_die( $message, '', array( 'response' => 404 ) );
992 do_action( $hook, $wp_query->is_comment_feed );
996 * Load the RDF RSS 0.91 Feed template.
1000 function do_feed_rdf() {
1001 load_template( ABSPATH . WPINC . '/feed-rdf.php' );
1005 * Load the RSS 1.0 Feed Template.
1009 function do_feed_rss() {
1010 load_template( ABSPATH . WPINC . '/feed-rss.php' );
1014 * Load either the RSS2 comment feed or the RSS2 posts feed.
1018 * @param bool $for_comments True for the comment feed, false for normal feed.
1020 function do_feed_rss2( $for_comments ) {
1021 if ( $for_comments )
1022 load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );
1024 load_template( ABSPATH . WPINC . '/feed-rss2.php' );
1028 * Load either Atom comment feed or Atom posts feed.
1032 * @param bool $for_comments True for the comment feed, false for normal feed.
1034 function do_feed_atom( $for_comments ) {
1036 load_template( ABSPATH . WPINC . '/feed-atom-comments.php');
1038 load_template( ABSPATH . WPINC . '/feed-atom.php' );
1042 * Display the robots.txt file content.
1044 * The echo content should be with usage of the permalinks or for creating the
1048 * @uses do_action() Calls 'do_robotstxt' hook for displaying robots.txt rules.
1050 function do_robots() {
1051 header( 'Content-Type: text/plain; charset=utf-8' );
1053 do_action( 'do_robotstxt' );
1055 $output = "User-agent: *\n";
1056 $public = get_option( 'blog_public' );
1057 if ( '0' == $public ) {
1058 $output .= "Disallow: /\n";
1060 $site_url = parse_url( site_url() );
1061 $path = ( !empty( $site_url['path'] ) ) ? $site_url['path'] : '';
1062 $output .= "Disallow: $path/wp-admin/\n";
1063 $output .= "Disallow: $path/wp-includes/\n";
1066 echo apply_filters('robots_txt', $output, $public);
1070 * Test whether blog is already installed.
1072 * The cache will be checked first. If you have a cache plugin, which saves the
1073 * cache values, then this will work. If you use the default WordPress cache,
1074 * and the database goes away, then you might have problems.
1076 * Checks for the option siteurl for whether WordPress is installed.
1081 * @return bool Whether blog is already installed.
1083 function is_blog_installed() {
1086 // Check cache first. If options table goes away and we have true cached, oh well.
1087 if ( wp_cache_get( 'is_blog_installed' ) )
1090 $suppress = $wpdb->suppress_errors();
1091 if ( ! defined( 'WP_INSTALLING' ) ) {
1092 $alloptions = wp_load_alloptions();
1094 // If siteurl is not set to autoload, check it specifically
1095 if ( !isset( $alloptions['siteurl'] ) )
1096 $installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
1098 $installed = $alloptions['siteurl'];
1099 $wpdb->suppress_errors( $suppress );
1101 $installed = !empty( $installed );
1102 wp_cache_set( 'is_blog_installed', $installed );
1107 // If visiting repair.php, return true and let it take over.
1108 if ( defined( 'WP_REPAIRING' ) )
1111 $suppress = $wpdb->suppress_errors();
1113 // Loop over the WP tables. If none exist, then scratch install is allowed.
1114 // If one or more exist, suggest table repair since we got here because the options
1115 // table could not be accessed.
1116 $wp_tables = $wpdb->tables();
1117 foreach ( $wp_tables as $table ) {
1118 // The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
1119 if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
1121 if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
1124 if ( ! $wpdb->get_results( "DESCRIBE $table;" ) )
1127 // One or more tables exist. We are insane.
1129 wp_load_translations_early();
1131 // Die with a DB error.
1132 $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' );
1136 $wpdb->suppress_errors( $suppress );
1138 wp_cache_set( 'is_blog_installed', false );
1144 * Retrieve URL with nonce added to URL query.
1146 * @package WordPress
1147 * @subpackage Security
1150 * @param string $actionurl URL to add nonce action
1151 * @param string $action Optional. Nonce action name
1152 * @return string URL with nonce action added.
1154 function wp_nonce_url( $actionurl, $action = -1 ) {
1155 $actionurl = str_replace( '&', '&', $actionurl );
1156 return esc_html( add_query_arg( '_wpnonce', wp_create_nonce( $action ), $actionurl ) );
1160 * Retrieve or display nonce hidden field for forms.
1162 * The nonce field is used to validate that the contents of the form came from
1163 * the location on the current site and not somewhere else. The nonce does not
1164 * offer absolute protection, but should protect against most cases. It is very
1165 * important to use nonce field in forms.
1167 * The $action and $name are optional, but if you want to have better security,
1168 * it is strongly suggested to set those two parameters. It is easier to just
1169 * call the function without any parameters, because validation of the nonce
1170 * doesn't require any parameters, but since crackers know what the default is
1171 * it won't be difficult for them to find a way around your nonce and cause
1174 * The input name will be whatever $name value you gave. The input value will be
1175 * the nonce creation value.
1177 * @package WordPress
1178 * @subpackage Security
1181 * @param string $action Optional. Action name.
1182 * @param string $name Optional. Nonce name.
1183 * @param bool $referer Optional, default true. Whether to set the referer field for validation.
1184 * @param bool $echo Optional, default true. Whether to display or return hidden form field.
1185 * @return string Nonce field.
1187 function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
1188 $name = esc_attr( $name );
1189 $nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
1192 $nonce_field .= wp_referer_field( false );
1197 return $nonce_field;
1201 * Retrieve or display referer hidden field for forms.
1203 * The referer link is the current Request URI from the server super global. The
1204 * input name is '_wp_http_referer', in case you wanted to check manually.
1206 * @package WordPress
1207 * @subpackage Security
1210 * @param bool $echo Whether to echo or return the referer field.
1211 * @return string Referer field.
1213 function wp_referer_field( $echo = true ) {
1214 $ref = esc_attr( $_SERVER['REQUEST_URI'] );
1215 $referer_field = '<input type="hidden" name="_wp_http_referer" value="'. $ref . '" />';
1218 echo $referer_field;
1219 return $referer_field;
1223 * Retrieve or display original referer hidden field for forms.
1225 * The input name is '_wp_original_http_referer' and will be either the same
1226 * value of {@link wp_referer_field()}, if that was posted already or it will
1227 * be the current page, if it doesn't exist.
1229 * @package WordPress
1230 * @subpackage Security
1233 * @param bool $echo Whether to echo the original http referer
1234 * @param string $jump_back_to Optional, default is 'current'. Can be 'previous' or page you want to jump back to.
1235 * @return string Original referer field.
1237 function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {
1238 $jump_back_to = ( 'previous' == $jump_back_to ) ? wp_get_referer() : $_SERVER['REQUEST_URI'];
1239 $ref = ( wp_get_original_referer() ) ? wp_get_original_referer() : $jump_back_to;
1240 $orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( stripslashes( $ref ) ) . '" />';
1242 echo $orig_referer_field;
1243 return $orig_referer_field;
1247 * Retrieve referer from '_wp_http_referer' or HTTP referer. If it's the same
1248 * as the current request URL, will return false.
1250 * @package WordPress
1251 * @subpackage Security
1254 * @return string|bool False on failure. Referer URL on success.
1256 function wp_get_referer() {
1258 if ( ! empty( $_REQUEST['_wp_http_referer'] ) )
1259 $ref = $_REQUEST['_wp_http_referer'];
1260 else if ( ! empty( $_SERVER['HTTP_REFERER'] ) )
1261 $ref = $_SERVER['HTTP_REFERER'];
1263 if ( $ref && $ref !== $_SERVER['REQUEST_URI'] )
1269 * Retrieve original referer that was posted, if it exists.
1271 * @package WordPress
1272 * @subpackage Security
1275 * @return string|bool False if no original referer or original referer if set.
1277 function wp_get_original_referer() {
1278 if ( !empty( $_REQUEST['_wp_original_http_referer'] ) )
1279 return $_REQUEST['_wp_original_http_referer'];
1284 * Recursive directory creation based on full path.
1286 * Will attempt to set permissions on folders.
1290 * @param string $target Full path to attempt to create.
1291 * @return bool Whether the path was created. True if path already exists.
1293 function wp_mkdir_p( $target ) {
1294 // from php.net/mkdir user contributed notes
1295 $target = str_replace( '//', '/', $target );
1297 // safe mode fails with a trailing slash under certain PHP versions.
1298 $target = rtrim($target, '/'); // Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
1299 if ( empty($target) )
1302 if ( file_exists( $target ) )
1303 return @is_dir( $target );
1305 // Attempting to create the directory may clutter up our display.
1306 if ( @mkdir( $target ) ) {
1307 $stat = @stat( dirname( $target ) );
1308 $dir_perms = $stat['mode'] & 0007777; // Get the permission bits.
1309 @chmod( $target, $dir_perms );
1311 } elseif ( is_dir( dirname( $target ) ) ) {
1315 // If the above failed, attempt to create the parent node, then try again.
1316 if ( ( $target != '/' ) && ( wp_mkdir_p( dirname( $target ) ) ) )
1317 return wp_mkdir_p( $target );
1323 * Test if a give filesystem path is absolute ('/foo/bar', 'c:\windows').
1327 * @param string $path File path
1328 * @return bool True if path is absolute, false is not absolute.
1330 function path_is_absolute( $path ) {
1331 // this is definitive if true but fails if $path does not exist or contains a symbolic link
1332 if ( realpath($path) == $path )
1335 if ( strlen($path) == 0 || $path[0] == '.' )
1338 // windows allows absolute paths like this
1339 if ( preg_match('#^[a-zA-Z]:\\\\#', $path) )
1342 // a path starting with / or \ is absolute; anything else is relative
1343 return ( $path[0] == '/' || $path[0] == '\\' );
1347 * Join two filesystem paths together (e.g. 'give me $path relative to $base').
1349 * If the $path is absolute, then it the full path is returned.
1353 * @param string $base
1354 * @param string $path
1355 * @return string The path with the base or absolute path.
1357 function path_join( $base, $path ) {
1358 if ( path_is_absolute($path) )
1361 return rtrim($base, '/') . '/' . ltrim($path, '/');
1365 * Determines a writable directory for temporary files.
1366 * 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/
1368 * 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.
1372 * @return string Writable temporary directory
1374 function get_temp_dir() {
1376 if ( defined('WP_TEMP_DIR') )
1377 return trailingslashit(WP_TEMP_DIR);
1380 return trailingslashit($temp);
1382 $temp = WP_CONTENT_DIR . '/';
1383 if ( is_dir($temp) && @is_writable($temp) )
1386 if ( function_exists('sys_get_temp_dir') ) {
1387 $temp = sys_get_temp_dir();
1388 if ( @is_writable($temp) )
1389 return trailingslashit($temp);
1392 $temp = ini_get('upload_tmp_dir');
1393 if ( is_dir($temp) && @is_writable($temp) )
1394 return trailingslashit($temp);
1401 * Get an array containing the current upload directory's path and url.
1403 * Checks the 'upload_path' option, which should be from the web root folder,
1404 * and if it isn't empty it will be used. If it is empty, then the path will be
1405 * 'WP_CONTENT_DIR/uploads'. If the 'UPLOADS' constant is defined, then it will
1406 * override the 'upload_path' option and 'WP_CONTENT_DIR/uploads' path.
1408 * The upload URL path is set either by the 'upload_url_path' option or by using
1409 * the 'WP_CONTENT_URL' constant and appending '/uploads' to the path.
1411 * If the 'uploads_use_yearmonth_folders' is set to true (checkbox if checked in
1412 * the administration settings panel), then the time will be used. The format
1413 * will be year first and then month.
1415 * If the path couldn't be created, then an error will be returned with the key
1416 * 'error' containing the error message. The error suggests that the parent
1417 * directory is not writable by the server.
1419 * On success, the returned array will have many indices:
1420 * 'path' - base directory and sub directory or full path to upload directory.
1421 * 'url' - base url and sub directory or absolute URL to upload directory.
1422 * 'subdir' - sub directory if uploads use year/month folders option is on.
1423 * 'basedir' - path without subdir.
1424 * 'baseurl' - URL path without subdir.
1425 * 'error' - set to false.
1428 * @uses apply_filters() Calls 'upload_dir' on returned array.
1430 * @param string $time Optional. Time formatted in 'yyyy/mm'.
1431 * @return array See above for description.
1433 function wp_upload_dir( $time = null ) {
1435 $siteurl = get_option( 'siteurl' );
1436 $upload_path = get_option( 'upload_path' );
1437 $upload_path = trim($upload_path);
1438 $main_override = is_multisite() && defined( 'MULTISITE' ) && is_main_site();
1439 if ( empty($upload_path) ) {
1440 $dir = WP_CONTENT_DIR . '/uploads';
1442 $dir = $upload_path;
1443 if ( 'wp-content/uploads' == $upload_path ) {
1444 $dir = WP_CONTENT_DIR . '/uploads';
1445 } elseif ( 0 !== strpos($dir, ABSPATH) ) {
1446 // $dir is absolute, $upload_path is (maybe) relative to ABSPATH
1447 $dir = path_join( ABSPATH, $dir );
1451 if ( !$url = get_option( 'upload_url_path' ) ) {
1452 if ( empty($upload_path) || ( 'wp-content/uploads' == $upload_path ) || ( $upload_path == $dir ) )
1453 $url = WP_CONTENT_URL . '/uploads';
1455 $url = trailingslashit( $siteurl ) . $upload_path;
1458 if ( defined('UPLOADS') && !$main_override && ( !isset( $switched ) || $switched === false ) ) {
1459 $dir = ABSPATH . UPLOADS;
1460 $url = trailingslashit( $siteurl ) . UPLOADS;
1463 if ( is_multisite() && !$main_override && ( !isset( $switched ) || $switched === false ) ) {
1464 if ( defined( 'BLOGUPLOADDIR' ) )
1465 $dir = untrailingslashit(BLOGUPLOADDIR);
1466 $url = str_replace( UPLOADS, 'files', $url );
1473 if ( get_option( 'uploads_use_yearmonth_folders' ) ) {
1474 // Generate the yearly and monthly dirs
1476 $time = current_time( 'mysql' );
1477 $y = substr( $time, 0, 4 );
1478 $m = substr( $time, 5, 2 );
1485 $uploads = apply_filters( 'upload_dir', array( 'path' => $dir, 'url' => $url, 'subdir' => $subdir, 'basedir' => $bdir, 'baseurl' => $burl, 'error' => false ) );
1487 // Make sure we have an uploads dir
1488 if ( ! wp_mkdir_p( $uploads['path'] ) ) {
1489 if ( 0 === strpos( $uploads['basedir'], ABSPATH ) )
1490 $error_path = str_replace( ABSPATH, '', $uploads['basedir'] ) . $uploads['subdir'];
1492 $error_path = basename( $uploads['basedir'] ) . $uploads['subdir'];
1494 $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
1495 return array( 'error' => $message );
1502 * Get a filename that is sanitized and unique for the given directory.
1504 * If the filename is not unique, then a number will be added to the filename
1505 * before the extension, and will continue adding numbers until the filename is
1508 * The callback is passed three parameters, the first one is the directory, the
1509 * second is the filename, and the third is the extension.
1513 * @param string $dir
1514 * @param string $filename
1515 * @param mixed $unique_filename_callback Callback.
1516 * @return string New filename, if given wasn't unique.
1518 function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
1519 // sanitize the file name before we begin processing
1520 $filename = sanitize_file_name($filename);
1522 // separate the filename into a name and extension
1523 $info = pathinfo($filename);
1524 $ext = !empty($info['extension']) ? '.' . $info['extension'] : '';
1525 $name = basename($filename, $ext);
1527 // edge case: if file is named '.ext', treat as an empty name
1528 if ( $name === $ext )
1531 // Increment the file number until we have a unique file to save in $dir. Use callback if supplied.
1532 if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
1533 $filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
1537 // change '.ext' to lower case
1538 if ( $ext && strtolower($ext) != $ext ) {
1539 $ext2 = strtolower($ext);
1540 $filename2 = preg_replace( '|' . preg_quote($ext) . '$|', $ext2, $filename );
1542 // check for both lower and upper case extension or image sub-sizes may be overwritten
1543 while ( file_exists($dir . "/$filename") || file_exists($dir . "/$filename2") ) {
1544 $new_number = $number + 1;
1545 $filename = str_replace( "$number$ext", "$new_number$ext", $filename );
1546 $filename2 = str_replace( "$number$ext2", "$new_number$ext2", $filename2 );
1547 $number = $new_number;
1552 while ( file_exists( $dir . "/$filename" ) ) {
1553 if ( '' == "$number$ext" )
1554 $filename = $filename . ++$number . $ext;
1556 $filename = str_replace( "$number$ext", ++$number . $ext, $filename );
1564 * Create a file in the upload folder with given content.
1566 * If there is an error, then the key 'error' will exist with the error message.
1567 * If success, then the key 'file' will have the unique file path, the 'url' key
1568 * will have the link to the new file. and the 'error' key will be set to false.
1570 * This function will not move an uploaded file to the upload folder. It will
1571 * create a new file with the content in $bits parameter. If you move the upload
1572 * file, read the content of the uploaded file, and then you can give the
1573 * filename and content to this function, which will add it to the upload
1576 * The permissions will be set on the new file automatically by this function.
1580 * @param string $name
1581 * @param null $deprecated Never used. Set to null.
1582 * @param mixed $bits File content
1583 * @param string $time Optional. Time formatted in 'yyyy/mm'.
1586 function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
1587 if ( !empty( $deprecated ) )
1588 _deprecated_argument( __FUNCTION__, '2.0' );
1590 if ( empty( $name ) )
1591 return array( 'error' => __( 'Empty filename' ) );
1593 $wp_filetype = wp_check_filetype( $name );
1594 if ( !$wp_filetype['ext'] )
1595 return array( 'error' => __( 'Invalid file type' ) );
1597 $upload = wp_upload_dir( $time );
1599 if ( $upload['error'] !== false )
1602 $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) );
1603 if ( !is_array( $upload_bits_error ) ) {
1604 $upload[ 'error' ] = $upload_bits_error;
1608 $filename = wp_unique_filename( $upload['path'], $name );
1610 $new_file = $upload['path'] . "/$filename";
1611 if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
1612 if ( 0 === strpos( $upload['basedir'], ABSPATH ) )
1613 $error_path = str_replace( ABSPATH, '', $upload['basedir'] ) . $upload['subdir'];
1615 $error_path = basename( $upload['basedir'] ) . $upload['subdir'];
1617 $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
1618 return array( 'error' => $message );
1621 $ifp = @ fopen( $new_file, 'wb' );
1623 return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) );
1625 @fwrite( $ifp, $bits );
1629 // Set correct file permissions
1630 $stat = @ stat( dirname( $new_file ) );
1631 $perms = $stat['mode'] & 0007777;
1632 $perms = $perms & 0000666;
1633 @ chmod( $new_file, $perms );
1637 $url = $upload['url'] . "/$filename";
1639 return array( 'file' => $new_file, 'url' => $url, 'error' => false );
1643 * Retrieve the file type based on the extension name.
1645 * @package WordPress
1647 * @uses apply_filters() Calls 'ext2type' hook on default supported types.
1649 * @param string $ext The extension to search.
1650 * @return string|null The file type, example: audio, video, document, spreadsheet, etc. Null if not found.
1652 function wp_ext2type( $ext ) {
1653 $ext2type = apply_filters( 'ext2type', array(
1654 'audio' => array( 'aac', 'ac3', 'aif', 'aiff', 'm3a', 'm4a', 'm4b', 'mka', 'mp1', 'mp2', 'mp3', 'ogg', 'oga', 'ram', 'wav', 'wma' ),
1655 'video' => array( 'asf', 'avi', 'divx', 'dv', 'flv', 'm4v', 'mkv', 'mov', 'mp4', 'mpeg', 'mpg', 'mpv', 'ogm', 'ogv', 'qt', 'rm', 'vob', 'wmv' ),
1656 'document' => array( 'doc', 'docx', 'docm', 'dotm', 'odt', 'pages', 'pdf', 'rtf', 'wp', 'wpd' ),
1657 'spreadsheet' => array( 'numbers', 'ods', 'xls', 'xlsx', 'xlsb', 'xlsm' ),
1658 'interactive' => array( 'key', 'ppt', 'pptx', 'pptm', 'odp', 'swf' ),
1659 'text' => array( 'asc', 'csv', 'tsv', 'txt' ),
1660 'archive' => array( 'bz2', 'cab', 'dmg', 'gz', 'rar', 'sea', 'sit', 'sqx', 'tar', 'tgz', 'zip', '7z' ),
1661 'code' => array( 'css', 'htm', 'html', 'php', 'js' ),
1663 foreach ( $ext2type as $type => $exts )
1664 if ( in_array( $ext, $exts ) )
1669 * Retrieve the file type from the file name.
1671 * You can optionally define the mime array, if needed.
1675 * @param string $filename File name or path.
1676 * @param array $mimes Optional. Key is the file extension with value as the mime type.
1677 * @return array Values with extension first and mime type.
1679 function wp_check_filetype( $filename, $mimes = null ) {
1680 if ( empty($mimes) )
1681 $mimes = get_allowed_mime_types();
1685 foreach ( $mimes as $ext_preg => $mime_match ) {
1686 $ext_preg = '!\.(' . $ext_preg . ')$!i';
1687 if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
1688 $type = $mime_match;
1689 $ext = $ext_matches[1];
1694 return compact( 'ext', 'type' );
1698 * Attempt to determine the real file type of a file.
1699 * If unable to, the file name extension will be used to determine type.
1701 * If it's determined that the extension does not match the file's real type,
1702 * then the "proper_filename" value will be set with a proper filename and extension.
1704 * Currently this function only supports validating images known to getimagesize().
1708 * @param string $file Full path to the image.
1709 * @param string $filename The filename of the image (may differ from $file due to $file being in a tmp directory)
1710 * @param array $mimes Optional. Key is the file extension with value as the mime type.
1711 * @return array Values for the extension, MIME, and either a corrected filename or false if original $filename is valid
1713 function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
1715 $proper_filename = false;
1717 // Do basic extension validation and MIME mapping
1718 $wp_filetype = wp_check_filetype( $filename, $mimes );
1719 extract( $wp_filetype );
1721 // We can't do any further validation without a file to work with
1722 if ( ! file_exists( $file ) )
1723 return compact( 'ext', 'type', 'proper_filename' );
1725 // We're able to validate images using GD
1726 if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
1728 // Attempt to figure out what type of image it actually is
1729 $imgstats = @getimagesize( $file );
1731 // If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
1732 if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
1733 // This is a simplified array of MIMEs that getimagesize() can detect and their extensions
1734 // You shouldn't need to use this filter, but it's here just in case
1735 $mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(
1736 'image/jpeg' => 'jpg',
1737 'image/png' => 'png',
1738 'image/gif' => 'gif',
1739 'image/bmp' => 'bmp',
1740 'image/tiff' => 'tif',
1743 // Replace whatever is after the last period in the filename with the correct extension
1744 if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
1745 $filename_parts = explode( '.', $filename );
1746 array_pop( $filename_parts );
1747 $filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
1748 $new_filename = implode( '.', $filename_parts );
1750 if ( $new_filename != $filename )
1751 $proper_filename = $new_filename; // Mark that it changed
1753 // Redefine the extension / MIME
1754 $wp_filetype = wp_check_filetype( $new_filename, $mimes );
1755 extract( $wp_filetype );
1760 // Let plugins try and validate other types of files
1761 // Should return an array in the style of array( 'ext' => $ext, 'type' => $type, 'proper_filename' => $proper_filename )
1762 return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
1766 * Retrieve list of allowed mime types and file extensions.
1770 * @return array Array of mime types keyed by the file extension regex corresponding to those types.
1772 function get_allowed_mime_types() {
1773 static $mimes = false;
1776 // Accepted MIME types are set here as PCRE unless provided.
1777 $mimes = apply_filters( 'upload_mimes', array(
1778 'jpg|jpeg|jpe' => 'image/jpeg',
1779 'gif' => 'image/gif',
1780 'png' => 'image/png',
1781 'bmp' => 'image/bmp',
1782 'tif|tiff' => 'image/tiff',
1783 'ico' => 'image/x-icon',
1784 'asf|asx|wax|wmv|wmx' => 'video/asf',
1785 'avi' => 'video/avi',
1786 'divx' => 'video/divx',
1787 'flv' => 'video/x-flv',
1788 'mov|qt' => 'video/quicktime',
1789 'mpeg|mpg|mpe' => 'video/mpeg',
1790 'txt|asc|c|cc|h' => 'text/plain',
1791 'csv' => 'text/csv',
1792 'tsv' => 'text/tab-separated-values',
1793 'ics' => 'text/calendar',
1794 'rtx' => 'text/richtext',
1795 'css' => 'text/css',
1796 'htm|html' => 'text/html',
1797 'mp3|m4a|m4b' => 'audio/mpeg',
1798 'mp4|m4v' => 'video/mp4',
1799 'ra|ram' => 'audio/x-realaudio',
1800 'wav' => 'audio/wav',
1801 'ogg|oga' => 'audio/ogg',
1802 'ogv' => 'video/ogg',
1803 'mid|midi' => 'audio/midi',
1804 'wma' => 'audio/wma',
1805 'mka' => 'audio/x-matroska',
1806 'mkv' => 'video/x-matroska',
1807 'rtf' => 'application/rtf',
1808 'js' => 'application/javascript',
1809 'pdf' => 'application/pdf',
1810 'doc|docx' => 'application/msword',
1811 'pot|pps|ppt|pptx|ppam|pptm|sldm|ppsm|potm' => 'application/vnd.ms-powerpoint',
1812 'wri' => 'application/vnd.ms-write',
1813 'xla|xls|xlsx|xlt|xlw|xlam|xlsb|xlsm|xltm' => 'application/vnd.ms-excel',
1814 'mdb' => 'application/vnd.ms-access',
1815 'mpp' => 'application/vnd.ms-project',
1816 'docm|dotm' => 'application/vnd.ms-word',
1817 'pptx|sldx|ppsx|potx' => 'application/vnd.openxmlformats-officedocument.presentationml',
1818 'xlsx|xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml',
1819 'docx|dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml',
1820 'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
1821 'swf' => 'application/x-shockwave-flash',
1822 'class' => 'application/java',
1823 'tar' => 'application/x-tar',
1824 'zip' => 'application/zip',
1825 'gz|gzip' => 'application/x-gzip',
1826 'rar' => 'application/rar',
1827 '7z' => 'application/x-7z-compressed',
1828 'exe' => 'application/x-msdownload',
1829 // openoffice formats
1830 'odt' => 'application/vnd.oasis.opendocument.text',
1831 'odp' => 'application/vnd.oasis.opendocument.presentation',
1832 'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
1833 'odg' => 'application/vnd.oasis.opendocument.graphics',
1834 'odc' => 'application/vnd.oasis.opendocument.chart',
1835 'odb' => 'application/vnd.oasis.opendocument.database',
1836 'odf' => 'application/vnd.oasis.opendocument.formula',
1837 // wordperfect formats
1838 'wp|wpd' => 'application/wordperfect',
1846 * Retrieve nonce action "Are you sure" message.
1848 * Deprecated in 3.4.1 and 3.5.0. Backported to 3.3.3.
1852 * @deprecated Use wp_nonce_ays()
1853 * @see wp_nonce_ays()
1855 * @param string $action Nonce action.
1856 * @return string Are you sure message.
1858 function wp_explain_nonce( $action ) {
1859 _deprecated_function( __FUNCTION__, '3.4.1', 'wp_nonce_ays()' );
1860 return __( 'Are you sure you want to do this?' );
1864 * Display "Are You Sure" message to confirm the action being taken.
1866 * If the action has the nonce explain message, then it will be displayed along
1867 * with the "Are you sure?" message.
1869 * @package WordPress
1870 * @subpackage Security
1873 * @param string $action The nonce action.
1875 function wp_nonce_ays( $action ) {
1876 $title = __( 'WordPress Failure Notice' );
1877 if ( 'log-out' == $action ) {
1878 $html = sprintf( __( 'You are attempting to log out of %s' ), get_bloginfo( 'name' ) ) . '</p><p>';
1879 $html .= sprintf( __( "Do you really want to <a href='%s'>log out</a>?"), wp_logout_url() );
1881 $html = __( 'Are you sure you want to do this?' );
1882 if ( wp_get_referer() )
1883 $html .= "</p><p><a href='" . esc_url( remove_query_arg( 'updated', wp_get_referer() ) ) . "'>" . __( 'Please try again.' ) . "</a>";
1886 wp_die( $html, $title, array('response' => 403) );
1890 * Kill WordPress execution and display HTML message with error message.
1892 * This function complements the die() PHP function. The difference is that
1893 * HTML will be displayed to the user. It is recommended to use this function
1894 * only, when the execution should not continue any further. It is not
1895 * recommended to call this function very often and try to handle as many errors
1896 * as possible silently.
1900 * @param string $message Error message.
1901 * @param string $title Error title.
1902 * @param string|array $args Optional arguments to control behavior.
1904 function wp_die( $message = '', $title = '', $args = array() ) {
1905 if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
1906 $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );
1907 elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST )
1908 $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' );
1909 elseif ( defined( 'APP_REQUEST' ) && APP_REQUEST )
1910 $function = apply_filters( 'wp_die_app_handler', '_scalar_wp_die_handler' );
1912 $function = apply_filters( 'wp_die_handler', '_default_wp_die_handler' );
1914 call_user_func( $function, $message, $title, $args );
1918 * Kill WordPress execution and display HTML message with error message.
1920 * This is the default handler for wp_die if you want a custom one for your
1921 * site then you can overload using the wp_die_handler filter in wp_die
1926 * @param string $message Error message.
1927 * @param string $title Error title.
1928 * @param string|array $args Optional arguments to control behavior.
1930 function _default_wp_die_handler( $message, $title = '', $args = array() ) {
1931 $defaults = array( 'response' => 500 );
1932 $r = wp_parse_args($args, $defaults);
1934 $have_gettext = function_exists('__');
1936 if ( function_exists( 'is_wp_error' ) && is_wp_error( $message ) ) {
1937 if ( empty( $title ) ) {
1938 $error_data = $message->get_error_data();
1939 if ( is_array( $error_data ) && isset( $error_data['title'] ) )
1940 $title = $error_data['title'];
1942 $errors = $message->get_error_messages();
1943 switch ( count( $errors ) ) :
1948 $message = "<p>{$errors[0]}</p>";
1951 $message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $errors ) . "</li>\n\t</ul>";
1954 } elseif ( is_string( $message ) ) {
1955 $message = "<p>$message</p>";
1958 if ( isset( $r['back_link'] ) && $r['back_link'] ) {
1959 $back_text = $have_gettext? __('« Back') : '« Back';
1960 $message .= "\n<p><a href='javascript:history.back()'>$back_text</a></p>";
1963 if ( ! did_action( 'admin_head' ) ) :
1964 if ( !headers_sent() ) {
1965 status_header( $r['response'] );
1967 header( 'Content-Type: text/html; charset=utf-8' );
1970 if ( empty($title) )
1971 $title = $have_gettext ? __('WordPress › Error') : 'WordPress › Error';
1973 $text_direction = 'ltr';
1974 if ( isset($r['text_direction']) && 'rtl' == $r['text_direction'] )
1975 $text_direction = 'rtl';
1976 elseif ( function_exists( 'is_rtl' ) && is_rtl() )
1977 $text_direction = 'rtl';
1980 <!-- Ticket #11289, IE bug fix: always pad the error page with enough characters such that it is greater than 512 bytes, even after gzip compression abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono
1982 <html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) language_attributes(); else echo "dir='$text_direction'"; ?>>
1984 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1985 <title><?php echo $title ?></title>
1986 <style type="text/css">
1988 background: #f9f9f9;
1993 font-family: sans-serif;
1996 -webkit-border-radius: 3px;
1998 border: 1px solid #dfdfdf;
2002 border-bottom: 1px solid #dadada;
2005 font: 24px Georgia, "Times New Roman", Times, serif;
2008 padding-bottom: 7px;
2016 margin: 25px 0 20px;
2019 font-family: Consolas, Monaco, monospace;
2022 margin-bottom: 10px;
2027 text-decoration: none;
2034 font-family: sans-serif;
2035 text-decoration: none;
2036 font-size: 14px !important;
2040 border: 1px solid #bbb;
2042 -webkit-border-radius: 15px;
2043 border-radius: 15px;
2044 -moz-box-sizing: content-box;
2045 -webkit-box-sizing: content-box;
2046 box-sizing: content-box;
2047 background-color: #f5f5f5;
2048 background-image: -ms-linear-gradient(top, #ffffff, #f2f2f2);
2049 background-image: -moz-linear-gradient(top, #ffffff, #f2f2f2);
2050 background-image: -o-linear-gradient(top, #ffffff, #f2f2f2);
2051 background-image: -webkit-gradient(linear, left top, left bottom, from(#ffffff), to(#f2f2f2));
2052 background-image: -webkit-linear-gradient(top, #ffffff, #f2f2f2);
2053 background-image: linear-gradient(top, #ffffff, #f2f2f2);
2062 background-image: -ms-linear-gradient(top, #f2f2f2, #ffffff);
2063 background-image: -moz-linear-gradient(top, #f2f2f2, #ffffff);
2064 background-image: -o-linear-gradient(top, #f2f2f2, #ffffff);
2065 background-image: -webkit-gradient(linear, left top, left bottom, from(#f2f2f2), to(#ffffff));
2066 background-image: -webkit-linear-gradient(top, #f2f2f2, #ffffff);
2067 background-image: linear-gradient(top, #f2f2f2, #ffffff);
2070 <?php if ( 'rtl' == $text_direction ) : ?>
2071 body { font-family: Tahoma, Arial; }
2075 <body id="error-page">
2076 <?php endif; // ! did_action( 'admin_head' ) ?>
2077 <?php echo $message; ?>
2085 * Kill WordPress execution and display XML message with error message.
2087 * This is the handler for wp_die when processing XMLRPC requests.
2092 * @param string $message Error message.
2093 * @param string $title Error title.
2094 * @param string|array $args Optional arguments to control behavior.
2096 function _xmlrpc_wp_die_handler( $message, $title = '', $args = array() ) {
2097 global $wp_xmlrpc_server;
2098 $defaults = array( 'response' => 500 );
2100 $r = wp_parse_args($args, $defaults);
2102 if ( $wp_xmlrpc_server ) {
2103 $error = new IXR_Error( $r['response'] , $message);
2104 $wp_xmlrpc_server->output( $error->getXml() );
2110 * Kill WordPress ajax execution.
2112 * This is the handler for wp_die when processing Ajax requests.
2117 * @param string $message Optional. Response to print.
2119 function _ajax_wp_die_handler( $message = '' ) {
2120 if ( is_scalar( $message ) )
2121 die( (string) $message );
2126 * Kill WordPress execution.
2128 * This is the handler for wp_die when processing APP requests.
2133 * @param string $message Optional. Response to print.
2135 function _scalar_wp_die_handler( $message = '' ) {
2136 if ( is_scalar( $message ) )
2137 die( (string) $message );
2142 * Retrieve the WordPress home page URL.
2144 * If the constant named 'WP_HOME' exists, then it will be used and returned by
2145 * the function. This can be used to counter the redirection on your local
2146 * development environment.
2149 * @package WordPress
2152 * @param string $url URL for the home location
2153 * @return string Homepage location.
2155 function _config_wp_home( $url = '' ) {
2156 if ( defined( 'WP_HOME' ) )
2157 return untrailingslashit( WP_HOME );
2162 * Retrieve the WordPress site URL.
2164 * If the constant named 'WP_SITEURL' is defined, then the value in that
2165 * constant will always be returned. This can be used for debugging a site on
2166 * your localhost while not having to change the database to your URL.
2169 * @package WordPress
2172 * @param string $url URL to set the WordPress site location.
2173 * @return string The WordPress Site URL
2175 function _config_wp_siteurl( $url = '' ) {
2176 if ( defined( 'WP_SITEURL' ) )
2177 return untrailingslashit( WP_SITEURL );
2182 * Set the localized direction for MCE plugin.
2184 * Will only set the direction to 'rtl', if the WordPress locale has the text
2185 * direction set to 'rtl'.
2187 * Fills in the 'directionality', 'plugins', and 'theme_advanced_button1' array
2188 * keys. These keys are then returned in the $input array.
2191 * @package WordPress
2195 * @param array $input MCE plugin array.
2196 * @return array Direction set for 'rtl', if needed by locale.
2198 function _mce_set_direction( $input ) {
2200 $input['directionality'] = 'rtl';
2201 $input['plugins'] .= ',directionality';
2202 $input['theme_advanced_buttons1'] .= ',ltr';
2209 * Convert smiley code to the icon graphic file equivalent.
2211 * You can turn off smilies, by going to the write setting screen and unchecking
2212 * the box, or by setting 'use_smilies' option to false or removing the option.
2214 * Plugins may override the default smiley list by setting the $wpsmiliestrans
2215 * to an array, with the key the code the blogger types in and the value the
2218 * The $wp_smiliessearch global is for the regular expression and is set each
2219 * time the function is called.
2221 * The full list of smilies can be found in the function and won't be listed in
2222 * the description. Probably should create a Codex page for it, so that it is
2225 * @global array $wpsmiliestrans
2226 * @global array $wp_smiliessearch
2229 function smilies_init() {
2230 global $wpsmiliestrans, $wp_smiliessearch;
2232 // don't bother setting up smilies if they are disabled
2233 if ( !get_option( 'use_smilies' ) )
2236 if ( !isset( $wpsmiliestrans ) ) {
2237 $wpsmiliestrans = array(
2238 ':mrgreen:' => 'icon_mrgreen.gif',
2239 ':neutral:' => 'icon_neutral.gif',
2240 ':twisted:' => 'icon_twisted.gif',
2241 ':arrow:' => 'icon_arrow.gif',
2242 ':shock:' => 'icon_eek.gif',
2243 ':smile:' => 'icon_smile.gif',
2244 ':???:' => 'icon_confused.gif',
2245 ':cool:' => 'icon_cool.gif',
2246 ':evil:' => 'icon_evil.gif',
2247 ':grin:' => 'icon_biggrin.gif',
2248 ':idea:' => 'icon_idea.gif',
2249 ':oops:' => 'icon_redface.gif',
2250 ':razz:' => 'icon_razz.gif',
2251 ':roll:' => 'icon_rolleyes.gif',
2252 ':wink:' => 'icon_wink.gif',
2253 ':cry:' => 'icon_cry.gif',
2254 ':eek:' => 'icon_surprised.gif',
2255 ':lol:' => 'icon_lol.gif',
2256 ':mad:' => 'icon_mad.gif',
2257 ':sad:' => 'icon_sad.gif',
2258 '8-)' => 'icon_cool.gif',
2259 '8-O' => 'icon_eek.gif',
2260 ':-(' => 'icon_sad.gif',
2261 ':-)' => 'icon_smile.gif',
2262 ':-?' => 'icon_confused.gif',
2263 ':-D' => 'icon_biggrin.gif',
2264 ':-P' => 'icon_razz.gif',
2265 ':-o' => 'icon_surprised.gif',
2266 ':-x' => 'icon_mad.gif',
2267 ':-|' => 'icon_neutral.gif',
2268 ';-)' => 'icon_wink.gif',
2269 // This one transformation breaks regular text with frequency.
2270 // '8)' => 'icon_cool.gif',
2271 '8O' => 'icon_eek.gif',
2272 ':(' => 'icon_sad.gif',
2273 ':)' => 'icon_smile.gif',
2274 ':?' => 'icon_confused.gif',
2275 ':D' => 'icon_biggrin.gif',
2276 ':P' => 'icon_razz.gif',
2277 ':o' => 'icon_surprised.gif',
2278 ':x' => 'icon_mad.gif',
2279 ':|' => 'icon_neutral.gif',
2280 ';)' => 'icon_wink.gif',
2281 ':!:' => 'icon_exclaim.gif',
2282 ':?:' => 'icon_question.gif',
2286 if (count($wpsmiliestrans) == 0) {
2291 * NOTE: we sort the smilies in reverse key order. This is to make sure
2292 * we match the longest possible smilie (:???: vs :?) as the regular
2293 * expression used below is first-match
2295 krsort($wpsmiliestrans);
2297 $wp_smiliessearch = '/(?:\s|^)';
2300 foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
2301 $firstchar = substr($smiley, 0, 1);
2302 $rest = substr($smiley, 1);
2305 if ($firstchar != $subchar) {
2306 if ($subchar != '') {
2307 $wp_smiliessearch .= ')|(?:\s|^)';
2309 $subchar = $firstchar;
2310 $wp_smiliessearch .= preg_quote($firstchar, '/') . '(?:';
2312 $wp_smiliessearch .= '|';
2314 $wp_smiliessearch .= preg_quote($rest, '/');
2317 $wp_smiliessearch .= ')(?:\s|$)/m';
2321 * Merge user defined arguments into defaults array.
2323 * This function is used throughout WordPress to allow for both string or array
2324 * to be merged into another array.
2328 * @param string|array $args Value to merge with $defaults
2329 * @param array $defaults Array that serves as the defaults.
2330 * @return array Merged user defined values with defaults.
2332 function wp_parse_args( $args, $defaults = '' ) {
2333 if ( is_object( $args ) )
2334 $r = get_object_vars( $args );
2335 elseif ( is_array( $args ) )
2338 wp_parse_str( $args, $r );
2340 if ( is_array( $defaults ) )
2341 return array_merge( $defaults, $r );
2346 * Clean up an array, comma- or space-separated list of IDs.
2350 * @param array|string $list
2351 * @return array Sanitized array of IDs
2353 function wp_parse_id_list( $list ) {
2354 if ( !is_array($list) )
2355 $list = preg_split('/[\s,]+/', $list);
2357 return array_unique(array_map('absint', $list));
2361 * Extract a slice of an array, given a list of keys.
2365 * @param array $array The original array
2366 * @param array $keys The list of keys
2367 * @return array The array slice
2369 function wp_array_slice_assoc( $array, $keys ) {
2371 foreach ( $keys as $key )
2372 if ( isset( $array[ $key ] ) )
2373 $slice[ $key ] = $array[ $key ];
2379 * Filters a list of objects, based on a set of key => value arguments.
2383 * @param array $list An array of objects to filter
2384 * @param array $args An array of key => value arguments to match against each object
2385 * @param string $operator The logical operation to perform. 'or' means only one element
2386 * from the array needs to match; 'and' means all elements must match. The default is 'and'.
2387 * @param bool|string $field A field from the object to place instead of the entire object
2388 * @return array A list of objects or object fields
2390 function wp_filter_object_list( $list, $args = array(), $operator = 'and', $field = false ) {
2391 if ( ! is_array( $list ) )
2394 $list = wp_list_filter( $list, $args, $operator );
2397 $list = wp_list_pluck( $list, $field );
2403 * Filters a list of objects, based on a set of key => value arguments.
2407 * @param array $list An array of objects to filter
2408 * @param array $args An array of key => value arguments to match against each object
2409 * @param string $operator The logical operation to perform:
2410 * 'AND' means all elements from the array must match;
2411 * 'OR' means only one element needs to match;
2412 * 'NOT' means no elements may match.
2413 * The default is 'AND'.
2416 function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
2417 if ( ! is_array( $list ) )
2420 if ( empty( $args ) )
2423 $operator = strtoupper( $operator );
2424 $count = count( $args );
2425 $filtered = array();
2427 foreach ( $list as $key => $obj ) {
2428 $to_match = (array) $obj;
2431 foreach ( $args as $m_key => $m_value ) {
2432 if ( $m_value == $to_match[ $m_key ] )
2436 if ( ( 'AND' == $operator && $matched == $count )
2437 || ( 'OR' == $operator && $matched > 0 )
2438 || ( 'NOT' == $operator && 0 == $matched ) ) {
2439 $filtered[$key] = $obj;
2447 * Pluck a certain field out of each object in a list.
2451 * @param array $list A list of objects or arrays
2452 * @param int|string $field A field from the object to place instead of the entire object
2455 function wp_list_pluck( $list, $field ) {
2456 foreach ( $list as $key => $value ) {
2457 if ( is_object( $value ) )
2458 $list[ $key ] = $value->$field;
2460 $list[ $key ] = $value[ $field ];
2467 * Determines if Widgets library should be loaded.
2469 * Checks to make sure that the widgets library hasn't already been loaded. If
2470 * it hasn't, then it will load the widgets library and run an action hook.
2473 * @uses add_action() Calls '_admin_menu' hook with 'wp_widgets_add_menu' value.
2475 function wp_maybe_load_widgets() {
2476 if ( ! apply_filters('load_default_widgets', true) )
2478 require_once( ABSPATH . WPINC . '/default-widgets.php' );
2479 add_action( '_admin_menu', 'wp_widgets_add_menu' );
2483 * Append the Widgets menu to the themes main menu.
2486 * @uses $submenu The administration submenu list.
2488 function wp_widgets_add_menu() {
2490 $submenu['themes.php'][7] = array( __( 'Widgets' ), 'edit_theme_options', 'widgets.php' );
2491 ksort( $submenu['themes.php'], SORT_NUMERIC );
2495 * Flush all output buffers for PHP 5.2.
2497 * Make sure all output buffers are flushed before our singletons our destroyed.
2501 function wp_ob_end_flush_all() {
2502 $levels = ob_get_level();
2503 for ($i=0; $i<$levels; $i++)
2508 * Load custom DB error or display WordPress DB error.
2510 * If a file exists in the wp-content directory named db-error.php, then it will
2511 * be loaded instead of displaying the WordPress DB error. If it is not found,
2512 * then the WordPress DB error will be displayed instead.
2514 * The WordPress DB error sets the HTTP status header to 500 to try to prevent
2515 * search engines from caching the message. Custom DB messages should do the
2518 * This function was backported to the the WordPress 2.3.2, but originally was
2519 * added in WordPress 2.5.0.
2524 function dead_db() {
2527 // Load custom DB error template, if present.
2528 if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
2529 require_once( WP_CONTENT_DIR . '/db-error.php' );
2533 // If installing or in the admin, provide the verbose message.
2534 if ( defined('WP_INSTALLING') || defined('WP_ADMIN') )
2535 wp_die($wpdb->error);
2537 // Otherwise, be terse.
2538 status_header( 500 );
2540 header( 'Content-Type: text/html; charset=utf-8' );
2542 wp_load_translations_early();
2545 <html xmlns="http://www.w3.org/1999/xhtml"<?php if ( is_rtl() ) echo ' dir="rtl"'; ?>>
2547 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
2548 <title><?php _e( 'Database Error' ); ?></title>
2552 <h1><?php _e( 'Error establishing a database connection' ); ?></h1>
2560 * Converts value to nonnegative integer.
2564 * @param mixed $maybeint Data you wish to have converted to a nonnegative integer
2565 * @return int An nonnegative integer
2567 function absint( $maybeint ) {
2568 return abs( intval( $maybeint ) );
2572 * Determines if the blog can be accessed over SSL.
2574 * Determines if blog can be accessed over SSL by using cURL to access the site
2575 * using the https in the siteurl. Requires cURL extension to work correctly.
2579 * @param string $url
2580 * @return bool Whether SSL access is available
2582 function url_is_accessable_via_ssl($url)
2584 if (in_array('curl', get_loaded_extensions())) {
2585 $ssl = preg_replace( '/^http:\/\//', 'https://', $url );
2588 curl_setopt($ch, CURLOPT_URL, $ssl);
2589 curl_setopt($ch, CURLOPT_FAILONERROR, true);
2590 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
2591 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
2592 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
2596 $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
2599 if ($status == 200 || $status == 401) {
2607 * Marks a function as deprecated and informs when it has been used.
2609 * There is a hook deprecated_function_run that will be called that can be used
2610 * to get the backtrace up to what file and function called the deprecated
2613 * The current behavior is to trigger a user error if WP_DEBUG is true.
2615 * This function is to be used in every function that is deprecated.
2617 * @package WordPress
2622 * @uses do_action() Calls 'deprecated_function_run' and passes the function name, what to use instead,
2623 * and the version the function was deprecated in.
2624 * @uses apply_filters() Calls 'deprecated_function_trigger_error' and expects boolean value of true to do
2625 * trigger or false to not trigger error.
2627 * @param string $function The function that was called
2628 * @param string $version The version of WordPress that deprecated the function
2629 * @param string $replacement Optional. The function that should have been called
2631 function _deprecated_function( $function, $version, $replacement = null ) {
2633 do_action( 'deprecated_function_run', $function, $replacement, $version );
2635 // Allow plugin to filter the output error trigger
2636 if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
2637 if ( ! is_null($replacement) )
2638 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
2640 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2645 * Marks a file as deprecated and informs when it has been used.
2647 * There is a hook deprecated_file_included that will be called that can be used
2648 * to get the backtrace up to what file and function included the deprecated
2651 * The current behavior is to trigger a user error if WP_DEBUG is true.
2653 * This function is to be used in every file that is deprecated.
2655 * @package WordPress
2660 * @uses do_action() Calls 'deprecated_file_included' and passes the file name, what to use instead,
2661 * the version in which the file was deprecated, and any message regarding the change.
2662 * @uses apply_filters() Calls 'deprecated_file_trigger_error' and expects boolean value of true to do
2663 * trigger or false to not trigger error.
2665 * @param string $file The file that was included
2666 * @param string $version The version of WordPress that deprecated the file
2667 * @param string $replacement Optional. The file that should have been included based on ABSPATH
2668 * @param string $message Optional. A message regarding the change
2670 function _deprecated_file( $file, $version, $replacement = null, $message = '' ) {
2672 do_action( 'deprecated_file_included', $file, $replacement, $version, $message );
2674 // Allow plugin to filter the output error trigger
2675 if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
2676 $message = empty( $message ) ? '' : ' ' . $message;
2677 if ( ! is_null( $replacement ) )
2678 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message );
2680 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message );
2684 * Marks a function argument as deprecated and informs when it has been used.
2686 * This function is to be used whenever a deprecated function argument is used.
2687 * Before this function is called, the argument must be checked for whether it was
2688 * used by comparing it to its default value or evaluating whether it is empty.
2691 * if ( !empty($deprecated) )
2692 * _deprecated_argument( __FUNCTION__, '3.0' );
2695 * There is a hook deprecated_argument_run that will be called that can be used
2696 * to get the backtrace up to what file and function used the deprecated
2699 * The current behavior is to trigger a user error if WP_DEBUG is true.
2701 * @package WordPress
2706 * @uses do_action() Calls 'deprecated_argument_run' and passes the function name, a message on the change,
2707 * and the version in which the argument was deprecated.
2708 * @uses apply_filters() Calls 'deprecated_argument_trigger_error' and expects boolean value of true to do
2709 * trigger or false to not trigger error.
2711 * @param string $function The function that was called
2712 * @param string $version The version of WordPress that deprecated the argument used
2713 * @param string $message Optional. A message regarding the change.
2715 function _deprecated_argument( $function, $version, $message = null ) {
2717 do_action( 'deprecated_argument_run', $function, $message, $version );
2719 // Allow plugin to filter the output error trigger
2720 if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
2721 if ( ! is_null( $message ) )
2722 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) );
2724 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2729 * Marks something as being incorrectly called.
2731 * There is a hook doing_it_wrong_run that will be called that can be used
2732 * to get the backtrace up to what file and function called the deprecated
2735 * The current behavior is to trigger a user error if WP_DEBUG is true.
2737 * @package WordPress
2742 * @uses do_action() Calls 'doing_it_wrong_run' and passes the function arguments.
2743 * @uses apply_filters() Calls 'doing_it_wrong_trigger_error' and expects boolean value of true to do
2744 * trigger or false to not trigger error.
2746 * @param string $function The function that was called.
2747 * @param string $message A message explaining what has been done incorrectly.
2748 * @param string $version The version of WordPress where the message was added.
2750 function _doing_it_wrong( $function, $message, $version ) {
2752 do_action( 'doing_it_wrong_run', $function, $message, $version );
2754 // Allow plugin to filter the output error trigger
2755 if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
2756 $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
2757 $message .= ' ' . __( 'Please see <a href="http://codex.wordpress.org/Debugging_in_WordPress">Debugging in WordPress</a> for more information.' );
2758 trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
2763 * Is the server running earlier than 1.5.0 version of lighttpd?
2767 * @return bool Whether the server is running lighttpd < 1.5.0
2769 function is_lighttpd_before_150() {
2770 $server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] )? $_SERVER['SERVER_SOFTWARE'] : '' );
2771 $server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : '';
2772 return 'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
2776 * Does the specified module exist in the Apache config?
2780 * @param string $mod e.g. mod_rewrite
2781 * @param bool $default The default return value if the module is not found
2784 function apache_mod_loaded($mod, $default = false) {
2790 if ( function_exists('apache_get_modules') ) {
2791 $mods = apache_get_modules();
2792 if ( in_array($mod, $mods) )
2794 } elseif ( function_exists('phpinfo') ) {
2797 $phpinfo = ob_get_clean();
2798 if ( false !== strpos($phpinfo, $mod) )
2805 * Check if IIS 7 supports pretty permalinks.
2811 function iis7_supports_permalinks() {
2814 $supports_permalinks = false;
2816 /* First we check if the DOMDocument class exists. If it does not exist,
2817 * which is the case for PHP 4.X, then we cannot easily update the xml configuration file,
2818 * hence we just bail out and tell user that pretty permalinks cannot be used.
2819 * This is not a big issue because PHP 4.X is going to be deprecated and for IIS it
2820 * is recommended to use PHP 5.X NTS.
2821 * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
2822 * URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
2823 * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
2824 * via ISAPI then pretty permalinks will not work.
2826 $supports_permalinks = class_exists('DOMDocument') && isset($_SERVER['IIS_UrlRewriteModule']) && ( php_sapi_name() == 'cgi-fcgi' );
2829 return apply_filters('iis7_supports_permalinks', $supports_permalinks);
2833 * File validates against allowed set of defined rules.
2835 * A return value of '1' means that the $file contains either '..' or './'. A
2836 * return value of '2' means that the $file contains ':' after the first
2837 * character. A return value of '3' means that the file is not in the allowed
2842 * @param string $file File path.
2843 * @param array $allowed_files List of allowed files.
2844 * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
2846 function validate_file( $file, $allowed_files = '' ) {
2847 if ( false !== strpos( $file, '..' ) )
2850 if ( false !== strpos( $file, './' ) )
2853 if ( ! empty( $allowed_files ) && ! in_array( $file, $allowed_files ) )
2856 if (':' == substr( $file, 1, 1 ) )
2863 * Determine if SSL is used.
2867 * @return bool True if SSL, false if not used.
2870 if ( isset($_SERVER['HTTPS']) ) {
2871 if ( 'on' == strtolower($_SERVER['HTTPS']) )
2873 if ( '1' == $_SERVER['HTTPS'] )
2875 } elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
2882 * Whether SSL login should be forced.
2886 * @param string|bool $force Optional.
2887 * @return bool True if forced, false if not forced.
2889 function force_ssl_login( $force = null ) {
2890 static $forced = false;
2892 if ( !is_null( $force ) ) {
2893 $old_forced = $forced;
2902 * Whether to force SSL used for the Administration Screens.
2906 * @param string|bool $force
2907 * @return bool True if forced, false if not forced.
2909 function force_ssl_admin( $force = null ) {
2910 static $forced = false;
2912 if ( !is_null( $force ) ) {
2913 $old_forced = $forced;
2922 * Guess the URL for the site.
2924 * Will remove wp-admin links to retrieve only return URLs not in the wp-admin
2931 function wp_guess_url() {
2932 if ( defined('WP_SITEURL') && '' != WP_SITEURL ) {
2935 $schema = is_ssl() ? 'https://' : 'http://';
2936 $url = preg_replace('#/(wp-admin/.*|wp-login.php)#i', '', $schema . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
2938 return rtrim($url, '/');
2942 * Temporarily suspend cache additions.
2944 * Stops more data being added to the cache, but still allows cache retrieval.
2945 * This is useful for actions, such as imports, when a lot of data would otherwise
2946 * be almost uselessly added to the cache.
2948 * Suspension lasts for a single page load at most. Remember to call this
2949 * function again if you wish to re-enable cache adds earlier.
2953 * @param bool $suspend Optional. Suspends additions if true, re-enables them if false.
2954 * @return bool The current suspend setting
2956 function wp_suspend_cache_addition( $suspend = null ) {
2957 static $_suspend = false;
2959 if ( is_bool( $suspend ) )
2960 $_suspend = $suspend;
2966 * Suspend cache invalidation.
2968 * Turns cache invalidation on and off. Useful during imports where you don't wont to do invalidations
2969 * every time a post is inserted. Callers must be sure that what they are doing won't lead to an inconsistent
2970 * cache when invalidation is suspended.
2974 * @param bool $suspend Whether to suspend or enable cache invalidation
2975 * @return bool The current suspend setting
2977 function wp_suspend_cache_invalidation($suspend = true) {
2978 global $_wp_suspend_cache_invalidation;
2980 $current_suspend = $_wp_suspend_cache_invalidation;
2981 $_wp_suspend_cache_invalidation = $suspend;
2982 return $current_suspend;
2990 * @package WordPress
2992 * @param int $blog_id optional blog id to test (default current blog)
2993 * @return bool True if not multisite or $blog_id is main site
2995 function is_main_site( $blog_id = '' ) {
2996 global $current_site, $current_blog;
2998 if ( !is_multisite() )
3002 $blog_id = $current_blog->blog_id;
3004 return $blog_id == $current_site->blog_id;
3008 * Whether global terms are enabled.
3012 * @package WordPress
3014 * @return bool True if multisite and global terms enabled
3016 function global_terms_enabled() {
3017 if ( ! is_multisite() )
3020 static $global_terms = null;
3021 if ( is_null( $global_terms ) ) {
3022 $filter = apply_filters( 'global_terms_enabled', null );
3023 if ( ! is_null( $filter ) )
3024 $global_terms = (bool) $filter;
3026 $global_terms = (bool) get_site_option( 'global_terms_enabled', false );
3028 return $global_terms;
3032 * gmt_offset modification for smart timezone handling.
3034 * Overrides the gmt_offset option if we have a timezone_string available.
3038 * @return float|bool
3040 function wp_timezone_override_offset() {
3041 if ( !$timezone_string = get_option( 'timezone_string' ) ) {
3045 $timezone_object = timezone_open( $timezone_string );
3046 $datetime_object = date_create();
3047 if ( false === $timezone_object || false === $datetime_object ) {
3050 return round( timezone_offset_get( $timezone_object, $datetime_object ) / 3600, 2 );
3054 * {@internal Missing Short Description}}
3058 * @param unknown_type $a
3059 * @param unknown_type $b
3062 function _wp_timezone_choice_usort_callback( $a, $b ) {
3063 // Don't use translated versions of Etc
3064 if ( 'Etc' === $a['continent'] && 'Etc' === $b['continent'] ) {
3065 // Make the order of these more like the old dropdown
3066 if ( 'GMT+' === substr( $a['city'], 0, 4 ) && 'GMT+' === substr( $b['city'], 0, 4 ) ) {
3067 return -1 * ( strnatcasecmp( $a['city'], $b['city'] ) );
3069 if ( 'UTC' === $a['city'] ) {
3070 if ( 'GMT+' === substr( $b['city'], 0, 4 ) ) {
3075 if ( 'UTC' === $b['city'] ) {
3076 if ( 'GMT+' === substr( $a['city'], 0, 4 ) ) {
3081 return strnatcasecmp( $a['city'], $b['city'] );
3083 if ( $a['t_continent'] == $b['t_continent'] ) {
3084 if ( $a['t_city'] == $b['t_city'] ) {
3085 return strnatcasecmp( $a['t_subcity'], $b['t_subcity'] );
3087 return strnatcasecmp( $a['t_city'], $b['t_city'] );
3089 // Force Etc to the bottom of the list
3090 if ( 'Etc' === $a['continent'] ) {
3093 if ( 'Etc' === $b['continent'] ) {
3096 return strnatcasecmp( $a['t_continent'], $b['t_continent'] );
3101 * Gives a nicely formatted list of timezone strings. // temporary! Not in final
3105 * @param string $selected_zone Selected Zone
3108 function wp_timezone_choice( $selected_zone ) {
3109 static $mo_loaded = false;
3111 $continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific');
3113 // Load translations for continents and cities
3114 if ( !$mo_loaded ) {
3115 $locale = get_locale();
3116 $mofile = WP_LANG_DIR . '/continents-cities-' . $locale . '.mo';
3117 load_textdomain( 'continents-cities', $mofile );
3122 foreach ( timezone_identifiers_list() as $zone ) {
3123 $zone = explode( '/', $zone );
3124 if ( !in_array( $zone[0], $continents ) ) {
3128 // This determines what gets set and translated - we don't translate Etc/* strings here, they are done later
3130 0 => ( isset( $zone[0] ) && $zone[0] ),
3131 1 => ( isset( $zone[1] ) && $zone[1] ),
3132 2 => ( isset( $zone[2] ) && $zone[2] ),
3134 $exists[3] = ( $exists[0] && 'Etc' !== $zone[0] );
3135 $exists[4] = ( $exists[1] && $exists[3] );
3136 $exists[5] = ( $exists[2] && $exists[3] );
3139 'continent' => ( $exists[0] ? $zone[0] : '' ),
3140 'city' => ( $exists[1] ? $zone[1] : '' ),
3141 'subcity' => ( $exists[2] ? $zone[2] : '' ),
3142 't_continent' => ( $exists[3] ? translate( str_replace( '_', ' ', $zone[0] ), 'continents-cities' ) : '' ),
3143 't_city' => ( $exists[4] ? translate( str_replace( '_', ' ', $zone[1] ), 'continents-cities' ) : '' ),
3144 't_subcity' => ( $exists[5] ? translate( str_replace( '_', ' ', $zone[2] ), 'continents-cities' ) : '' )
3147 usort( $zonen, '_wp_timezone_choice_usort_callback' );
3149 $structure = array();
3151 if ( empty( $selected_zone ) ) {
3152 $structure[] = '<option selected="selected" value="">' . __( 'Select a city' ) . '</option>';
3155 foreach ( $zonen as $key => $zone ) {
3156 // Build value in an array to join later
3157 $value = array( $zone['continent'] );
3159 if ( empty( $zone['city'] ) ) {
3160 // It's at the continent level (generally won't happen)
3161 $display = $zone['t_continent'];
3163 // It's inside a continent group
3165 // Continent optgroup
3166 if ( !isset( $zonen[$key - 1] ) || $zonen[$key - 1]['continent'] !== $zone['continent'] ) {
3167 $label = $zone['t_continent'];
3168 $structure[] = '<optgroup label="'. esc_attr( $label ) .'">';
3171 // Add the city to the value
3172 $value[] = $zone['city'];
3174 $display = $zone['t_city'];
3175 if ( !empty( $zone['subcity'] ) ) {
3176 // Add the subcity to the value
3177 $value[] = $zone['subcity'];
3178 $display .= ' - ' . $zone['t_subcity'];
3183 $value = join( '/', $value );
3185 if ( $value === $selected_zone ) {
3186 $selected = 'selected="selected" ';
3188 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $value ) . '">' . esc_html( $display ) . "</option>";
3190 // Close continent optgroup
3191 if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) {
3192 $structure[] = '</optgroup>';
3197 $structure[] = '<optgroup label="'. esc_attr__( 'UTC' ) .'">';
3199 if ( 'UTC' === $selected_zone )
3200 $selected = 'selected="selected" ';
3201 $structure[] = '<option ' . $selected . 'value="' . esc_attr( 'UTC' ) . '">' . __('UTC') . '</option>';
3202 $structure[] = '</optgroup>';
3204 // Do manual UTC offsets
3205 $structure[] = '<optgroup label="'. esc_attr__( 'Manual Offsets' ) .'">';
3206 $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,
3207 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);
3208 foreach ( $offset_range as $offset ) {
3210 $offset_name = '+' . $offset;
3212 $offset_name = (string) $offset;
3214 $offset_value = $offset_name;
3215 $offset_name = str_replace(array('.25','.5','.75'), array(':15',':30',':45'), $offset_name);
3216 $offset_name = 'UTC' . $offset_name;
3217 $offset_value = 'UTC' . $offset_value;
3219 if ( $offset_value === $selected_zone )
3220 $selected = 'selected="selected" ';
3221 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $offset_value ) . '">' . esc_html( $offset_name ) . "</option>";
3224 $structure[] = '</optgroup>';
3226 return join( "\n", $structure );
3230 * Strip close comment and close php tags from file headers used by WP.
3231 * See http://core.trac.wordpress.org/ticket/8497
3235 * @param string $str
3238 function _cleanup_header_comment($str) {
3239 return trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $str));
3243 * Permanently deletes posts, pages, attachments, and comments which have been in the trash for EMPTY_TRASH_DAYS.
3247 function wp_scheduled_delete() {
3250 $delete_timestamp = time() - (60*60*24*EMPTY_TRASH_DAYS);
3252 $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);
3254 foreach ( (array) $posts_to_delete as $post ) {
3255 $post_id = (int) $post['post_id'];
3259 $del_post = get_post($post_id);
3261 if ( !$del_post || 'trash' != $del_post->post_status ) {
3262 delete_post_meta($post_id, '_wp_trash_meta_status');
3263 delete_post_meta($post_id, '_wp_trash_meta_time');
3265 wp_delete_post($post_id);
3269 $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);
3271 foreach ( (array) $comments_to_delete as $comment ) {
3272 $comment_id = (int) $comment['comment_id'];
3276 $del_comment = get_comment($comment_id);
3278 if ( !$del_comment || 'trash' != $del_comment->comment_approved ) {
3279 delete_comment_meta($comment_id, '_wp_trash_meta_time');
3280 delete_comment_meta($comment_id, '_wp_trash_meta_status');
3282 wp_delete_comment($comment_id);
3288 * Retrieve metadata from a file.
3290 * Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
3291 * Each piece of metadata must be on its own line. Fields can not span multiple
3292 * lines, the value will get cut at the end of the first line.
3294 * If the file data is not within that first 8kiB, then the author should correct
3295 * their plugin file and move the data headers to the top.
3297 * @see http://codex.wordpress.org/File_Header
3300 * @param string $file Path to the file
3301 * @param array $default_headers List of headers, in the format array('HeaderKey' => 'Header Name')
3302 * @param string $context If specified adds filter hook "extra_{$context}_headers"
3304 function get_file_data( $file, $default_headers, $context = '' ) {
3305 // We don't need to write to the file, so just open for reading.
3306 $fp = fopen( $file, 'r' );
3308 // Pull only the first 8kiB of the file in.
3309 $file_data = fread( $fp, 8192 );
3311 // PHP will close file handle, but we are good citizens.
3314 // Make sure we catch CR-only line endings.
3315 $file_data = str_replace( "\r", "\n", $file_data );
3317 if ( $context && $extra_headers = apply_filters( "extra_{$context}_headers", array() ) ) {
3318 $extra_headers = array_combine( $extra_headers, $extra_headers ); // keys equal values
3319 $all_headers = array_merge( $extra_headers, (array) $default_headers );
3321 $all_headers = $default_headers;
3324 foreach ( $all_headers as $field => $regex ) {
3325 if ( preg_match( '/^[ \t\/*#@]*' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, $match ) && $match[1] )
3326 $all_headers[ $field ] = _cleanup_header_comment( $match[1] );
3328 $all_headers[ $field ] = '';
3331 return $all_headers;
3335 * Used internally to tidy up the search terms.
3343 function _search_terms_tidy($t) {
3344 return trim($t, "\"'\n\r ");
3350 * Useful for returning true to filters easily.
3353 * @see __return_false()
3356 function __return_true() {
3363 * Useful for returning false to filters easily.
3366 * @see __return_true()
3367 * @return bool false
3369 function __return_false() {
3376 * Useful for returning 0 to filters easily.
3379 * @see __return_zero()
3382 function __return_zero() {
3387 * Returns an empty array.
3389 * Useful for returning an empty array to filters easily.
3392 * @see __return_zero()
3393 * @return array Empty array
3395 function __return_empty_array() {
3402 * Useful for returning null to filters easily.
3407 function __return_null() {
3412 * Send a HTTP header to disable content type sniffing in browsers which support it.
3414 * @link http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
3415 * @link http://src.chromium.org/viewvc/chrome?view=rev&revision=6985
3420 function send_nosniff_header() {
3421 @header( 'X-Content-Type-Options: nosniff' );
3425 * Returns a MySQL expression for selecting the week number based on the start_of_week option.
3429 * @param string $column
3432 function _wp_mysql_week( $column ) {
3433 switch ( $start_of_week = (int) get_option( 'start_of_week' ) ) {
3436 return "WEEK( $column, 0 )";
3438 return "WEEK( $column, 1 )";
3444 return "WEEK( DATE_SUB( $column, INTERVAL $start_of_week DAY ), 0 )";
3449 * Finds hierarchy loops using a callback function that maps object IDs to parent IDs.
3454 * @param callback $callback function that accepts ( ID, $callback_args ) and outputs parent_ID
3455 * @param int $start The ID to start the loop check at
3456 * @param int $start_parent the parent_ID of $start to use instead of calling $callback( $start ). Use null to always use $callback
3457 * @param array $callback_args optional additional arguments to send to $callback
3458 * @return array IDs of all members of loop
3460 function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
3461 $override = is_null( $start_parent ) ? array() : array( $start => $start_parent );
3463 if ( !$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args ) )
3466 return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
3470 * Uses the "The Tortoise and the Hare" algorithm to detect loops.
3472 * For every step of the algorithm, the hare takes two steps and the tortoise one.
3473 * If the hare ever laps the tortoise, there must be a loop.
3478 * @param callback $callback function that accepts ( ID, callback_arg, ... ) and outputs parent_ID
3479 * @param int $start The ID to start the loop check at
3480 * @param array $override an array of ( ID => parent_ID, ... ) to use instead of $callback
3481 * @param array $callback_args optional additional arguments to send to $callback
3482 * @param bool $_return_loop Return loop members or just detect presence of loop?
3483 * Only set to true if you already know the given $start is part of a loop
3484 * (otherwise the returned array might include branches)
3485 * @return mixed scalar ID of some arbitrary member of the loop, or array of IDs of all members of loop if $_return_loop
3487 function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) {
3488 $tortoise = $hare = $evanescent_hare = $start;
3491 // Set evanescent_hare to one past hare
3492 // Increment hare two steps
3496 ( $evanescent_hare = isset( $override[$hare] ) ? $override[$hare] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) )
3498 ( $hare = isset( $override[$evanescent_hare] ) ? $override[$evanescent_hare] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) )
3500 if ( $_return_loop )
3501 $return[$tortoise] = $return[$evanescent_hare] = $return[$hare] = true;
3503 // tortoise got lapped - must be a loop
3504 if ( $tortoise == $evanescent_hare || $tortoise == $hare )
3505 return $_return_loop ? $return : $tortoise;
3507 // Increment tortoise by one step
3508 $tortoise = isset( $override[$tortoise] ) ? $override[$tortoise] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) );
3515 * Send a HTTP header to limit rendering of pages to same origin iframes.
3517 * @link https://developer.mozilla.org/en/the_x-frame-options_response_header
3522 function send_frame_options_header() {
3523 @header( 'X-Frame-Options: SAMEORIGIN' );
3527 * Retrieve a list of protocols to allow in HTML attributes.
3533 * @return array Array of allowed protocols
3535 function wp_allowed_protocols() {
3538 if ( empty( $protocols ) ) {
3539 $protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn' );
3540 $protocols = apply_filters( 'kses_allowed_protocols', $protocols );
3547 * Return a comma separated string of functions that have been called to get to the current point in code.
3549 * @link http://core.trac.wordpress.org/ticket/19589
3552 * @param string $ignore_class A class to ignore all function calls within - useful when you want to just give info about the callee
3553 * @param int $skip_frames A number of stack frames to skip - useful for unwinding back to the source of the issue
3554 * @param bool $pretty Whether or not you want a comma separated string or raw array returned
3555 * @return string|array Either a string containing a reversed comma separated trace or an array of individual calls.
3557 function wp_debug_backtrace_summary( $ignore_class = null, $skip_frames = 0, $pretty = true ) {
3558 if ( version_compare( PHP_VERSION, '5.2.5', '>=' ) )
3559 $trace = debug_backtrace( false );
3561 $trace = debug_backtrace();
3564 $check_class = ! is_null( $ignore_class );
3565 $skip_frames++; // skip this function
3567 foreach ( $trace as $call ) {
3568 if ( $skip_frames > 0 ) {
3570 } elseif ( isset( $call['class'] ) ) {
3571 if ( $check_class && $ignore_class == $call['class'] )
3572 continue; // Filter out calls
3574 $caller[] = "{$call['class']}{$call['type']}{$call['function']}";
3576 if ( in_array( $call['function'], array( 'do_action', 'apply_filters' ) ) ) {
3577 $caller[] = "{$call['function']}('{$call['args'][0]}')";
3578 } elseif ( in_array( $call['function'], array( 'include', 'include_once', 'require', 'require_once' ) ) ) {
3579 $caller[] = $call['function'] . "('" . str_replace( array( WP_CONTENT_DIR, ABSPATH ) , '', $call['args'][0] ) . "')";
3581 $caller[] = $call['function'];
3586 return join( ', ', array_reverse( $caller ) );
3592 * Retrieve ids that are not already present in the cache
3596 * @param array $object_ids ID list
3597 * @param string $cache_key The cache bucket to check against
3601 function _get_non_cached_ids( $object_ids, $cache_key ) {
3603 foreach ( $object_ids as $id ) {
3605 if ( !wp_cache_get( $id, $cache_key ) ) {
3614 * Test if the current device has the capability to upload files.
3619 * @return bool true|false
3621 function _device_can_upload() {
3622 if ( ! wp_is_mobile() )
3625 $ua = $_SERVER['HTTP_USER_AGENT'];
3627 if ( strpos($ua, 'iPhone') !== false
3628 || strpos($ua, 'iPad') !== false
3629 || strpos($ua, 'iPod') !== false ) {
3630 return preg_match( '#OS ([\d_]+) like Mac OS X#', $ua, $version ) && version_compare( $version[1], '6', '>=' );