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' ) * HOUR_IN_SECONDS ) ) );
65 return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
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 - DAY_IN_SECONDS * ( $weekday - $start_of_week ); // The most recent week start day on or before $day
218 $end = $start + 7 * DAY_IN_SECONDS - 1; // $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 ( wp_get_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;
499 $options['reject_unsafe_urls'] = true;
501 if ( false == $file_path )
502 $options['method'] = 'HEAD';
504 $options['method'] = 'GET';
506 $response = wp_remote_request($url, $options);
508 if ( is_wp_error( $response ) )
511 $headers = wp_remote_retrieve_headers( $response );
512 $headers['response'] = wp_remote_retrieve_response_code( $response );
514 // WP_HTTP no longer follows redirects for HEAD requests.
515 if ( 'HEAD' == $options['method'] && in_array($headers['response'], array(301, 302)) && isset( $headers['location'] ) ) {
516 return wp_get_http( $headers['location'], $file_path, ++$red );
519 if ( false == $file_path )
522 // GET request - write it to the supplied filename
523 $out_fp = fopen($file_path, 'w');
527 fwrite( $out_fp, wp_remote_retrieve_body( $response ) );
535 * Retrieve HTTP Headers from URL.
540 * @param bool $deprecated Not Used.
541 * @return bool|string False on failure, headers on success.
543 function wp_get_http_headers( $url, $deprecated = false ) {
544 if ( !empty( $deprecated ) )
545 _deprecated_argument( __FUNCTION__, '2.7' );
547 $response = wp_remote_head( $url, array( 'reject_unsafe_urls' => true ) );
549 if ( is_wp_error( $response ) )
552 return wp_remote_retrieve_headers( $response );
556 * Whether today is a new day.
560 * @uses $previousday Previous day
562 * @return int 1 when new day, 0 if not a new day.
564 function is_new_day() {
565 global $currentday, $previousday;
566 if ( $currentday != $previousday )
573 * Build URL query based on an associative and, or indexed array.
575 * This is a convenient function for easily building url queries. It sets the
576 * separator to '&' and uses _http_build_query() function.
578 * @see _http_build_query() Used to build the query
579 * @link http://us2.php.net/manual/en/function.http-build-query.php more on what
580 * http_build_query() does.
584 * @param array $data URL-encode key/value pairs.
585 * @return string URL encoded string
587 function build_query( $data ) {
588 return _http_build_query( $data, null, '&', '', false );
591 // from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
592 function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
595 foreach ( (array) $data as $k => $v ) {
598 if ( is_int($k) && $prefix != null )
601 $k = $key . '%5B' . $k . '%5D';
604 elseif ( $v === FALSE )
607 if ( is_array($v) || is_object($v) )
608 array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
609 elseif ( $urlencode )
610 array_push($ret, $k.'='.urlencode($v));
612 array_push($ret, $k.'='.$v);
616 $sep = ini_get('arg_separator.output');
618 return implode($sep, $ret);
622 * Retrieve a modified URL query string.
624 * You can rebuild the URL and append a new query variable to the URL query by
625 * using this function. You can also retrieve the full URL with query data.
627 * Adding a single key & value or an associative array. Setting a key value to
628 * an empty string removes the key. Omitting oldquery_or_uri uses the $_SERVER
629 * value. Additional values provided are expected to be encoded appropriately
630 * with urlencode() or rawurlencode().
634 * @param mixed $param1 Either newkey or an associative_array
635 * @param mixed $param2 Either newvalue or oldquery or uri
636 * @param mixed $param3 Optional. Old query or uri
637 * @return string New URL query string.
639 function add_query_arg() {
641 $args = func_get_args();
642 if ( is_array( $args[0] ) ) {
643 if ( count( $args ) < 2 || false === $args[1] )
644 $uri = $_SERVER['REQUEST_URI'];
648 if ( count( $args ) < 3 || false === $args[2] )
649 $uri = $_SERVER['REQUEST_URI'];
654 if ( $frag = strstr( $uri, '#' ) )
655 $uri = substr( $uri, 0, -strlen( $frag ) );
659 if ( 0 === stripos( $uri, 'http://' ) ) {
660 $protocol = 'http://';
661 $uri = substr( $uri, 7 );
662 } elseif ( 0 === stripos( $uri, 'https://' ) ) {
663 $protocol = 'https://';
664 $uri = substr( $uri, 8 );
669 if ( strpos( $uri, '?' ) !== false ) {
670 $parts = explode( '?', $uri, 2 );
671 if ( 1 == count( $parts ) ) {
675 $base = $parts[0] . '?';
678 } elseif ( $protocol || strpos( $uri, '=' ) === false ) {
686 wp_parse_str( $query, $qs );
687 $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
688 if ( is_array( $args[0] ) ) {
690 $qs = array_merge( $qs, $kayvees );
692 $qs[ $args[0] ] = $args[1];
695 foreach ( $qs as $k => $v ) {
700 $ret = build_query( $qs );
701 $ret = trim( $ret, '?' );
702 $ret = preg_replace( '#=(&|$)#', '$1', $ret );
703 $ret = $protocol . $base . $ret . $frag;
704 $ret = rtrim( $ret, '?' );
709 * Removes an item or list from the query string.
713 * @param string|array $key Query key or keys to remove.
714 * @param bool $query When false uses the $_SERVER value.
715 * @return string New URL query string.
717 function remove_query_arg( $key, $query=false ) {
718 if ( is_array( $key ) ) { // removing multiple keys
719 foreach ( $key as $k )
720 $query = add_query_arg( $k, false, $query );
723 return add_query_arg( $key, false, $query );
727 * Walks the array while sanitizing the contents.
731 * @param array $array Array to used to walk while sanitizing contents.
732 * @return array Sanitized $array.
734 function add_magic_quotes( $array ) {
735 foreach ( (array) $array as $k => $v ) {
736 if ( is_array( $v ) ) {
737 $array[$k] = add_magic_quotes( $v );
739 $array[$k] = addslashes( $v );
746 * HTTP request for URI to retrieve content.
749 * @uses wp_remote_get()
751 * @param string $uri URI/URL of web page to retrieve.
752 * @return bool|string HTTP content. False on failure.
754 function wp_remote_fopen( $uri ) {
755 $parsed_url = @parse_url( $uri );
757 if ( !$parsed_url || !is_array( $parsed_url ) )
761 $options['timeout'] = 10;
762 $options['reject_unsafe_urls'] = true;
764 $response = wp_remote_get( $uri, $options );
766 if ( is_wp_error( $response ) )
769 return wp_remote_retrieve_body( $response );
773 * Set up the WordPress query.
777 * @param string $query_vars Default WP_Query arguments.
779 function wp( $query_vars = '' ) {
780 global $wp, $wp_query, $wp_the_query;
781 $wp->main( $query_vars );
783 if ( !isset($wp_the_query) )
784 $wp_the_query = $wp_query;
788 * Retrieve the description for the HTTP status.
792 * @param int $code HTTP status code.
793 * @return string Empty string if not found, or description if found.
795 function get_status_header_desc( $code ) {
796 global $wp_header_to_desc;
798 $code = absint( $code );
800 if ( !isset( $wp_header_to_desc ) ) {
801 $wp_header_to_desc = array(
803 101 => 'Switching Protocols',
809 203 => 'Non-Authoritative Information',
811 205 => 'Reset Content',
812 206 => 'Partial Content',
813 207 => 'Multi-Status',
816 300 => 'Multiple Choices',
817 301 => 'Moved Permanently',
820 304 => 'Not Modified',
823 307 => 'Temporary Redirect',
825 400 => 'Bad Request',
826 401 => 'Unauthorized',
827 402 => 'Payment Required',
830 405 => 'Method Not Allowed',
831 406 => 'Not Acceptable',
832 407 => 'Proxy Authentication Required',
833 408 => 'Request Timeout',
836 411 => 'Length Required',
837 412 => 'Precondition Failed',
838 413 => 'Request Entity Too Large',
839 414 => 'Request-URI Too Long',
840 415 => 'Unsupported Media Type',
841 416 => 'Requested Range Not Satisfiable',
842 417 => 'Expectation Failed',
843 422 => 'Unprocessable Entity',
845 424 => 'Failed Dependency',
846 426 => 'Upgrade Required',
848 500 => 'Internal Server Error',
849 501 => 'Not Implemented',
850 502 => 'Bad Gateway',
851 503 => 'Service Unavailable',
852 504 => 'Gateway Timeout',
853 505 => 'HTTP Version Not Supported',
854 506 => 'Variant Also Negotiates',
855 507 => 'Insufficient Storage',
856 510 => 'Not Extended'
860 if ( isset( $wp_header_to_desc[$code] ) )
861 return $wp_header_to_desc[$code];
867 * Set HTTP status header.
870 * @uses apply_filters() Calls 'status_header' on status header string, HTTP
871 * HTTP code, HTTP code description, and protocol string as separate
874 * @param int $header HTTP status code
877 function status_header( $header ) {
878 $text = get_status_header_desc( $header );
880 if ( empty( $text ) )
883 $protocol = $_SERVER["SERVER_PROTOCOL"];
884 if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
885 $protocol = 'HTTP/1.0';
886 $status_header = "$protocol $header $text";
887 if ( function_exists( 'apply_filters' ) )
888 $status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol );
890 return @header( $status_header, true, $header );
894 * Gets the header information to prevent caching.
896 * The several different headers cover the different ways cache prevention is handled
897 * by different browsers
901 * @uses apply_filters()
902 * @return array The associative array of header names and field values.
904 function wp_get_nocache_headers() {
906 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
907 'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
908 'Pragma' => 'no-cache',
911 if ( function_exists('apply_filters') ) {
912 $headers = (array) apply_filters('nocache_headers', $headers);
914 $headers['Last-Modified'] = false;
919 * Sets the headers to prevent caching for the different browsers.
921 * Different browsers support different nocache headers, so several headers must
922 * be sent so that all of them get the point that no caching should occur.
925 * @uses wp_get_nocache_headers()
927 function nocache_headers() {
928 $headers = wp_get_nocache_headers();
930 unset( $headers['Last-Modified'] );
932 // In PHP 5.3+, make sure we are not sending a Last-Modified header.
933 if ( function_exists( 'header_remove' ) ) {
934 @header_remove( 'Last-Modified' );
936 // In PHP 5.2, send an empty Last-Modified header, but only as a
937 // last resort to override a header already sent. #WP23021
938 foreach ( headers_list() as $header ) {
939 if ( 0 === stripos( $header, 'Last-Modified' ) ) {
940 $headers['Last-Modified'] = '';
946 foreach( $headers as $name => $field_value )
947 @header("{$name}: {$field_value}");
951 * Set the headers for caching for 10 days with JavaScript content type.
955 function cache_javascript_headers() {
956 $expiresOffset = 10 * DAY_IN_SECONDS;
957 header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );
958 header( "Vary: Accept-Encoding" ); // Handle proxies
959 header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
963 * Retrieve the number of database queries during the WordPress execution.
967 * @return int Number of database queries
969 function get_num_queries() {
971 return $wpdb->num_queries;
975 * Whether input is yes or no. Must be 'y' to be true.
979 * @param string $yn Character string containing either 'y' or 'n'
980 * @return bool True if yes, false on anything else
982 function bool_from_yn( $yn ) {
983 return ( strtolower( $yn ) == 'y' );
987 * Loads the feed template from the use of an action hook.
989 * If the feed action does not have a hook, then the function will die with a
990 * message telling the visitor that the feed is not valid.
992 * It is better to only have one hook for each feed.
995 * @uses $wp_query Used to tell if the use a comment feed.
996 * @uses do_action() Calls 'do_feed_$feed' hook, if a hook exists for the feed.
1001 $feed = get_query_var( 'feed' );
1003 // Remove the pad, if present.
1004 $feed = preg_replace( '/^_+/', '', $feed );
1006 if ( $feed == '' || $feed == 'feed' )
1007 $feed = get_default_feed();
1009 $hook = 'do_feed_' . $feed;
1010 if ( !has_action($hook) ) {
1011 $message = sprintf( __( 'ERROR: %s is not a valid feed template.' ), esc_html($feed));
1012 wp_die( $message, '', array( 'response' => 404 ) );
1015 do_action( $hook, $wp_query->is_comment_feed );
1019 * Load the RDF RSS 0.91 Feed template.
1023 function do_feed_rdf() {
1024 load_template( ABSPATH . WPINC . '/feed-rdf.php' );
1028 * Load the RSS 1.0 Feed Template.
1032 function do_feed_rss() {
1033 load_template( ABSPATH . WPINC . '/feed-rss.php' );
1037 * Load either the RSS2 comment feed or the RSS2 posts feed.
1041 * @param bool $for_comments True for the comment feed, false for normal feed.
1043 function do_feed_rss2( $for_comments ) {
1044 if ( $for_comments )
1045 load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );
1047 load_template( ABSPATH . WPINC . '/feed-rss2.php' );
1051 * Load either Atom comment feed or Atom posts feed.
1055 * @param bool $for_comments True for the comment feed, false for normal feed.
1057 function do_feed_atom( $for_comments ) {
1059 load_template( ABSPATH . WPINC . '/feed-atom-comments.php');
1061 load_template( ABSPATH . WPINC . '/feed-atom.php' );
1065 * Display the robots.txt file content.
1067 * The echo content should be with usage of the permalinks or for creating the
1071 * @uses do_action() Calls 'do_robotstxt' hook for displaying robots.txt rules.
1073 function do_robots() {
1074 header( 'Content-Type: text/plain; charset=utf-8' );
1076 do_action( 'do_robotstxt' );
1078 $output = "User-agent: *\n";
1079 $public = get_option( 'blog_public' );
1080 if ( '0' == $public ) {
1081 $output .= "Disallow: /\n";
1083 $site_url = parse_url( site_url() );
1084 $path = ( !empty( $site_url['path'] ) ) ? $site_url['path'] : '';
1085 $output .= "Disallow: $path/wp-admin/\n";
1086 $output .= "Disallow: $path/wp-includes/\n";
1089 echo apply_filters('robots_txt', $output, $public);
1093 * Test whether blog is already installed.
1095 * The cache will be checked first. If you have a cache plugin, which saves the
1096 * cache values, then this will work. If you use the default WordPress cache,
1097 * and the database goes away, then you might have problems.
1099 * Checks for the option siteurl for whether WordPress is installed.
1104 * @return bool Whether blog is already installed.
1106 function is_blog_installed() {
1109 // Check cache first. If options table goes away and we have true cached, oh well.
1110 if ( wp_cache_get( 'is_blog_installed' ) )
1113 $suppress = $wpdb->suppress_errors();
1114 if ( ! defined( 'WP_INSTALLING' ) ) {
1115 $alloptions = wp_load_alloptions();
1117 // If siteurl is not set to autoload, check it specifically
1118 if ( !isset( $alloptions['siteurl'] ) )
1119 $installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
1121 $installed = $alloptions['siteurl'];
1122 $wpdb->suppress_errors( $suppress );
1124 $installed = !empty( $installed );
1125 wp_cache_set( 'is_blog_installed', $installed );
1130 // If visiting repair.php, return true and let it take over.
1131 if ( defined( 'WP_REPAIRING' ) )
1134 $suppress = $wpdb->suppress_errors();
1136 // Loop over the WP tables. If none exist, then scratch install is allowed.
1137 // If one or more exist, suggest table repair since we got here because the options
1138 // table could not be accessed.
1139 $wp_tables = $wpdb->tables();
1140 foreach ( $wp_tables as $table ) {
1141 // The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
1142 if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
1144 if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
1147 if ( ! $wpdb->get_results( "DESCRIBE $table;" ) )
1150 // One or more tables exist. We are insane.
1152 wp_load_translations_early();
1154 // Die with a DB error.
1155 $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' );
1159 $wpdb->suppress_errors( $suppress );
1161 wp_cache_set( 'is_blog_installed', false );
1167 * Retrieve URL with nonce added to URL query.
1169 * @package WordPress
1170 * @subpackage Security
1173 * @param string $actionurl URL to add nonce action
1174 * @param string $action Optional. Nonce action name
1175 * @return string URL with nonce action added.
1177 function wp_nonce_url( $actionurl, $action = -1 ) {
1178 $actionurl = str_replace( '&', '&', $actionurl );
1179 return esc_html( add_query_arg( '_wpnonce', wp_create_nonce( $action ), $actionurl ) );
1183 * Retrieve or display nonce hidden field for forms.
1185 * The nonce field is used to validate that the contents of the form came from
1186 * the location on the current site and not somewhere else. The nonce does not
1187 * offer absolute protection, but should protect against most cases. It is very
1188 * important to use nonce field in forms.
1190 * The $action and $name are optional, but if you want to have better security,
1191 * it is strongly suggested to set those two parameters. It is easier to just
1192 * call the function without any parameters, because validation of the nonce
1193 * doesn't require any parameters, but since crackers know what the default is
1194 * it won't be difficult for them to find a way around your nonce and cause
1197 * The input name will be whatever $name value you gave. The input value will be
1198 * the nonce creation value.
1200 * @package WordPress
1201 * @subpackage Security
1204 * @param string $action Optional. Action name.
1205 * @param string $name Optional. Nonce name.
1206 * @param bool $referer Optional, default true. Whether to set the referer field for validation.
1207 * @param bool $echo Optional, default true. Whether to display or return hidden form field.
1208 * @return string Nonce field.
1210 function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
1211 $name = esc_attr( $name );
1212 $nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
1215 $nonce_field .= wp_referer_field( false );
1220 return $nonce_field;
1224 * Retrieve or display referer hidden field for forms.
1226 * The referer link is the current Request URI from the server super global. The
1227 * input name is '_wp_http_referer', in case you wanted to check manually.
1229 * @package WordPress
1230 * @subpackage Security
1233 * @param bool $echo Whether to echo or return the referer field.
1234 * @return string Referer field.
1236 function wp_referer_field( $echo = true ) {
1237 $ref = esc_attr( $_SERVER['REQUEST_URI'] );
1238 $referer_field = '<input type="hidden" name="_wp_http_referer" value="'. $ref . '" />';
1241 echo $referer_field;
1242 return $referer_field;
1246 * Retrieve or display original referer hidden field for forms.
1248 * The input name is '_wp_original_http_referer' and will be either the same
1249 * value of {@link wp_referer_field()}, if that was posted already or it will
1250 * be the current page, if it doesn't exist.
1252 * @package WordPress
1253 * @subpackage Security
1256 * @param bool $echo Whether to echo the original http referer
1257 * @param string $jump_back_to Optional, default is 'current'. Can be 'previous' or page you want to jump back to.
1258 * @return string Original referer field.
1260 function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {
1261 $jump_back_to = ( 'previous' == $jump_back_to ) ? wp_get_referer() : $_SERVER['REQUEST_URI'];
1262 $ref = ( wp_get_original_referer() ) ? wp_get_original_referer() : $jump_back_to;
1263 $orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( stripslashes( $ref ) ) . '" />';
1265 echo $orig_referer_field;
1266 return $orig_referer_field;
1270 * Retrieve referer from '_wp_http_referer' or HTTP referer. If it's the same
1271 * as the current request URL, will return false.
1273 * @package WordPress
1274 * @subpackage Security
1277 * @return string|bool False on failure. Referer URL on success.
1279 function wp_get_referer() {
1281 if ( ! empty( $_REQUEST['_wp_http_referer'] ) )
1282 $ref = $_REQUEST['_wp_http_referer'];
1283 else if ( ! empty( $_SERVER['HTTP_REFERER'] ) )
1284 $ref = $_SERVER['HTTP_REFERER'];
1286 if ( $ref && $ref !== $_SERVER['REQUEST_URI'] )
1292 * Retrieve original referer that was posted, if it exists.
1294 * @package WordPress
1295 * @subpackage Security
1298 * @return string|bool False if no original referer or original referer if set.
1300 function wp_get_original_referer() {
1301 if ( !empty( $_REQUEST['_wp_original_http_referer'] ) )
1302 return $_REQUEST['_wp_original_http_referer'];
1307 * Recursive directory creation based on full path.
1309 * Will attempt to set permissions on folders.
1313 * @param string $target Full path to attempt to create.
1314 * @return bool Whether the path was created. True if path already exists.
1316 function wp_mkdir_p( $target ) {
1319 // strip the protocol
1320 if( wp_is_stream( $target ) ) {
1321 list( $wrapper, $target ) = explode( '://', $target, 2 );
1324 // from php.net/mkdir user contributed notes
1325 $target = str_replace( '//', '/', $target );
1327 // put the wrapper back on the target
1328 if( $wrapper !== null ) {
1329 $target = $wrapper . '://' . $target;
1332 // safe mode fails with a trailing slash under certain PHP versions.
1333 $target = rtrim($target, '/'); // Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
1334 if ( empty($target) )
1337 if ( file_exists( $target ) )
1338 return @is_dir( $target );
1340 // Attempting to create the directory may clutter up our display.
1341 if ( @mkdir( $target ) ) {
1342 $stat = @stat( dirname( $target ) );
1343 $dir_perms = $stat['mode'] & 0007777; // Get the permission bits.
1344 @chmod( $target, $dir_perms );
1346 } elseif ( is_dir( dirname( $target ) ) ) {
1350 // If the above failed, attempt to create the parent node, then try again.
1351 if ( ( $target != '/' ) && ( wp_mkdir_p( dirname( $target ) ) ) )
1352 return wp_mkdir_p( $target );
1358 * Test if a give filesystem path is absolute ('/foo/bar', 'c:\windows').
1362 * @param string $path File path
1363 * @return bool True if path is absolute, false is not absolute.
1365 function path_is_absolute( $path ) {
1366 // this is definitive if true but fails if $path does not exist or contains a symbolic link
1367 if ( realpath($path) == $path )
1370 if ( strlen($path) == 0 || $path[0] == '.' )
1373 // windows allows absolute paths like this
1374 if ( preg_match('#^[a-zA-Z]:\\\\#', $path) )
1377 // a path starting with / or \ is absolute; anything else is relative
1378 return ( $path[0] == '/' || $path[0] == '\\' );
1382 * Join two filesystem paths together (e.g. 'give me $path relative to $base').
1384 * If the $path is absolute, then it the full path is returned.
1388 * @param string $base
1389 * @param string $path
1390 * @return string The path with the base or absolute path.
1392 function path_join( $base, $path ) {
1393 if ( path_is_absolute($path) )
1396 return rtrim($base, '/') . '/' . ltrim($path, '/');
1400 * Determines a writable directory for temporary files.
1401 * Function's preference is the return value of <code>sys_get_temp_dir()</code>,
1402 * followed by your PHP temporary upload directory, followed by WP_CONTENT_DIR,
1403 * before finally defaulting to /tmp/
1405 * In the event that this function does not find a writable location,
1406 * It may be overridden by the <code>WP_TEMP_DIR</code> constant in
1407 * your <code>wp-config.php</code> file.
1411 * @return string Writable temporary directory
1413 function get_temp_dir() {
1415 if ( defined('WP_TEMP_DIR') )
1416 return trailingslashit(WP_TEMP_DIR);
1419 return trailingslashit( rtrim( $temp, '\\' ) );
1421 $is_win = ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) );
1423 if ( function_exists('sys_get_temp_dir') ) {
1424 $temp = sys_get_temp_dir();
1425 if ( @is_dir( $temp ) && ( $is_win ? win_is_writable( $temp ) : @is_writable( $temp ) ) ) {
1426 return trailingslashit( rtrim( $temp, '\\' ) );
1430 $temp = ini_get('upload_tmp_dir');
1431 if ( is_dir( $temp ) && ( $is_win ? win_is_writable( $temp ) : @is_writable( $temp ) ) )
1432 return trailingslashit( rtrim( $temp, '\\' ) );
1434 $temp = WP_CONTENT_DIR . '/';
1435 if ( is_dir( $temp ) && ( $is_win ? win_is_writable( $temp ) : @is_writable( $temp ) ) )
1443 * Workaround for Windows bug in is_writable() function
1447 * @param string $path
1450 function win_is_writable( $path ) {
1451 /* will work in despite of Windows ACLs bug
1452 * NOTE: use a trailing slash for folders!!!
1453 * see http://bugs.php.net/bug.php?id=27609
1454 * see http://bugs.php.net/bug.php?id=30931
1457 if ( $path[strlen( $path ) - 1] == '/' ) // recursively return a temporary file path
1458 return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp');
1459 else if ( is_dir( $path ) )
1460 return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );
1461 // check tmp file for read/write capabilities
1462 $should_delete_tmp_file = !file_exists( $path );
1463 $f = @fopen( $path, 'a' );
1467 if ( $should_delete_tmp_file )
1473 * Get an array containing the current upload directory's path and url.
1475 * Checks the 'upload_path' option, which should be from the web root folder,
1476 * and if it isn't empty it will be used. If it is empty, then the path will be
1477 * 'WP_CONTENT_DIR/uploads'. If the 'UPLOADS' constant is defined, then it will
1478 * override the 'upload_path' option and 'WP_CONTENT_DIR/uploads' path.
1480 * The upload URL path is set either by the 'upload_url_path' option or by using
1481 * the 'WP_CONTENT_URL' constant and appending '/uploads' to the path.
1483 * If the 'uploads_use_yearmonth_folders' is set to true (checkbox if checked in
1484 * the administration settings panel), then the time will be used. The format
1485 * will be year first and then month.
1487 * If the path couldn't be created, then an error will be returned with the key
1488 * 'error' containing the error message. The error suggests that the parent
1489 * directory is not writable by the server.
1491 * On success, the returned array will have many indices:
1492 * 'path' - base directory and sub directory or full path to upload directory.
1493 * 'url' - base url and sub directory or absolute URL to upload directory.
1494 * 'subdir' - sub directory if uploads use year/month folders option is on.
1495 * 'basedir' - path without subdir.
1496 * 'baseurl' - URL path without subdir.
1497 * 'error' - set to false.
1500 * @uses apply_filters() Calls 'upload_dir' on returned array.
1502 * @param string $time Optional. Time formatted in 'yyyy/mm'.
1503 * @return array See above for description.
1505 function wp_upload_dir( $time = null ) {
1506 $siteurl = get_option( 'siteurl' );
1507 $upload_path = trim( get_option( 'upload_path' ) );
1509 if ( empty( $upload_path ) || 'wp-content/uploads' == $upload_path ) {
1510 $dir = WP_CONTENT_DIR . '/uploads';
1511 } elseif ( 0 !== strpos( $upload_path, ABSPATH ) ) {
1512 // $dir is absolute, $upload_path is (maybe) relative to ABSPATH
1513 $dir = path_join( ABSPATH, $upload_path );
1515 $dir = $upload_path;
1518 if ( !$url = get_option( 'upload_url_path' ) ) {
1519 if ( empty($upload_path) || ( 'wp-content/uploads' == $upload_path ) || ( $upload_path == $dir ) )
1520 $url = WP_CONTENT_URL . '/uploads';
1522 $url = trailingslashit( $siteurl ) . $upload_path;
1525 // Obey the value of UPLOADS. This happens as long as ms-files rewriting is disabled.
1526 // We also sometimes obey UPLOADS when rewriting is enabled -- see the next block.
1527 if ( defined( 'UPLOADS' ) && ! ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) ) {
1528 $dir = ABSPATH . UPLOADS;
1529 $url = trailingslashit( $siteurl ) . UPLOADS;
1532 // If multisite (and if not the main site in a post-MU network)
1533 if ( is_multisite() && ! ( is_main_site() && defined( 'MULTISITE' ) ) ) {
1535 if ( ! get_site_option( 'ms_files_rewriting' ) ) {
1536 // If ms-files rewriting is disabled (networks created post-3.5), it is fairly straightforward:
1537 // Append sites/%d if we're not on the main site (for post-MU networks). (The extra directory
1538 // prevents a four-digit ID from conflicting with a year-based directory for the main site.
1539 // But if a MU-era network has disabled ms-files rewriting manually, they don't need the extra
1540 // directory, as they never had wp-content/uploads for the main site.)
1542 if ( defined( 'MULTISITE' ) )
1543 $ms_dir = '/sites/' . get_current_blog_id();
1545 $ms_dir = '/' . get_current_blog_id();
1550 } elseif ( defined( 'UPLOADS' ) && ! ms_is_switched() ) {
1551 // Handle the old-form ms-files.php rewriting if the network still has that enabled.
1552 // When ms-files rewriting is enabled, then we only listen to UPLOADS when:
1553 // 1) we are not on the main site in a post-MU network,
1554 // as wp-content/uploads is used there, and
1555 // 2) we are not switched, as ms_upload_constants() hardcodes
1556 // these constants to reflect the original blog ID.
1558 // Rather than UPLOADS, we actually use BLOGUPLOADDIR if it is set, as it is absolute.
1559 // (And it will be set, see ms_upload_constants().) Otherwise, UPLOADS can be used, as
1560 // as it is relative to ABSPATH. For the final piece: when UPLOADS is used with ms-files
1561 // rewriting in multisite, the resulting URL is /files. (#WP22702 for background.)
1563 if ( defined( 'BLOGUPLOADDIR' ) )
1564 $dir = untrailingslashit( BLOGUPLOADDIR );
1566 $dir = ABSPATH . UPLOADS;
1567 $url = trailingslashit( $siteurl ) . 'files';
1575 if ( get_option( 'uploads_use_yearmonth_folders' ) ) {
1576 // Generate the yearly and monthly dirs
1578 $time = current_time( 'mysql' );
1579 $y = substr( $time, 0, 4 );
1580 $m = substr( $time, 5, 2 );
1587 $uploads = apply_filters( 'upload_dir',
1591 'subdir' => $subdir,
1592 'basedir' => $basedir,
1593 'baseurl' => $baseurl,
1597 // Make sure we have an uploads dir
1598 if ( ! wp_mkdir_p( $uploads['path'] ) ) {
1599 if ( 0 === strpos( $uploads['basedir'], ABSPATH ) )
1600 $error_path = str_replace( ABSPATH, '', $uploads['basedir'] ) . $uploads['subdir'];
1602 $error_path = basename( $uploads['basedir'] ) . $uploads['subdir'];
1604 $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
1605 $uploads['error'] = $message;
1612 * Get a filename that is sanitized and unique for the given directory.
1614 * If the filename is not unique, then a number will be added to the filename
1615 * before the extension, and will continue adding numbers until the filename is
1618 * The callback is passed three parameters, the first one is the directory, the
1619 * second is the filename, and the third is the extension.
1623 * @param string $dir
1624 * @param string $filename
1625 * @param mixed $unique_filename_callback Callback.
1626 * @return string New filename, if given wasn't unique.
1628 function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
1629 // sanitize the file name before we begin processing
1630 $filename = sanitize_file_name($filename);
1632 // separate the filename into a name and extension
1633 $info = pathinfo($filename);
1634 $ext = !empty($info['extension']) ? '.' . $info['extension'] : '';
1635 $name = basename($filename, $ext);
1637 // edge case: if file is named '.ext', treat as an empty name
1638 if ( $name === $ext )
1641 // Increment the file number until we have a unique file to save in $dir. Use callback if supplied.
1642 if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
1643 $filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
1647 // change '.ext' to lower case
1648 if ( $ext && strtolower($ext) != $ext ) {
1649 $ext2 = strtolower($ext);
1650 $filename2 = preg_replace( '|' . preg_quote($ext) . '$|', $ext2, $filename );
1652 // check for both lower and upper case extension or image sub-sizes may be overwritten
1653 while ( file_exists($dir . "/$filename") || file_exists($dir . "/$filename2") ) {
1654 $new_number = $number + 1;
1655 $filename = str_replace( "$number$ext", "$new_number$ext", $filename );
1656 $filename2 = str_replace( "$number$ext2", "$new_number$ext2", $filename2 );
1657 $number = $new_number;
1662 while ( file_exists( $dir . "/$filename" ) ) {
1663 if ( '' == "$number$ext" )
1664 $filename = $filename . ++$number . $ext;
1666 $filename = str_replace( "$number$ext", ++$number . $ext, $filename );
1674 * Create a file in the upload folder with given content.
1676 * If there is an error, then the key 'error' will exist with the error message.
1677 * If success, then the key 'file' will have the unique file path, the 'url' key
1678 * will have the link to the new file. and the 'error' key will be set to false.
1680 * This function will not move an uploaded file to the upload folder. It will
1681 * create a new file with the content in $bits parameter. If you move the upload
1682 * file, read the content of the uploaded file, and then you can give the
1683 * filename and content to this function, which will add it to the upload
1686 * The permissions will be set on the new file automatically by this function.
1690 * @param string $name
1691 * @param null $deprecated Never used. Set to null.
1692 * @param mixed $bits File content
1693 * @param string $time Optional. Time formatted in 'yyyy/mm'.
1696 function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
1697 if ( !empty( $deprecated ) )
1698 _deprecated_argument( __FUNCTION__, '2.0' );
1700 if ( empty( $name ) )
1701 return array( 'error' => __( 'Empty filename' ) );
1703 $wp_filetype = wp_check_filetype( $name );
1704 if ( ! $wp_filetype['ext'] && ! current_user_can( 'unfiltered_upload' ) )
1705 return array( 'error' => __( 'Invalid file type' ) );
1707 $upload = wp_upload_dir( $time );
1709 if ( $upload['error'] !== false )
1712 $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) );
1713 if ( !is_array( $upload_bits_error ) ) {
1714 $upload[ 'error' ] = $upload_bits_error;
1718 $filename = wp_unique_filename( $upload['path'], $name );
1720 $new_file = $upload['path'] . "/$filename";
1721 if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
1722 if ( 0 === strpos( $upload['basedir'], ABSPATH ) )
1723 $error_path = str_replace( ABSPATH, '', $upload['basedir'] ) . $upload['subdir'];
1725 $error_path = basename( $upload['basedir'] ) . $upload['subdir'];
1727 $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
1728 return array( 'error' => $message );
1731 $ifp = @ fopen( $new_file, 'wb' );
1733 return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) );
1735 @fwrite( $ifp, $bits );
1739 // Set correct file permissions
1740 $stat = @ stat( dirname( $new_file ) );
1741 $perms = $stat['mode'] & 0007777;
1742 $perms = $perms & 0000666;
1743 @ chmod( $new_file, $perms );
1747 $url = $upload['url'] . "/$filename";
1749 return array( 'file' => $new_file, 'url' => $url, 'error' => false );
1753 * Retrieve the file type based on the extension name.
1755 * @package WordPress
1757 * @uses apply_filters() Calls 'ext2type' hook on default supported types.
1759 * @param string $ext The extension to search.
1760 * @return string|null The file type, example: audio, video, document, spreadsheet, etc. Null if not found.
1762 function wp_ext2type( $ext ) {
1763 $ext2type = apply_filters( 'ext2type', array(
1764 'audio' => array( 'aac', 'ac3', 'aif', 'aiff', 'm3a', 'm4a', 'm4b', 'mka', 'mp1', 'mp2', 'mp3', 'ogg', 'oga', 'ram', 'wav', 'wma' ),
1765 'video' => array( 'asf', 'avi', 'divx', 'dv', 'flv', 'm4v', 'mkv', 'mov', 'mp4', 'mpeg', 'mpg', 'mpv', 'ogm', 'ogv', 'qt', 'rm', 'vob', 'wmv' ),
1766 'document' => array( 'doc', 'docx', 'docm', 'dotm', 'odt', 'pages', 'pdf', 'rtf', 'wp', 'wpd' ),
1767 'spreadsheet' => array( 'numbers', 'ods', 'xls', 'xlsx', 'xlsm', 'xlsb' ),
1768 'interactive' => array( 'swf', 'key', 'ppt', 'pptx', 'pptm', 'pps', 'ppsx', 'ppsm', 'sldx', 'sldm', 'odp' ),
1769 'text' => array( 'asc', 'csv', 'tsv', 'txt' ),
1770 'archive' => array( 'bz2', 'cab', 'dmg', 'gz', 'rar', 'sea', 'sit', 'sqx', 'tar', 'tgz', 'zip', '7z' ),
1771 'code' => array( 'css', 'htm', 'html', 'php', 'js' ),
1773 foreach ( $ext2type as $type => $exts )
1774 if ( in_array( $ext, $exts ) )
1779 * Retrieve the file type from the file name.
1781 * You can optionally define the mime array, if needed.
1785 * @param string $filename File name or path.
1786 * @param array $mimes Optional. Key is the file extension with value as the mime type.
1787 * @return array Values with extension first and mime type.
1789 function wp_check_filetype( $filename, $mimes = null ) {
1790 if ( empty($mimes) )
1791 $mimes = get_allowed_mime_types();
1795 foreach ( $mimes as $ext_preg => $mime_match ) {
1796 $ext_preg = '!\.(' . $ext_preg . ')$!i';
1797 if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
1798 $type = $mime_match;
1799 $ext = $ext_matches[1];
1804 return compact( 'ext', 'type' );
1808 * Attempt to determine the real file type of a file.
1809 * If unable to, the file name extension will be used to determine type.
1811 * If it's determined that the extension does not match the file's real type,
1812 * then the "proper_filename" value will be set with a proper filename and extension.
1814 * Currently this function only supports validating images known to getimagesize().
1818 * @param string $file Full path to the image.
1819 * @param string $filename The filename of the image (may differ from $file due to $file being in a tmp directory)
1820 * @param array $mimes Optional. Key is the file extension with value as the mime type.
1821 * @return array Values for the extension, MIME, and either a corrected filename or false if original $filename is valid
1823 function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
1825 $proper_filename = false;
1827 // Do basic extension validation and MIME mapping
1828 $wp_filetype = wp_check_filetype( $filename, $mimes );
1829 extract( $wp_filetype );
1831 // We can't do any further validation without a file to work with
1832 if ( ! file_exists( $file ) )
1833 return compact( 'ext', 'type', 'proper_filename' );
1835 // We're able to validate images using GD
1836 if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
1838 // Attempt to figure out what type of image it actually is
1839 $imgstats = @getimagesize( $file );
1841 // If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
1842 if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
1843 // This is a simplified array of MIMEs that getimagesize() can detect and their extensions
1844 // You shouldn't need to use this filter, but it's here just in case
1845 $mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(
1846 'image/jpeg' => 'jpg',
1847 'image/png' => 'png',
1848 'image/gif' => 'gif',
1849 'image/bmp' => 'bmp',
1850 'image/tiff' => 'tif',
1853 // Replace whatever is after the last period in the filename with the correct extension
1854 if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
1855 $filename_parts = explode( '.', $filename );
1856 array_pop( $filename_parts );
1857 $filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
1858 $new_filename = implode( '.', $filename_parts );
1860 if ( $new_filename != $filename )
1861 $proper_filename = $new_filename; // Mark that it changed
1863 // Redefine the extension / MIME
1864 $wp_filetype = wp_check_filetype( $new_filename, $mimes );
1865 extract( $wp_filetype );
1870 // Let plugins try and validate other types of files
1871 // Should return an array in the style of array( 'ext' => $ext, 'type' => $type, 'proper_filename' => $proper_filename )
1872 return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
1876 * Retrieve list of mime types and file extensions.
1880 * @uses apply_filters() Calls 'mime_types' on returned array. This filter should
1881 * be used to add types, not remove them. To remove types use the upload_mimes filter.
1883 * @return array Array of mime types keyed by the file extension regex corresponding to those types.
1885 function wp_get_mime_types() {
1886 // Accepted MIME types are set here as PCRE unless provided.
1887 return apply_filters( 'mime_types', array(
1889 'jpg|jpeg|jpe' => 'image/jpeg',
1890 'gif' => 'image/gif',
1891 'png' => 'image/png',
1892 'bmp' => 'image/bmp',
1893 'tif|tiff' => 'image/tiff',
1894 'ico' => 'image/x-icon',
1896 'asf|asx|wax|wmv|wmx' => 'video/asf',
1897 'avi' => 'video/avi',
1898 'divx' => 'video/divx',
1899 'flv' => 'video/x-flv',
1900 'mov|qt' => 'video/quicktime',
1901 'mpeg|mpg|mpe' => 'video/mpeg',
1902 'mp4|m4v' => 'video/mp4',
1903 'ogv' => 'video/ogg',
1904 'mkv' => 'video/x-matroska',
1906 'txt|asc|c|cc|h' => 'text/plain',
1907 'csv' => 'text/csv',
1908 'tsv' => 'text/tab-separated-values',
1909 'ics' => 'text/calendar',
1910 'rtx' => 'text/richtext',
1911 'css' => 'text/css',
1912 'htm|html' => 'text/html',
1914 'mp3|m4a|m4b' => 'audio/mpeg',
1915 'ra|ram' => 'audio/x-realaudio',
1916 'wav' => 'audio/wav',
1917 'ogg|oga' => 'audio/ogg',
1918 'mid|midi' => 'audio/midi',
1919 'wma' => 'audio/wma',
1920 'mka' => 'audio/x-matroska',
1921 // Misc application formats
1922 'rtf' => 'application/rtf',
1923 'js' => 'application/javascript',
1924 'pdf' => 'application/pdf',
1925 'swf' => 'application/x-shockwave-flash',
1926 'class' => 'application/java',
1927 'tar' => 'application/x-tar',
1928 'zip' => 'application/zip',
1929 'gz|gzip' => 'application/x-gzip',
1930 'rar' => 'application/rar',
1931 '7z' => 'application/x-7z-compressed',
1932 'exe' => 'application/x-msdownload',
1933 // MS Office formats
1934 'doc' => 'application/msword',
1935 'pot|pps|ppt' => 'application/vnd.ms-powerpoint',
1936 'wri' => 'application/vnd.ms-write',
1937 'xla|xls|xlt|xlw' => 'application/vnd.ms-excel',
1938 'mdb' => 'application/vnd.ms-access',
1939 'mpp' => 'application/vnd.ms-project',
1940 'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
1941 'docm' => 'application/vnd.ms-word.document.macroEnabled.12',
1942 'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
1943 'dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
1944 'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
1945 'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
1946 'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
1947 'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
1948 'xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
1949 'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
1950 'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
1951 'pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
1952 'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
1953 'ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
1954 'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
1955 'potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
1956 'ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
1957 'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
1958 'sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
1959 'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
1960 // OpenOffice formats
1961 'odt' => 'application/vnd.oasis.opendocument.text',
1962 'odp' => 'application/vnd.oasis.opendocument.presentation',
1963 'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
1964 'odg' => 'application/vnd.oasis.opendocument.graphics',
1965 'odc' => 'application/vnd.oasis.opendocument.chart',
1966 'odb' => 'application/vnd.oasis.opendocument.database',
1967 'odf' => 'application/vnd.oasis.opendocument.formula',
1968 // WordPerfect formats
1969 'wp|wpd' => 'application/wordperfect',
1973 * Retrieve list of allowed mime types and file extensions.
1977 * @uses apply_filters() Calls 'upload_mimes' on returned array
1978 * @uses wp_get_upload_mime_types() to fetch the list of mime types
1980 * @return array Array of mime types keyed by the file extension regex corresponding to those types.
1982 function get_allowed_mime_types() {
1983 return apply_filters( 'upload_mimes', wp_get_mime_types() );
1987 * Display "Are You Sure" message to confirm the action being taken.
1989 * If the action has the nonce explain message, then it will be displayed along
1990 * with the "Are you sure?" message.
1992 * @package WordPress
1993 * @subpackage Security
1996 * @param string $action The nonce action.
1998 function wp_nonce_ays( $action ) {
1999 $title = __( 'WordPress Failure Notice' );
2000 if ( 'log-out' == $action ) {
2001 $html = sprintf( __( 'You are attempting to log out of %s' ), get_bloginfo( 'name' ) ) . '</p><p>';
2002 $html .= sprintf( __( "Do you really want to <a href='%s'>log out</a>?"), wp_logout_url() );
2004 $html = __( 'Are you sure you want to do this?' );
2005 if ( wp_get_referer() )
2006 $html .= "</p><p><a href='" . esc_url( remove_query_arg( 'updated', wp_get_referer() ) ) . "'>" . __( 'Please try again.' ) . "</a>";
2009 wp_die( $html, $title, array('response' => 403) );
2013 * Kill WordPress execution and display HTML message with error message.
2015 * This function complements the die() PHP function. The difference is that
2016 * HTML will be displayed to the user. It is recommended to use this function
2017 * only, when the execution should not continue any further. It is not
2018 * recommended to call this function very often and try to handle as many errors
2019 * as possible silently.
2023 * @param string $message Error message.
2024 * @param string $title Error title.
2025 * @param string|array $args Optional arguments to control behavior.
2027 function wp_die( $message = '', $title = '', $args = array() ) {
2028 if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
2029 $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );
2030 elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST )
2031 $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' );
2033 $function = apply_filters( 'wp_die_handler', '_default_wp_die_handler' );
2035 call_user_func( $function, $message, $title, $args );
2039 * Kill WordPress execution and display HTML message with error message.
2041 * This is the default handler for wp_die if you want a custom one for your
2042 * site then you can overload using the wp_die_handler filter in wp_die
2047 * @param string $message Error message.
2048 * @param string $title Error title.
2049 * @param string|array $args Optional arguments to control behavior.
2051 function _default_wp_die_handler( $message, $title = '', $args = array() ) {
2052 $defaults = array( 'response' => 500 );
2053 $r = wp_parse_args($args, $defaults);
2055 $have_gettext = function_exists('__');
2057 if ( function_exists( 'is_wp_error' ) && is_wp_error( $message ) ) {
2058 if ( empty( $title ) ) {
2059 $error_data = $message->get_error_data();
2060 if ( is_array( $error_data ) && isset( $error_data['title'] ) )
2061 $title = $error_data['title'];
2063 $errors = $message->get_error_messages();
2064 switch ( count( $errors ) ) :
2069 $message = "<p>{$errors[0]}</p>";
2072 $message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $errors ) . "</li>\n\t</ul>";
2075 } elseif ( is_string( $message ) ) {
2076 $message = "<p>$message</p>";
2079 if ( isset( $r['back_link'] ) && $r['back_link'] ) {
2080 $back_text = $have_gettext? __('« Back') : '« Back';
2081 $message .= "\n<p><a href='javascript:history.back()'>$back_text</a></p>";
2084 if ( ! did_action( 'admin_head' ) ) :
2085 if ( !headers_sent() ) {
2086 status_header( $r['response'] );
2088 header( 'Content-Type: text/html; charset=utf-8' );
2091 if ( empty($title) )
2092 $title = $have_gettext ? __('WordPress › Error') : 'WordPress › Error';
2094 $text_direction = 'ltr';
2095 if ( isset($r['text_direction']) && 'rtl' == $r['text_direction'] )
2096 $text_direction = 'rtl';
2097 elseif ( function_exists( 'is_rtl' ) && is_rtl() )
2098 $text_direction = 'rtl';
2101 <!-- Ticket #11289, IE bug fix: always pad the error page with enough characters such that it is greater than 512 bytes, even after gzip compression abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono
2103 <html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) language_attributes(); else echo "dir='$text_direction'"; ?>>
2105 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
2106 <title><?php echo $title ?></title>
2107 <style type="text/css">
2109 background: #f9f9f9;
2114 font-family: sans-serif;
2117 -webkit-border-radius: 3px;
2119 border: 1px solid #dfdfdf;
2123 border-bottom: 1px solid #dadada;
2126 font: 24px Georgia, "Times New Roman", Times, serif;
2129 padding-bottom: 7px;
2137 margin: 25px 0 20px;
2140 font-family: Consolas, Monaco, monospace;
2143 margin-bottom: 10px;
2148 text-decoration: none;
2154 display: inline-block;
2155 text-decoration: none;
2160 padding: 0 10px 1px;
2163 border-style: solid;
2164 -webkit-border-radius: 3px;
2166 white-space: nowrap;
2167 -webkit-box-sizing: border-box;
2168 -moz-box-sizing: border-box;
2169 box-sizing: border-box;
2170 background: #f3f3f3;
2171 background-image: -webkit-gradient(linear, left top, left bottom, from(#fefefe), to(#f4f4f4));
2172 background-image: -webkit-linear-gradient(top, #fefefe, #f4f4f4);
2173 background-image: -moz-linear-gradient(top, #fefefe, #f4f4f4);
2174 background-image: -o-linear-gradient(top, #fefefe, #f4f4f4);
2175 background-image: linear-gradient(to bottom, #fefefe, #f4f4f4);
2178 text-shadow: 0 1px 0 #fff;
2181 .button.button-large {
2189 background: #f3f3f3;
2190 background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#f3f3f3));
2191 background-image: -webkit-linear-gradient(top, #fff, #f3f3f3);
2192 background-image: -moz-linear-gradient(top, #fff, #f3f3f3);
2193 background-image: -ms-linear-gradient(top, #fff, #f3f3f3);
2194 background-image: -o-linear-gradient(top, #fff, #f3f3f3);
2195 background-image: linear-gradient(to bottom, #fff, #f3f3f3);
2201 -webkit-box-shadow: 1px 1px 1px rgba(0,0,0,.2);
2202 box-shadow: 1px 1px 1px rgba(0,0,0,.2);
2208 background-image: -webkit-gradient(linear, left top, left bottom, from(#f4f4f4), to(#fefefe));
2209 background-image: -webkit-linear-gradient(top, #f4f4f4, #fefefe);
2210 background-image: -moz-linear-gradient(top, #f4f4f4, #fefefe);
2211 background-image: -ms-linear-gradient(top, #f4f4f4, #fefefe);
2212 background-image: -o-linear-gradient(top, #f4f4f4, #fefefe);
2213 background-image: linear-gradient(to bottom, #f4f4f4, #fefefe);
2216 text-shadow: 0 -1px 0 #fff;
2217 -webkit-box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
2218 box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
2221 <?php if ( 'rtl' == $text_direction ) : ?>
2222 body { font-family: Tahoma, Arial; }
2226 <body id="error-page">
2227 <?php endif; // ! did_action( 'admin_head' ) ?>
2228 <?php echo $message; ?>
2236 * Kill WordPress execution and display XML message with error message.
2238 * This is the handler for wp_die when processing XMLRPC requests.
2243 * @param string $message Error message.
2244 * @param string $title Error title.
2245 * @param string|array $args Optional arguments to control behavior.
2247 function _xmlrpc_wp_die_handler( $message, $title = '', $args = array() ) {
2248 global $wp_xmlrpc_server;
2249 $defaults = array( 'response' => 500 );
2251 $r = wp_parse_args($args, $defaults);
2253 if ( $wp_xmlrpc_server ) {
2254 $error = new IXR_Error( $r['response'] , $message);
2255 $wp_xmlrpc_server->output( $error->getXml() );
2261 * Kill WordPress ajax execution.
2263 * This is the handler for wp_die when processing Ajax requests.
2268 * @param string $message Optional. Response to print.
2270 function _ajax_wp_die_handler( $message = '' ) {
2271 if ( is_scalar( $message ) )
2272 die( (string) $message );
2277 * Kill WordPress execution.
2279 * This is the handler for wp_die when processing APP requests.
2284 * @param string $message Optional. Response to print.
2286 function _scalar_wp_die_handler( $message = '' ) {
2287 if ( is_scalar( $message ) )
2288 die( (string) $message );
2293 * Send a JSON response back to an Ajax request.
2297 * @param mixed $response Variable (usually an array or object) to encode as JSON, then print and die.
2299 function wp_send_json( $response ) {
2300 @header( 'Content-Type: application/json; charset=' . get_option( 'blog_charset' ) );
2301 echo json_encode( $response );
2302 if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
2309 * Send a JSON response back to an Ajax request, indicating success.
2313 * @param mixed $data Data to encode as JSON, then print and die.
2315 function wp_send_json_success( $data = null ) {
2316 $response = array( 'success' => true );
2318 if ( isset( $data ) )
2319 $response['data'] = $data;
2321 wp_send_json( $response );
2325 * Send a JSON response back to an Ajax request, indicating failure.
2329 * @param mixed $data Data to encode as JSON, then print and die.
2331 function wp_send_json_error( $data = null ) {
2332 $response = array( 'success' => false );
2334 if ( isset( $data ) )
2335 $response['data'] = $data;
2337 wp_send_json( $response );
2341 * Retrieve the WordPress home page URL.
2343 * If the constant named 'WP_HOME' exists, then it will be used and returned by
2344 * the function. This can be used to counter the redirection on your local
2345 * development environment.
2348 * @package WordPress
2351 * @param string $url URL for the home location
2352 * @return string Homepage location.
2354 function _config_wp_home( $url = '' ) {
2355 if ( defined( 'WP_HOME' ) )
2356 return untrailingslashit( WP_HOME );
2361 * Retrieve the WordPress site URL.
2363 * If the constant named 'WP_SITEURL' is defined, then the value in that
2364 * constant will always be returned. This can be used for debugging a site on
2365 * your localhost while not having to change the database to your URL.
2368 * @package WordPress
2371 * @param string $url URL to set the WordPress site location.
2372 * @return string The WordPress Site URL
2374 function _config_wp_siteurl( $url = '' ) {
2375 if ( defined( 'WP_SITEURL' ) )
2376 return untrailingslashit( WP_SITEURL );
2381 * Set the localized direction for MCE plugin.
2383 * Will only set the direction to 'rtl', if the WordPress locale has the text
2384 * direction set to 'rtl'.
2386 * Fills in the 'directionality', 'plugins', and 'theme_advanced_button1' array
2387 * keys. These keys are then returned in the $input array.
2390 * @package WordPress
2394 * @param array $input MCE plugin array.
2395 * @return array Direction set for 'rtl', if needed by locale.
2397 function _mce_set_direction( $input ) {
2399 $input['directionality'] = 'rtl';
2400 $input['plugins'] .= ',directionality';
2401 $input['theme_advanced_buttons1'] .= ',ltr';
2408 * Convert smiley code to the icon graphic file equivalent.
2410 * You can turn off smilies, by going to the write setting screen and unchecking
2411 * the box, or by setting 'use_smilies' option to false or removing the option.
2413 * Plugins may override the default smiley list by setting the $wpsmiliestrans
2414 * to an array, with the key the code the blogger types in and the value the
2417 * The $wp_smiliessearch global is for the regular expression and is set each
2418 * time the function is called.
2420 * The full list of smilies can be found in the function and won't be listed in
2421 * the description. Probably should create a Codex page for it, so that it is
2424 * @global array $wpsmiliestrans
2425 * @global array $wp_smiliessearch
2428 function smilies_init() {
2429 global $wpsmiliestrans, $wp_smiliessearch;
2431 // don't bother setting up smilies if they are disabled
2432 if ( !get_option( 'use_smilies' ) )
2435 if ( !isset( $wpsmiliestrans ) ) {
2436 $wpsmiliestrans = array(
2437 ':mrgreen:' => 'icon_mrgreen.gif',
2438 ':neutral:' => 'icon_neutral.gif',
2439 ':twisted:' => 'icon_twisted.gif',
2440 ':arrow:' => 'icon_arrow.gif',
2441 ':shock:' => 'icon_eek.gif',
2442 ':smile:' => 'icon_smile.gif',
2443 ':???:' => 'icon_confused.gif',
2444 ':cool:' => 'icon_cool.gif',
2445 ':evil:' => 'icon_evil.gif',
2446 ':grin:' => 'icon_biggrin.gif',
2447 ':idea:' => 'icon_idea.gif',
2448 ':oops:' => 'icon_redface.gif',
2449 ':razz:' => 'icon_razz.gif',
2450 ':roll:' => 'icon_rolleyes.gif',
2451 ':wink:' => 'icon_wink.gif',
2452 ':cry:' => 'icon_cry.gif',
2453 ':eek:' => 'icon_surprised.gif',
2454 ':lol:' => 'icon_lol.gif',
2455 ':mad:' => 'icon_mad.gif',
2456 ':sad:' => 'icon_sad.gif',
2457 '8-)' => 'icon_cool.gif',
2458 '8-O' => 'icon_eek.gif',
2459 ':-(' => 'icon_sad.gif',
2460 ':-)' => 'icon_smile.gif',
2461 ':-?' => 'icon_confused.gif',
2462 ':-D' => 'icon_biggrin.gif',
2463 ':-P' => 'icon_razz.gif',
2464 ':-o' => 'icon_surprised.gif',
2465 ':-x' => 'icon_mad.gif',
2466 ':-|' => 'icon_neutral.gif',
2467 ';-)' => 'icon_wink.gif',
2468 // This one transformation breaks regular text with frequency.
2469 // '8)' => 'icon_cool.gif',
2470 '8O' => 'icon_eek.gif',
2471 ':(' => 'icon_sad.gif',
2472 ':)' => 'icon_smile.gif',
2473 ':?' => 'icon_confused.gif',
2474 ':D' => 'icon_biggrin.gif',
2475 ':P' => 'icon_razz.gif',
2476 ':o' => 'icon_surprised.gif',
2477 ':x' => 'icon_mad.gif',
2478 ':|' => 'icon_neutral.gif',
2479 ';)' => 'icon_wink.gif',
2480 ':!:' => 'icon_exclaim.gif',
2481 ':?:' => 'icon_question.gif',
2485 if (count($wpsmiliestrans) == 0) {
2490 * NOTE: we sort the smilies in reverse key order. This is to make sure
2491 * we match the longest possible smilie (:???: vs :?) as the regular
2492 * expression used below is first-match
2494 krsort($wpsmiliestrans);
2496 $wp_smiliessearch = '/(?:\s|^)';
2499 foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
2500 $firstchar = substr($smiley, 0, 1);
2501 $rest = substr($smiley, 1);
2504 if ($firstchar != $subchar) {
2505 if ($subchar != '') {
2506 $wp_smiliessearch .= ')|(?:\s|^)';
2508 $subchar = $firstchar;
2509 $wp_smiliessearch .= preg_quote($firstchar, '/') . '(?:';
2511 $wp_smiliessearch .= '|';
2513 $wp_smiliessearch .= preg_quote($rest, '/');
2516 $wp_smiliessearch .= ')(?:\s|$)/m';
2520 * Merge user defined arguments into defaults array.
2522 * This function is used throughout WordPress to allow for both string or array
2523 * to be merged into another array.
2527 * @param string|array $args Value to merge with $defaults
2528 * @param array $defaults Array that serves as the defaults.
2529 * @return array Merged user defined values with defaults.
2531 function wp_parse_args( $args, $defaults = '' ) {
2532 if ( is_object( $args ) )
2533 $r = get_object_vars( $args );
2534 elseif ( is_array( $args ) )
2537 wp_parse_str( $args, $r );
2539 if ( is_array( $defaults ) )
2540 return array_merge( $defaults, $r );
2545 * Clean up an array, comma- or space-separated list of IDs.
2549 * @param array|string $list
2550 * @return array Sanitized array of IDs
2552 function wp_parse_id_list( $list ) {
2553 if ( !is_array($list) )
2554 $list = preg_split('/[\s,]+/', $list);
2556 return array_unique(array_map('absint', $list));
2560 * Extract a slice of an array, given a list of keys.
2564 * @param array $array The original array
2565 * @param array $keys The list of keys
2566 * @return array The array slice
2568 function wp_array_slice_assoc( $array, $keys ) {
2570 foreach ( $keys as $key )
2571 if ( isset( $array[ $key ] ) )
2572 $slice[ $key ] = $array[ $key ];
2578 * Filters a list of objects, based on a set of key => value arguments.
2582 * @param array $list An array of objects to filter
2583 * @param array $args An array of key => value arguments to match against each object
2584 * @param string $operator The logical operation to perform. 'or' means only one element
2585 * from the array needs to match; 'and' means all elements must match. The default is 'and'.
2586 * @param bool|string $field A field from the object to place instead of the entire object
2587 * @return array A list of objects or object fields
2589 function wp_filter_object_list( $list, $args = array(), $operator = 'and', $field = false ) {
2590 if ( ! is_array( $list ) )
2593 $list = wp_list_filter( $list, $args, $operator );
2596 $list = wp_list_pluck( $list, $field );
2602 * Filters a list of objects, based on a set of key => value arguments.
2606 * @param array $list An array of objects to filter
2607 * @param array $args An array of key => value arguments to match against each object
2608 * @param string $operator The logical operation to perform:
2609 * 'AND' means all elements from the array must match;
2610 * 'OR' means only one element needs to match;
2611 * 'NOT' means no elements may match.
2612 * The default is 'AND'.
2615 function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
2616 if ( ! is_array( $list ) )
2619 if ( empty( $args ) )
2622 $operator = strtoupper( $operator );
2623 $count = count( $args );
2624 $filtered = array();
2626 foreach ( $list as $key => $obj ) {
2627 $to_match = (array) $obj;
2630 foreach ( $args as $m_key => $m_value ) {
2631 if ( array_key_exists( $m_key, $to_match ) && $m_value == $to_match[ $m_key ] )
2635 if ( ( 'AND' == $operator && $matched == $count )
2636 || ( 'OR' == $operator && $matched > 0 )
2637 || ( 'NOT' == $operator && 0 == $matched ) ) {
2638 $filtered[$key] = $obj;
2646 * Pluck a certain field out of each object in a list.
2650 * @param array $list A list of objects or arrays
2651 * @param int|string $field A field from the object to place instead of the entire object
2654 function wp_list_pluck( $list, $field ) {
2655 foreach ( $list as $key => $value ) {
2656 if ( is_object( $value ) )
2657 $list[ $key ] = $value->$field;
2659 $list[ $key ] = $value[ $field ];
2666 * Determines if Widgets library should be loaded.
2668 * Checks to make sure that the widgets library hasn't already been loaded. If
2669 * it hasn't, then it will load the widgets library and run an action hook.
2672 * @uses add_action() Calls '_admin_menu' hook with 'wp_widgets_add_menu' value.
2674 function wp_maybe_load_widgets() {
2675 if ( ! apply_filters('load_default_widgets', true) )
2677 require_once( ABSPATH . WPINC . '/default-widgets.php' );
2678 add_action( '_admin_menu', 'wp_widgets_add_menu' );
2682 * Append the Widgets menu to the themes main menu.
2685 * @uses $submenu The administration submenu list.
2687 function wp_widgets_add_menu() {
2690 if ( ! current_theme_supports( 'widgets' ) )
2693 $submenu['themes.php'][7] = array( __( 'Widgets' ), 'edit_theme_options', 'widgets.php' );
2694 ksort( $submenu['themes.php'], SORT_NUMERIC );
2698 * Flush all output buffers for PHP 5.2.
2700 * Make sure all output buffers are flushed before our singletons our destroyed.
2704 function wp_ob_end_flush_all() {
2705 $levels = ob_get_level();
2706 for ($i=0; $i<$levels; $i++)
2711 * Load custom DB error or display WordPress DB error.
2713 * If a file exists in the wp-content directory named db-error.php, then it will
2714 * be loaded instead of displaying the WordPress DB error. If it is not found,
2715 * then the WordPress DB error will be displayed instead.
2717 * The WordPress DB error sets the HTTP status header to 500 to try to prevent
2718 * search engines from caching the message. Custom DB messages should do the
2721 * This function was backported to the the WordPress 2.3.2, but originally was
2722 * added in WordPress 2.5.0.
2727 function dead_db() {
2730 // Load custom DB error template, if present.
2731 if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
2732 require_once( WP_CONTENT_DIR . '/db-error.php' );
2736 // If installing or in the admin, provide the verbose message.
2737 if ( defined('WP_INSTALLING') || defined('WP_ADMIN') )
2738 wp_die($wpdb->error);
2740 // Otherwise, be terse.
2741 status_header( 500 );
2743 header( 'Content-Type: text/html; charset=utf-8' );
2745 wp_load_translations_early();
2748 <html xmlns="http://www.w3.org/1999/xhtml"<?php if ( is_rtl() ) echo ' dir="rtl"'; ?>>
2750 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
2751 <title><?php _e( 'Database Error' ); ?></title>
2755 <h1><?php _e( 'Error establishing a database connection' ); ?></h1>
2763 * Converts value to nonnegative integer.
2767 * @param mixed $maybeint Data you wish to have converted to a nonnegative integer
2768 * @return int An nonnegative integer
2770 function absint( $maybeint ) {
2771 return abs( intval( $maybeint ) );
2775 * Determines if the blog can be accessed over SSL.
2777 * Determines if blog can be accessed over SSL by using cURL to access the site
2778 * using the https in the siteurl. Requires cURL extension to work correctly.
2782 * @param string $url
2783 * @return bool Whether SSL access is available
2785 function url_is_accessable_via_ssl($url)
2787 if ( in_array( 'curl', get_loaded_extensions() ) ) {
2788 $ssl = set_url_scheme( $url, 'https' );
2791 curl_setopt($ch, CURLOPT_URL, $ssl);
2792 curl_setopt($ch, CURLOPT_FAILONERROR, true);
2793 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
2794 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
2795 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
2799 $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
2802 if ($status == 200 || $status == 401) {
2810 * Marks a function as deprecated and informs when it has been used.
2812 * There is a hook deprecated_function_run that will be called that can be used
2813 * to get the backtrace up to what file and function called the deprecated
2816 * The current behavior is to trigger a user error if WP_DEBUG is true.
2818 * This function is to be used in every function that is deprecated.
2820 * @package WordPress
2825 * @uses do_action() Calls 'deprecated_function_run' and passes the function name, what to use instead,
2826 * and the version the function was deprecated in.
2827 * @uses apply_filters() Calls 'deprecated_function_trigger_error' and expects boolean value of true to do
2828 * trigger or false to not trigger error.
2830 * @param string $function The function that was called
2831 * @param string $version The version of WordPress that deprecated the function
2832 * @param string $replacement Optional. The function that should have been called
2834 function _deprecated_function( $function, $version, $replacement = null ) {
2836 do_action( 'deprecated_function_run', $function, $replacement, $version );
2838 // Allow plugin to filter the output error trigger
2839 if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
2840 if ( ! is_null($replacement) )
2841 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
2843 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2848 * Marks a file as deprecated and informs when it has been used.
2850 * There is a hook deprecated_file_included that will be called that can be used
2851 * to get the backtrace up to what file and function included the deprecated
2854 * The current behavior is to trigger a user error if WP_DEBUG is true.
2856 * This function is to be used in every file that is deprecated.
2858 * @package WordPress
2863 * @uses do_action() Calls 'deprecated_file_included' and passes the file name, what to use instead,
2864 * the version in which the file was deprecated, and any message regarding the change.
2865 * @uses apply_filters() Calls 'deprecated_file_trigger_error' and expects boolean value of true to do
2866 * trigger or false to not trigger error.
2868 * @param string $file The file that was included
2869 * @param string $version The version of WordPress that deprecated the file
2870 * @param string $replacement Optional. The file that should have been included based on ABSPATH
2871 * @param string $message Optional. A message regarding the change
2873 function _deprecated_file( $file, $version, $replacement = null, $message = '' ) {
2875 do_action( 'deprecated_file_included', $file, $replacement, $version, $message );
2877 // Allow plugin to filter the output error trigger
2878 if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
2879 $message = empty( $message ) ? '' : ' ' . $message;
2880 if ( ! is_null( $replacement ) )
2881 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message );
2883 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message );
2887 * Marks a function argument as deprecated and informs when it has been used.
2889 * This function is to be used whenever a deprecated function argument is used.
2890 * Before this function is called, the argument must be checked for whether it was
2891 * used by comparing it to its default value or evaluating whether it is empty.
2894 * if ( !empty($deprecated) )
2895 * _deprecated_argument( __FUNCTION__, '3.0' );
2898 * There is a hook deprecated_argument_run that will be called that can be used
2899 * to get the backtrace up to what file and function used the deprecated
2902 * The current behavior is to trigger a user error if WP_DEBUG is true.
2904 * @package WordPress
2909 * @uses do_action() Calls 'deprecated_argument_run' and passes the function name, a message on the change,
2910 * and the version in which the argument was deprecated.
2911 * @uses apply_filters() Calls 'deprecated_argument_trigger_error' and expects boolean value of true to do
2912 * trigger or false to not trigger error.
2914 * @param string $function The function that was called
2915 * @param string $version The version of WordPress that deprecated the argument used
2916 * @param string $message Optional. A message regarding the change.
2918 function _deprecated_argument( $function, $version, $message = null ) {
2920 do_action( 'deprecated_argument_run', $function, $message, $version );
2922 // Allow plugin to filter the output error trigger
2923 if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
2924 if ( ! is_null( $message ) )
2925 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) );
2927 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
2932 * Marks something as being incorrectly called.
2934 * There is a hook doing_it_wrong_run that will be called that can be used
2935 * to get the backtrace up to what file and function called the deprecated
2938 * The current behavior is to trigger a user error if WP_DEBUG is true.
2940 * @package WordPress
2945 * @uses do_action() Calls 'doing_it_wrong_run' and passes the function arguments.
2946 * @uses apply_filters() Calls 'doing_it_wrong_trigger_error' and expects boolean value of true to do
2947 * trigger or false to not trigger error.
2949 * @param string $function The function that was called.
2950 * @param string $message A message explaining what has been done incorrectly.
2951 * @param string $version The version of WordPress where the message was added.
2953 function _doing_it_wrong( $function, $message, $version ) {
2955 do_action( 'doing_it_wrong_run', $function, $message, $version );
2957 // Allow plugin to filter the output error trigger
2958 if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
2959 if ( function_exists( '__' ) ) {
2960 $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
2961 $message .= ' ' . __( 'Please see <a href="http://codex.wordpress.org/Debugging_in_WordPress">Debugging in WordPress</a> for more information.' );
2962 trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
2964 $version = is_null( $version ) ? '' : sprintf( '(This message was added in version %s.)', $version );
2965 $message .= ' Please see <a href="http://codex.wordpress.org/Debugging_in_WordPress">Debugging in WordPress</a> for more information.';
2966 trigger_error( sprintf( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s', $function, $message, $version ) );
2972 * Is the server running earlier than 1.5.0 version of lighttpd?
2976 * @return bool Whether the server is running lighttpd < 1.5.0
2978 function is_lighttpd_before_150() {
2979 $server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] )? $_SERVER['SERVER_SOFTWARE'] : '' );
2980 $server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : '';
2981 return 'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
2985 * Does the specified module exist in the Apache config?
2989 * @param string $mod e.g. mod_rewrite
2990 * @param bool $default The default return value if the module is not found
2993 function apache_mod_loaded($mod, $default = false) {
2999 if ( function_exists('apache_get_modules') ) {
3000 $mods = apache_get_modules();
3001 if ( in_array($mod, $mods) )
3003 } elseif ( function_exists('phpinfo') ) {
3006 $phpinfo = ob_get_clean();
3007 if ( false !== strpos($phpinfo, $mod) )
3014 * Check if IIS 7 supports pretty permalinks.
3020 function iis7_supports_permalinks() {
3023 $supports_permalinks = false;
3025 /* First we check if the DOMDocument class exists. If it does not exist,
3026 * which is the case for PHP 4.X, then we cannot easily update the xml configuration file,
3027 * hence we just bail out and tell user that pretty permalinks cannot be used.
3028 * This is not a big issue because PHP 4.X is going to be deprecated and for IIS it
3029 * is recommended to use PHP 5.X NTS.
3030 * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
3031 * URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
3032 * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
3033 * via ISAPI then pretty permalinks will not work.
3035 $supports_permalinks = class_exists('DOMDocument') && isset($_SERVER['IIS_UrlRewriteModule']) && ( php_sapi_name() == 'cgi-fcgi' );
3038 return apply_filters('iis7_supports_permalinks', $supports_permalinks);
3042 * File validates against allowed set of defined rules.
3044 * A return value of '1' means that the $file contains either '..' or './'. A
3045 * return value of '2' means that the $file contains ':' after the first
3046 * character. A return value of '3' means that the file is not in the allowed
3051 * @param string $file File path.
3052 * @param array $allowed_files List of allowed files.
3053 * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
3055 function validate_file( $file, $allowed_files = '' ) {
3056 if ( false !== strpos( $file, '..' ) )
3059 if ( false !== strpos( $file, './' ) )
3062 if ( ! empty( $allowed_files ) && ! in_array( $file, $allowed_files ) )
3065 if (':' == substr( $file, 1, 1 ) )
3072 * Determine if SSL is used.
3076 * @return bool True if SSL, false if not used.
3079 if ( isset($_SERVER['HTTPS']) ) {
3080 if ( 'on' == strtolower($_SERVER['HTTPS']) )
3082 if ( '1' == $_SERVER['HTTPS'] )
3084 } elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
3091 * Whether SSL login should be forced.
3095 * @param string|bool $force Optional.
3096 * @return bool True if forced, false if not forced.
3098 function force_ssl_login( $force = null ) {
3099 static $forced = false;
3101 if ( !is_null( $force ) ) {
3102 $old_forced = $forced;
3111 * Whether to force SSL used for the Administration Screens.
3115 * @param string|bool $force
3116 * @return bool True if forced, false if not forced.
3118 function force_ssl_admin( $force = null ) {
3119 static $forced = false;
3121 if ( !is_null( $force ) ) {
3122 $old_forced = $forced;
3131 * Guess the URL for the site.
3133 * Will remove wp-admin links to retrieve only return URLs not in the wp-admin
3140 function wp_guess_url() {
3141 if ( defined('WP_SITEURL') && '' != WP_SITEURL ) {
3144 $schema = is_ssl() ? 'https://' : 'http://'; // set_url_scheme() is not defined yet
3145 $url = preg_replace( '#/(wp-admin/.*|wp-login.php)#i', '', $schema . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
3148 return rtrim($url, '/');
3152 * Temporarily suspend cache additions.
3154 * Stops more data being added to the cache, but still allows cache retrieval.
3155 * This is useful for actions, such as imports, when a lot of data would otherwise
3156 * be almost uselessly added to the cache.
3158 * Suspension lasts for a single page load at most. Remember to call this
3159 * function again if you wish to re-enable cache adds earlier.
3163 * @param bool $suspend Optional. Suspends additions if true, re-enables them if false.
3164 * @return bool The current suspend setting
3166 function wp_suspend_cache_addition( $suspend = null ) {
3167 static $_suspend = false;
3169 if ( is_bool( $suspend ) )
3170 $_suspend = $suspend;
3176 * Suspend cache invalidation.
3178 * Turns cache invalidation on and off. Useful during imports where you don't wont to do invalidations
3179 * every time a post is inserted. Callers must be sure that what they are doing won't lead to an inconsistent
3180 * cache when invalidation is suspended.
3184 * @param bool $suspend Whether to suspend or enable cache invalidation
3185 * @return bool The current suspend setting
3187 function wp_suspend_cache_invalidation($suspend = true) {
3188 global $_wp_suspend_cache_invalidation;
3190 $current_suspend = $_wp_suspend_cache_invalidation;
3191 $_wp_suspend_cache_invalidation = $suspend;
3192 return $current_suspend;
3200 * @package WordPress
3202 * @param int $blog_id optional blog id to test (default current blog)
3203 * @return bool True if not multisite or $blog_id is main site
3205 function is_main_site( $blog_id = '' ) {
3206 global $current_site;
3208 if ( ! is_multisite() )
3212 $blog_id = get_current_blog_id();
3214 return $blog_id == $current_site->blog_id;
3218 * Whether global terms are enabled.
3222 * @package WordPress
3224 * @return bool True if multisite and global terms enabled
3226 function global_terms_enabled() {
3227 if ( ! is_multisite() )
3230 static $global_terms = null;
3231 if ( is_null( $global_terms ) ) {
3232 $filter = apply_filters( 'global_terms_enabled', null );
3233 if ( ! is_null( $filter ) )
3234 $global_terms = (bool) $filter;
3236 $global_terms = (bool) get_site_option( 'global_terms_enabled', false );
3238 return $global_terms;
3242 * gmt_offset modification for smart timezone handling.
3244 * Overrides the gmt_offset option if we have a timezone_string available.
3248 * @return float|bool
3250 function wp_timezone_override_offset() {
3251 if ( !$timezone_string = get_option( 'timezone_string' ) ) {
3255 $timezone_object = timezone_open( $timezone_string );
3256 $datetime_object = date_create();
3257 if ( false === $timezone_object || false === $datetime_object ) {
3260 return round( timezone_offset_get( $timezone_object, $datetime_object ) / HOUR_IN_SECONDS, 2 );
3264 * {@internal Missing Short Description}}
3268 * @param unknown_type $a
3269 * @param unknown_type $b
3272 function _wp_timezone_choice_usort_callback( $a, $b ) {
3273 // Don't use translated versions of Etc
3274 if ( 'Etc' === $a['continent'] && 'Etc' === $b['continent'] ) {
3275 // Make the order of these more like the old dropdown
3276 if ( 'GMT+' === substr( $a['city'], 0, 4 ) && 'GMT+' === substr( $b['city'], 0, 4 ) ) {
3277 return -1 * ( strnatcasecmp( $a['city'], $b['city'] ) );
3279 if ( 'UTC' === $a['city'] ) {
3280 if ( 'GMT+' === substr( $b['city'], 0, 4 ) ) {
3285 if ( 'UTC' === $b['city'] ) {
3286 if ( 'GMT+' === substr( $a['city'], 0, 4 ) ) {
3291 return strnatcasecmp( $a['city'], $b['city'] );
3293 if ( $a['t_continent'] == $b['t_continent'] ) {
3294 if ( $a['t_city'] == $b['t_city'] ) {
3295 return strnatcasecmp( $a['t_subcity'], $b['t_subcity'] );
3297 return strnatcasecmp( $a['t_city'], $b['t_city'] );
3299 // Force Etc to the bottom of the list
3300 if ( 'Etc' === $a['continent'] ) {
3303 if ( 'Etc' === $b['continent'] ) {
3306 return strnatcasecmp( $a['t_continent'], $b['t_continent'] );
3311 * Gives a nicely formatted list of timezone strings. // temporary! Not in final
3315 * @param string $selected_zone Selected Zone
3318 function wp_timezone_choice( $selected_zone ) {
3319 static $mo_loaded = false;
3321 $continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific');
3323 // Load translations for continents and cities
3324 if ( !$mo_loaded ) {
3325 $locale = get_locale();
3326 $mofile = WP_LANG_DIR . '/continents-cities-' . $locale . '.mo';
3327 load_textdomain( 'continents-cities', $mofile );
3332 foreach ( timezone_identifiers_list() as $zone ) {
3333 $zone = explode( '/', $zone );
3334 if ( !in_array( $zone[0], $continents ) ) {
3338 // This determines what gets set and translated - we don't translate Etc/* strings here, they are done later
3340 0 => ( isset( $zone[0] ) && $zone[0] ),
3341 1 => ( isset( $zone[1] ) && $zone[1] ),
3342 2 => ( isset( $zone[2] ) && $zone[2] ),
3344 $exists[3] = ( $exists[0] && 'Etc' !== $zone[0] );
3345 $exists[4] = ( $exists[1] && $exists[3] );
3346 $exists[5] = ( $exists[2] && $exists[3] );
3349 'continent' => ( $exists[0] ? $zone[0] : '' ),
3350 'city' => ( $exists[1] ? $zone[1] : '' ),
3351 'subcity' => ( $exists[2] ? $zone[2] : '' ),
3352 't_continent' => ( $exists[3] ? translate( str_replace( '_', ' ', $zone[0] ), 'continents-cities' ) : '' ),
3353 't_city' => ( $exists[4] ? translate( str_replace( '_', ' ', $zone[1] ), 'continents-cities' ) : '' ),
3354 't_subcity' => ( $exists[5] ? translate( str_replace( '_', ' ', $zone[2] ), 'continents-cities' ) : '' )
3357 usort( $zonen, '_wp_timezone_choice_usort_callback' );
3359 $structure = array();
3361 if ( empty( $selected_zone ) ) {
3362 $structure[] = '<option selected="selected" value="">' . __( 'Select a city' ) . '</option>';
3365 foreach ( $zonen as $key => $zone ) {
3366 // Build value in an array to join later
3367 $value = array( $zone['continent'] );
3369 if ( empty( $zone['city'] ) ) {
3370 // It's at the continent level (generally won't happen)
3371 $display = $zone['t_continent'];
3373 // It's inside a continent group
3375 // Continent optgroup
3376 if ( !isset( $zonen[$key - 1] ) || $zonen[$key - 1]['continent'] !== $zone['continent'] ) {
3377 $label = $zone['t_continent'];
3378 $structure[] = '<optgroup label="'. esc_attr( $label ) .'">';
3381 // Add the city to the value
3382 $value[] = $zone['city'];
3384 $display = $zone['t_city'];
3385 if ( !empty( $zone['subcity'] ) ) {
3386 // Add the subcity to the value
3387 $value[] = $zone['subcity'];
3388 $display .= ' - ' . $zone['t_subcity'];
3393 $value = join( '/', $value );
3395 if ( $value === $selected_zone ) {
3396 $selected = 'selected="selected" ';
3398 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $value ) . '">' . esc_html( $display ) . "</option>";
3400 // Close continent optgroup
3401 if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) {
3402 $structure[] = '</optgroup>';
3407 $structure[] = '<optgroup label="'. esc_attr__( 'UTC' ) .'">';
3409 if ( 'UTC' === $selected_zone )
3410 $selected = 'selected="selected" ';
3411 $structure[] = '<option ' . $selected . 'value="' . esc_attr( 'UTC' ) . '">' . __('UTC') . '</option>';
3412 $structure[] = '</optgroup>';
3414 // Do manual UTC offsets
3415 $structure[] = '<optgroup label="'. esc_attr__( 'Manual Offsets' ) .'">';
3416 $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,
3417 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);
3418 foreach ( $offset_range as $offset ) {
3420 $offset_name = '+' . $offset;
3422 $offset_name = (string) $offset;
3424 $offset_value = $offset_name;
3425 $offset_name = str_replace(array('.25','.5','.75'), array(':15',':30',':45'), $offset_name);
3426 $offset_name = 'UTC' . $offset_name;
3427 $offset_value = 'UTC' . $offset_value;
3429 if ( $offset_value === $selected_zone )
3430 $selected = 'selected="selected" ';
3431 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $offset_value ) . '">' . esc_html( $offset_name ) . "</option>";
3434 $structure[] = '</optgroup>';
3436 return join( "\n", $structure );
3440 * Strip close comment and close php tags from file headers used by WP.
3441 * See http://core.trac.wordpress.org/ticket/8497
3445 * @param string $str
3448 function _cleanup_header_comment($str) {
3449 return trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $str));
3453 * Permanently deletes posts, pages, attachments, and comments which have been in the trash for EMPTY_TRASH_DAYS.
3457 function wp_scheduled_delete() {
3460 $delete_timestamp = time() - ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );
3462 $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);
3464 foreach ( (array) $posts_to_delete as $post ) {
3465 $post_id = (int) $post['post_id'];
3469 $del_post = get_post($post_id);
3471 if ( !$del_post || 'trash' != $del_post->post_status ) {
3472 delete_post_meta($post_id, '_wp_trash_meta_status');
3473 delete_post_meta($post_id, '_wp_trash_meta_time');
3475 wp_delete_post($post_id);
3479 $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);
3481 foreach ( (array) $comments_to_delete as $comment ) {
3482 $comment_id = (int) $comment['comment_id'];
3486 $del_comment = get_comment($comment_id);
3488 if ( !$del_comment || 'trash' != $del_comment->comment_approved ) {
3489 delete_comment_meta($comment_id, '_wp_trash_meta_time');
3490 delete_comment_meta($comment_id, '_wp_trash_meta_status');
3492 wp_delete_comment($comment_id);
3498 * Retrieve metadata from a file.
3500 * Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
3501 * Each piece of metadata must be on its own line. Fields can not span multiple
3502 * lines, the value will get cut at the end of the first line.
3504 * If the file data is not within that first 8kiB, then the author should correct
3505 * their plugin file and move the data headers to the top.
3507 * @see http://codex.wordpress.org/File_Header
3510 * @param string $file Path to the file
3511 * @param array $default_headers List of headers, in the format array('HeaderKey' => 'Header Name')
3512 * @param string $context If specified adds filter hook "extra_{$context}_headers"
3514 function get_file_data( $file, $default_headers, $context = '' ) {
3515 // We don't need to write to the file, so just open for reading.
3516 $fp = fopen( $file, 'r' );
3518 // Pull only the first 8kiB of the file in.
3519 $file_data = fread( $fp, 8192 );
3521 // PHP will close file handle, but we are good citizens.
3524 // Make sure we catch CR-only line endings.
3525 $file_data = str_replace( "\r", "\n", $file_data );
3527 if ( $context && $extra_headers = apply_filters( "extra_{$context}_headers", array() ) ) {
3528 $extra_headers = array_combine( $extra_headers, $extra_headers ); // keys equal values
3529 $all_headers = array_merge( $extra_headers, (array) $default_headers );
3531 $all_headers = $default_headers;
3534 foreach ( $all_headers as $field => $regex ) {
3535 if ( preg_match( '/^[ \t\/*#@]*' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, $match ) && $match[1] )
3536 $all_headers[ $field ] = _cleanup_header_comment( $match[1] );
3538 $all_headers[ $field ] = '';
3541 return $all_headers;
3545 * Used internally to tidy up the search terms.
3553 function _search_terms_tidy($t) {
3554 return trim($t, "\"'\n\r ");
3560 * Useful for returning true to filters easily.
3563 * @see __return_false()
3566 function __return_true() {
3573 * Useful for returning false to filters easily.
3576 * @see __return_true()
3577 * @return bool false
3579 function __return_false() {
3586 * Useful for returning 0 to filters easily.
3589 * @see __return_zero()
3592 function __return_zero() {
3597 * Returns an empty array.
3599 * Useful for returning an empty array to filters easily.
3602 * @see __return_zero()
3603 * @return array Empty array
3605 function __return_empty_array() {
3612 * Useful for returning null to filters easily.
3617 function __return_null() {
3622 * Send a HTTP header to disable content type sniffing in browsers which support it.
3624 * @link http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
3625 * @link http://src.chromium.org/viewvc/chrome?view=rev&revision=6985
3630 function send_nosniff_header() {
3631 @header( 'X-Content-Type-Options: nosniff' );
3635 * Returns a MySQL expression for selecting the week number based on the start_of_week option.
3639 * @param string $column
3642 function _wp_mysql_week( $column ) {
3643 switch ( $start_of_week = (int) get_option( 'start_of_week' ) ) {
3646 return "WEEK( $column, 0 )";
3648 return "WEEK( $column, 1 )";
3654 return "WEEK( DATE_SUB( $column, INTERVAL $start_of_week DAY ), 0 )";
3659 * Finds hierarchy loops using a callback function that maps object IDs to parent IDs.
3664 * @param callback $callback function that accepts ( ID, $callback_args ) and outputs parent_ID
3665 * @param int $start The ID to start the loop check at
3666 * @param int $start_parent the parent_ID of $start to use instead of calling $callback( $start ). Use null to always use $callback
3667 * @param array $callback_args optional additional arguments to send to $callback
3668 * @return array IDs of all members of loop
3670 function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
3671 $override = is_null( $start_parent ) ? array() : array( $start => $start_parent );
3673 if ( !$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args ) )
3676 return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
3680 * Uses the "The Tortoise and the Hare" algorithm to detect loops.
3682 * For every step of the algorithm, the hare takes two steps and the tortoise one.
3683 * If the hare ever laps the tortoise, there must be a loop.
3688 * @param callback $callback function that accepts ( ID, callback_arg, ... ) and outputs parent_ID
3689 * @param int $start The ID to start the loop check at
3690 * @param array $override an array of ( ID => parent_ID, ... ) to use instead of $callback
3691 * @param array $callback_args optional additional arguments to send to $callback
3692 * @param bool $_return_loop Return loop members or just detect presence of loop?
3693 * Only set to true if you already know the given $start is part of a loop
3694 * (otherwise the returned array might include branches)
3695 * @return mixed scalar ID of some arbitrary member of the loop, or array of IDs of all members of loop if $_return_loop
3697 function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) {
3698 $tortoise = $hare = $evanescent_hare = $start;
3701 // Set evanescent_hare to one past hare
3702 // Increment hare two steps
3706 ( $evanescent_hare = isset( $override[$hare] ) ? $override[$hare] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) )
3708 ( $hare = isset( $override[$evanescent_hare] ) ? $override[$evanescent_hare] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) )
3710 if ( $_return_loop )
3711 $return[$tortoise] = $return[$evanescent_hare] = $return[$hare] = true;
3713 // tortoise got lapped - must be a loop
3714 if ( $tortoise == $evanescent_hare || $tortoise == $hare )
3715 return $_return_loop ? $return : $tortoise;
3717 // Increment tortoise by one step
3718 $tortoise = isset( $override[$tortoise] ) ? $override[$tortoise] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) );
3725 * Send a HTTP header to limit rendering of pages to same origin iframes.
3727 * @link https://developer.mozilla.org/en/the_x-frame-options_response_header
3732 function send_frame_options_header() {
3733 @header( 'X-Frame-Options: SAMEORIGIN' );
3737 * Retrieve a list of protocols to allow in HTML attributes.
3743 * @return array Array of allowed protocols
3745 function wp_allowed_protocols() {
3748 if ( empty( $protocols ) ) {
3749 $protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp' );
3750 $protocols = apply_filters( 'kses_allowed_protocols', $protocols );
3757 * Return a comma separated string of functions that have been called to get to the current point in code.
3759 * @link http://core.trac.wordpress.org/ticket/19589
3762 * @param string $ignore_class A class to ignore all function calls within - useful when you want to just give info about the callee
3763 * @param int $skip_frames A number of stack frames to skip - useful for unwinding back to the source of the issue
3764 * @param bool $pretty Whether or not you want a comma separated string or raw array returned
3765 * @return string|array Either a string containing a reversed comma separated trace or an array of individual calls.
3767 function wp_debug_backtrace_summary( $ignore_class = null, $skip_frames = 0, $pretty = true ) {
3768 if ( version_compare( PHP_VERSION, '5.2.5', '>=' ) )
3769 $trace = debug_backtrace( false );
3771 $trace = debug_backtrace();
3774 $check_class = ! is_null( $ignore_class );
3775 $skip_frames++; // skip this function
3777 foreach ( $trace as $call ) {
3778 if ( $skip_frames > 0 ) {
3780 } elseif ( isset( $call['class'] ) ) {
3781 if ( $check_class && $ignore_class == $call['class'] )
3782 continue; // Filter out calls
3784 $caller[] = "{$call['class']}{$call['type']}{$call['function']}";
3786 if ( in_array( $call['function'], array( 'do_action', 'apply_filters' ) ) ) {
3787 $caller[] = "{$call['function']}('{$call['args'][0]}')";
3788 } elseif ( in_array( $call['function'], array( 'include', 'include_once', 'require', 'require_once' ) ) ) {
3789 $caller[] = $call['function'] . "('" . str_replace( array( WP_CONTENT_DIR, ABSPATH ) , '', $call['args'][0] ) . "')";
3791 $caller[] = $call['function'];
3796 return join( ', ', array_reverse( $caller ) );
3802 * Retrieve ids that are not already present in the cache
3806 * @param array $object_ids ID list
3807 * @param string $cache_key The cache bucket to check against
3811 function _get_non_cached_ids( $object_ids, $cache_key ) {
3813 foreach ( $object_ids as $id ) {
3815 if ( !wp_cache_get( $id, $cache_key ) ) {
3824 * Test if the current device has the capability to upload files.
3829 * @return bool true|false
3831 function _device_can_upload() {
3832 if ( ! wp_is_mobile() )
3835 $ua = $_SERVER['HTTP_USER_AGENT'];
3837 if ( strpos($ua, 'iPhone') !== false
3838 || strpos($ua, 'iPad') !== false
3839 || strpos($ua, 'iPod') !== false ) {
3840 return preg_match( '#OS ([\d_]+) like Mac OS X#', $ua, $version ) && version_compare( $version[1], '6', '>=' );
3847 * Test if a given path is a stream URL
3849 * @param string $path The resource path or URL
3850 * @return bool True if the path is a stream URL
3852 function wp_is_stream( $path ) {
3853 $wrappers = stream_get_wrappers();
3854 $wrappers_re = '(' . join('|', $wrappers) . ')';
3856 return preg_match( "!^$wrappers_re://!", $path ) === 1;
3860 * Test if the supplied date is valid for the Gregorian calendar
3864 * @return bool true|false
3866 function wp_checkdate( $month, $day, $year, $source_date ) {
3867 return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );