8 require( ABSPATH . WPINC . '/option.php' );
11 * Convert 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 true.
24 * @return string|int|bool Formatted date string or Unix timestamp. False if $date is empty.
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.
49 * Other strings will be interpreted as PHP date formats (e.g. 'Y-m-d').
51 * If $gmt is set to either '1' or 'true', then both types will use GMT time.
52 * if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.
56 * @param string $type Type of time to retrieve. Accepts 'mysql', 'timestamp', or PHP date
57 * format string (e.g. 'Y-m-d').
58 * @param int|bool $gmt Optional. Whether to use GMT timezone. Default false.
59 * @return int|string Integer if $type is 'timestamp', string otherwise.
61 function current_time( $type, $gmt = 0 ) {
64 return ( $gmt ) ? gmdate( 'Y-m-d H:i:s' ) : gmdate( 'Y-m-d H:i:s', ( time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) ) );
66 return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
68 return ( $gmt ) ? date( $type ) : date( $type, time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) );
73 * Retrieve the date in localized format, based on timestamp.
75 * If the locale specifies the locale month and weekday, then the locale will
76 * take over the format for the date. If it isn't, then the date format string
77 * will be used instead.
81 * @global WP_Locale $wp_locale
83 * @param string $dateformatstring Format to display the date.
84 * @param bool|int $unixtimestamp Optional. Unix timestamp. Default false.
85 * @param bool $gmt Optional. Whether to use GMT timezone. Default false.
87 * @return string The date, translated if locale specifies it.
89 function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
94 $i = current_time( 'timestamp', $gmt );
98 * Store original value for language with untypical grammars.
99 * See https://core.trac.wordpress.org/ticket/9396
101 $req_format = $dateformatstring;
103 if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
104 $datemonth = $wp_locale->get_month( date( 'm', $i ) );
105 $datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
106 $dateweekday = $wp_locale->get_weekday( date( 'w', $i ) );
107 $dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
108 $datemeridiem = $wp_locale->get_meridiem( date( 'a', $i ) );
109 $datemeridiem_capital = $wp_locale->get_meridiem( date( 'A', $i ) );
110 $dateformatstring = ' '.$dateformatstring;
111 $dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
112 $dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );
113 $dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );
114 $dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
115 $dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );
116 $dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );
118 $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
120 $timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );
121 $timezone_formats_re = implode( '|', $timezone_formats );
122 if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {
123 $timezone_string = get_option( 'timezone_string' );
124 if ( $timezone_string ) {
125 $timezone_object = timezone_open( $timezone_string );
126 $date_object = date_create( null, $timezone_object );
127 foreach ( $timezone_formats as $timezone_format ) {
128 if ( false !== strpos( $dateformatstring, $timezone_format ) ) {
129 $formatted = date_format( $date_object, $timezone_format );
130 $dateformatstring = ' '.$dateformatstring;
131 $dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );
132 $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
137 $j = @date( $dateformatstring, $i );
140 * Filters the date formatted based on the locale.
144 * @param string $j Formatted date string.
145 * @param string $req_format Format to display the date.
146 * @param int $i Unix timestamp.
147 * @param bool $gmt Whether to convert to GMT for time. Default false.
149 $j = apply_filters( 'date_i18n', $j, $req_format, $i, $gmt );
154 * Determines if the date should be declined.
156 * If the locale specifies that month names require a genitive case in certain
157 * formats (like 'j F Y'), the month name will be replaced with a correct form.
161 * @param string $date Formatted date string.
162 * @return string The date, declined if locale specifies it.
164 function wp_maybe_decline_date( $date ) {
167 // i18n functions are not available in SHORTINIT mode
168 if ( ! function_exists( '_x' ) ) {
172 /* translators: If months in your language require a genitive case,
173 * translate this to 'on'. Do not translate into your own language.
175 if ( 'on' === _x( 'off', 'decline months names: on or off' ) ) {
176 // Match a format like 'j F Y' or 'j. F'
177 if ( @preg_match( '#^\d{1,2}\.? [^\d ]+#u', $date ) ) {
178 $months = $wp_locale->month;
179 $months_genitive = $wp_locale->month_genitive;
181 foreach ( $months as $key => $month ) {
182 $months[ $key ] = '# ' . $month . '( |$)#u';
185 foreach ( $months_genitive as $key => $month ) {
186 $months_genitive[ $key ] = ' ' . $month . '$1';
189 $date = preg_replace( $months, $months_genitive, $date );
193 // Used for locale-specific rules
194 $locale = get_locale();
196 if ( 'ca' === $locale ) {
197 // " de abril| de agost| de octubre..." -> " d'abril| d'agost| d'octubre..."
198 $date = preg_replace( '# de ([ao])#i', " d'\\1", $date );
205 * Convert float number to format based on the locale.
209 * @global WP_Locale $wp_locale
211 * @param float $number The number to convert based on locale.
212 * @param int $decimals Optional. Precision of the number of decimal places. Default 0.
213 * @return string Converted number in string format.
215 function number_format_i18n( $number, $decimals = 0 ) {
218 if ( isset( $wp_locale ) ) {
219 $formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
221 $formatted = number_format( $number, absint( $decimals ) );
225 * Filters the number formatted based on the locale.
229 * @param string $formatted Converted number in string format.
231 return apply_filters( 'number_format_i18n', $formatted );
235 * Convert number of bytes largest unit bytes will fit into.
237 * It is easier to read 1 KB than 1024 bytes and 1 MB than 1048576 bytes. Converts
238 * number of bytes to human readable number by taking the number of that unit
239 * that the bytes will go into it. Supports TB value.
241 * Please note that integers in PHP are limited to 32 bits, unless they are on
242 * 64 bit architecture, then they have 64 bit size. If you need to place the
243 * larger size then what PHP integer type will hold, then use a string. It will
244 * be converted to a double, which should always have 64 bit length.
246 * Technically the correct unit names for powers of 1024 are KiB, MiB etc.
250 * @param int|string $bytes Number of bytes. Note max integer size for integers.
251 * @param int $decimals Optional. Precision of number of decimal places. Default 0.
252 * @return string|false False on failure. Number string on success.
254 function size_format( $bytes, $decimals = 0 ) {
263 if ( 0 === $bytes ) {
264 return number_format_i18n( 0, $decimals ) . ' B';
267 foreach ( $quant as $unit => $mag ) {
268 if ( doubleval( $bytes ) >= $mag ) {
269 return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
277 * Get the week start and end from the datetime or date string from MySQL.
281 * @param string $mysqlstring Date or datetime field type from MySQL.
282 * @param int|string $start_of_week Optional. Start of the week as an integer. Default empty string.
283 * @return array Keys are 'start' and 'end'.
285 function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
286 // MySQL string year.
287 $my = substr( $mysqlstring, 0, 4 );
289 // MySQL string month.
290 $mm = substr( $mysqlstring, 8, 2 );
293 $md = substr( $mysqlstring, 5, 2 );
295 // The timestamp for MySQL string day.
296 $day = mktime( 0, 0, 0, $md, $mm, $my );
298 // The day of the week from the timestamp.
299 $weekday = date( 'w', $day );
301 if ( !is_numeric($start_of_week) )
302 $start_of_week = get_option( 'start_of_week' );
304 if ( $weekday < $start_of_week )
307 // The most recent week start day on or before $day.
308 $start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week );
310 // $start + 1 week - 1 second.
311 $end = $start + WEEK_IN_SECONDS - 1;
312 return compact( 'start', 'end' );
316 * Unserialize value only if it was serialized.
320 * @param string $original Maybe unserialized original, if is needed.
321 * @return mixed Unserialized data can be any type.
323 function maybe_unserialize( $original ) {
324 if ( is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
325 return @unserialize( $original );
330 * Check value to find if it was serialized.
332 * If $data is not an string, then returned value will always be false.
333 * Serialized data is always a string.
337 * @param string $data Value to check to see if was serialized.
338 * @param bool $strict Optional. Whether to be strict about the end of the string. Default true.
339 * @return bool False if not serialized and true if it was.
341 function is_serialized( $data, $strict = true ) {
342 // if it isn't a string, it isn't serialized.
343 if ( ! is_string( $data ) ) {
346 $data = trim( $data );
347 if ( 'N;' == $data ) {
350 if ( strlen( $data ) < 4 ) {
353 if ( ':' !== $data[1] ) {
357 $lastc = substr( $data, -1 );
358 if ( ';' !== $lastc && '}' !== $lastc ) {
362 $semicolon = strpos( $data, ';' );
363 $brace = strpos( $data, '}' );
364 // Either ; or } must exist.
365 if ( false === $semicolon && false === $brace )
367 // But neither must be in the first X characters.
368 if ( false !== $semicolon && $semicolon < 3 )
370 if ( false !== $brace && $brace < 4 )
377 if ( '"' !== substr( $data, -2, 1 ) ) {
380 } elseif ( false === strpos( $data, '"' ) ) {
383 // or else fall through
386 return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
390 $end = $strict ? '$' : '';
391 return (bool) preg_match( "/^{$token}:[0-9.E-]+;$end/", $data );
397 * Check whether serialized data is of string type.
401 * @param string $data Serialized data.
402 * @return bool False if not a serialized string, true if it is.
404 function is_serialized_string( $data ) {
405 // if it isn't a string, it isn't a serialized string.
406 if ( ! is_string( $data ) ) {
409 $data = trim( $data );
410 if ( strlen( $data ) < 4 ) {
412 } elseif ( ':' !== $data[1] ) {
414 } elseif ( ';' !== substr( $data, -1 ) ) {
416 } elseif ( $data[0] !== 's' ) {
418 } elseif ( '"' !== substr( $data, -2, 1 ) ) {
426 * Serialize data, if needed.
430 * @param string|array|object $data Data that might be serialized.
431 * @return mixed A scalar data
433 function maybe_serialize( $data ) {
434 if ( is_array( $data ) || is_object( $data ) )
435 return serialize( $data );
437 // Double serialization is required for backward compatibility.
438 // See https://core.trac.wordpress.org/ticket/12930
439 // Also the world will end. See WP 3.6.1.
440 if ( is_serialized( $data, false ) )
441 return serialize( $data );
447 * Retrieve post title from XMLRPC XML.
449 * If the title element is not part of the XML, then the default post title from
450 * the $post_default_title will be used instead.
454 * @global string $post_default_title Default XML-RPC post title.
456 * @param string $content XMLRPC XML Request content
457 * @return string Post title
459 function xmlrpc_getposttitle( $content ) {
460 global $post_default_title;
461 if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {
462 $post_title = $matchtitle[1];
464 $post_title = $post_default_title;
470 * Retrieve the post category or categories from XMLRPC XML.
472 * If the category element is not found, then the default post category will be
473 * used. The return type then would be what $post_default_category. If the
474 * category is found, then it will always be an array.
478 * @global string $post_default_category Default XML-RPC post category.
480 * @param string $content XMLRPC XML Request content
481 * @return string|array List of categories or category name.
483 function xmlrpc_getpostcategory( $content ) {
484 global $post_default_category;
485 if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {
486 $post_category = trim( $matchcat[1], ',' );
487 $post_category = explode( ',', $post_category );
489 $post_category = $post_default_category;
491 return $post_category;
495 * XMLRPC XML content without title and category elements.
499 * @param string $content XML-RPC XML Request content.
500 * @return string XMLRPC XML Request content without title and category elements.
502 function xmlrpc_removepostdata( $content ) {
503 $content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );
504 $content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );
505 $content = trim( $content );
510 * Use RegEx to extract URLs from arbitrary content.
514 * @param string $content Content to extract URLs from.
515 * @return array URLs found in passed string.
517 function wp_extract_urls( $content ) {
520 . "(?:([\w-]+:)?//?)"
526 . "[^`!()\[\]{};:'\".,<>«»“”‘’\s]|"
535 $post_links = array_unique( array_map( 'html_entity_decode', $post_links[2] ) );
537 return array_values( $post_links );
541 * Check content for video and audio links to add as enclosures.
543 * Will not add enclosures that have already been added and will
544 * remove enclosures that are no longer in the post. This is called as
545 * pingbacks and trackbacks.
549 * @global wpdb $wpdb WordPress database abstraction object.
551 * @param string $content Post Content.
552 * @param int $post_ID Post ID.
554 function do_enclose( $content, $post_ID ) {
557 //TODO: Tidy this ghetto code up and make the debug code optional
558 include_once( ABSPATH . WPINC . '/class-IXR.php' );
560 $post_links = array();
562 $pung = get_enclosed( $post_ID );
564 $post_links_temp = wp_extract_urls( $content );
566 foreach ( $pung as $link_test ) {
567 if ( ! in_array( $link_test, $post_links_temp ) ) { // link no longer in post
568 $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, $wpdb->esc_like( $link_test ) . '%') );
569 foreach ( $mids as $mid )
570 delete_metadata_by_mid( 'post', $mid );
574 foreach ( (array) $post_links_temp as $link_test ) {
575 if ( !in_array( $link_test, $pung ) ) { // If we haven't pung it already
576 $test = @parse_url( $link_test );
577 if ( false === $test )
579 if ( isset( $test['query'] ) )
580 $post_links[] = $link_test;
581 elseif ( isset($test['path']) && ( $test['path'] != '/' ) && ($test['path'] != '' ) )
582 $post_links[] = $link_test;
587 * Filters the list of enclosure links before querying the database.
589 * Allows for the addition and/or removal of potential enclosures to save
590 * to postmeta before checking the database for existing enclosures.
594 * @param array $post_links An array of enclosure links.
595 * @param int $post_ID Post ID.
597 $post_links = apply_filters( 'enclosure_links', $post_links, $post_ID );
599 foreach ( (array) $post_links as $url ) {
600 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, $wpdb->esc_like( $url ) . '%' ) ) ) {
602 if ( $headers = wp_get_http_headers( $url) ) {
603 $len = isset( $headers['content-length'] ) ? (int) $headers['content-length'] : 0;
604 $type = isset( $headers['content-type'] ) ? $headers['content-type'] : '';
605 $allowed_types = array( 'video', 'audio' );
607 // Check to see if we can figure out the mime type from
609 $url_parts = @parse_url( $url );
610 if ( false !== $url_parts ) {
611 $extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );
612 if ( !empty( $extension ) ) {
613 foreach ( wp_get_mime_types() as $exts => $mime ) {
614 if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
622 if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {
623 add_post_meta( $post_ID, 'enclosure', "$url\n$len\n$mime\n" );
631 * Retrieve HTTP Headers from URL.
635 * @param string $url URL to retrieve HTTP headers from.
636 * @param bool $deprecated Not Used.
637 * @return bool|string False on failure, headers on success.
639 function wp_get_http_headers( $url, $deprecated = false ) {
640 if ( !empty( $deprecated ) )
641 _deprecated_argument( __FUNCTION__, '2.7.0' );
643 $response = wp_safe_remote_head( $url );
645 if ( is_wp_error( $response ) )
648 return wp_remote_retrieve_headers( $response );
652 * Whether the publish date of the current post in the loop is different from the
653 * publish date of the previous post in the loop.
657 * @global string $currentday The day of the current post in the loop.
658 * @global string $previousday The day of the previous post in the loop.
660 * @return int 1 when new day, 0 if not a new day.
662 function is_new_day() {
663 global $currentday, $previousday;
664 if ( $currentday != $previousday )
671 * Build URL query based on an associative and, or indexed array.
673 * This is a convenient function for easily building url queries. It sets the
674 * separator to '&' and uses _http_build_query() function.
678 * @see _http_build_query() Used to build the query
679 * @link https://secure.php.net/manual/en/function.http-build-query.php for more on what
680 * http_build_query() does.
682 * @param array $data URL-encode key/value pairs.
683 * @return string URL-encoded string.
685 function build_query( $data ) {
686 return _http_build_query( $data, null, '&', '', false );
690 * From php.net (modified by Mark Jaquith to behave like the native PHP5 function).
695 * @see https://secure.php.net/manual/en/function.http-build-query.php
697 * @param array|object $data An array or object of data. Converted to array.
698 * @param string $prefix Optional. Numeric index. If set, start parameter numbering with it.
700 * @param string $sep Optional. Argument separator; defaults to 'arg_separator.output'.
702 * @param string $key Optional. Used to prefix key name. Default empty.
703 * @param bool $urlencode Optional. Whether to use urlencode() in the result. Default true.
705 * @return string The query string.
707 function _http_build_query( $data, $prefix = null, $sep = null, $key = '', $urlencode = true ) {
710 foreach ( (array) $data as $k => $v ) {
713 if ( is_int($k) && $prefix != null )
716 $k = $key . '%5B' . $k . '%5D';
719 elseif ( $v === false )
722 if ( is_array($v) || is_object($v) )
723 array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
724 elseif ( $urlencode )
725 array_push($ret, $k.'='.urlencode($v));
727 array_push($ret, $k.'='.$v);
731 $sep = ini_get('arg_separator.output');
733 return implode($sep, $ret);
737 * Retrieves a modified URL query string.
739 * You can rebuild the URL and append query variables to the URL query by using this function.
740 * There are two ways to use this function; either a single key and value, or an associative array.
742 * Using a single key and value:
744 * add_query_arg( 'key', 'value', 'http://example.com' );
746 * Using an associative array:
748 * add_query_arg( array(
749 * 'key1' => 'value1',
750 * 'key2' => 'value2',
751 * ), 'http://example.com' );
753 * Omitting the URL from either use results in the current URL being used
754 * (the value of `$_SERVER['REQUEST_URI']`).
756 * Values are expected to be encoded appropriately with urlencode() or rawurlencode().
758 * Setting any query variable's value to boolean false removes the key (see remove_query_arg()).
760 * Important: The return value of add_query_arg() is not escaped by default. Output should be
761 * late-escaped with esc_url() or similar to help prevent vulnerability to cross-site scripting
766 * @param string|array $key Either a query variable key, or an associative array of query variables.
767 * @param string $value Optional. Either a query variable value, or a URL to act upon.
768 * @param string $url Optional. A URL to act upon.
769 * @return string New URL query string (unescaped).
771 function add_query_arg() {
772 $args = func_get_args();
773 if ( is_array( $args[0] ) ) {
774 if ( count( $args ) < 2 || false === $args[1] )
775 $uri = $_SERVER['REQUEST_URI'];
779 if ( count( $args ) < 3 || false === $args[2] )
780 $uri = $_SERVER['REQUEST_URI'];
785 if ( $frag = strstr( $uri, '#' ) )
786 $uri = substr( $uri, 0, -strlen( $frag ) );
790 if ( 0 === stripos( $uri, 'http://' ) ) {
791 $protocol = 'http://';
792 $uri = substr( $uri, 7 );
793 } elseif ( 0 === stripos( $uri, 'https://' ) ) {
794 $protocol = 'https://';
795 $uri = substr( $uri, 8 );
800 if ( strpos( $uri, '?' ) !== false ) {
801 list( $base, $query ) = explode( '?', $uri, 2 );
803 } elseif ( $protocol || strpos( $uri, '=' ) === false ) {
811 wp_parse_str( $query, $qs );
812 $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
813 if ( is_array( $args[0] ) ) {
814 foreach ( $args[0] as $k => $v ) {
818 $qs[ $args[0] ] = $args[1];
821 foreach ( $qs as $k => $v ) {
826 $ret = build_query( $qs );
827 $ret = trim( $ret, '?' );
828 $ret = preg_replace( '#=(&|$)#', '$1', $ret );
829 $ret = $protocol . $base . $ret . $frag;
830 $ret = rtrim( $ret, '?' );
835 * Removes an item or items from a query string.
839 * @param string|array $key Query key or keys to remove.
840 * @param bool|string $query Optional. When false uses the current URL. Default false.
841 * @return string New URL query string.
843 function remove_query_arg( $key, $query = false ) {
844 if ( is_array( $key ) ) { // removing multiple keys
845 foreach ( $key as $k )
846 $query = add_query_arg( $k, false, $query );
849 return add_query_arg( $key, false, $query );
853 * Returns an array of single-use query variable names that can be removed from a URL.
857 * @return array An array of parameters to remove from the URL.
859 function wp_removable_query_args() {
860 $removable_query_args = array(
869 'hotkeys_highlight_first',
870 'hotkeys_highlight_last',
883 'wp-post-new-reload',
887 * Filters the list of query variables to remove.
891 * @param array $removable_query_args An array of query variables to remove from a URL.
893 return apply_filters( 'removable_query_args', $removable_query_args );
897 * Walks the array while sanitizing the contents.
901 * @param array $array Array to walk while sanitizing contents.
902 * @return array Sanitized $array.
904 function add_magic_quotes( $array ) {
905 foreach ( (array) $array as $k => $v ) {
906 if ( is_array( $v ) ) {
907 $array[$k] = add_magic_quotes( $v );
909 $array[$k] = addslashes( $v );
916 * HTTP request for URI to retrieve content.
920 * @see wp_safe_remote_get()
922 * @param string $uri URI/URL of web page to retrieve.
923 * @return false|string HTTP content. False on failure.
925 function wp_remote_fopen( $uri ) {
926 $parsed_url = @parse_url( $uri );
928 if ( !$parsed_url || !is_array( $parsed_url ) )
932 $options['timeout'] = 10;
934 $response = wp_safe_remote_get( $uri, $options );
936 if ( is_wp_error( $response ) )
939 return wp_remote_retrieve_body( $response );
943 * Set up the WordPress query.
947 * @global WP $wp_locale
948 * @global WP_Query $wp_query
949 * @global WP_Query $wp_the_query
951 * @param string|array $query_vars Default WP_Query arguments.
953 function wp( $query_vars = '' ) {
954 global $wp, $wp_query, $wp_the_query;
955 $wp->main( $query_vars );
957 if ( !isset($wp_the_query) )
958 $wp_the_query = $wp_query;
962 * Retrieve the description for the HTTP status.
966 * @global array $wp_header_to_desc
968 * @param int $code HTTP status code.
969 * @return string Empty string if not found, or description if found.
971 function get_status_header_desc( $code ) {
972 global $wp_header_to_desc;
974 $code = absint( $code );
976 if ( !isset( $wp_header_to_desc ) ) {
977 $wp_header_to_desc = array(
979 101 => 'Switching Protocols',
985 203 => 'Non-Authoritative Information',
987 205 => 'Reset Content',
988 206 => 'Partial Content',
989 207 => 'Multi-Status',
992 300 => 'Multiple Choices',
993 301 => 'Moved Permanently',
996 304 => 'Not Modified',
999 307 => 'Temporary Redirect',
1000 308 => 'Permanent Redirect',
1002 400 => 'Bad Request',
1003 401 => 'Unauthorized',
1004 402 => 'Payment Required',
1007 405 => 'Method Not Allowed',
1008 406 => 'Not Acceptable',
1009 407 => 'Proxy Authentication Required',
1010 408 => 'Request Timeout',
1013 411 => 'Length Required',
1014 412 => 'Precondition Failed',
1015 413 => 'Request Entity Too Large',
1016 414 => 'Request-URI Too Long',
1017 415 => 'Unsupported Media Type',
1018 416 => 'Requested Range Not Satisfiable',
1019 417 => 'Expectation Failed',
1020 418 => 'I\'m a teapot',
1021 421 => 'Misdirected Request',
1022 422 => 'Unprocessable Entity',
1024 424 => 'Failed Dependency',
1025 426 => 'Upgrade Required',
1026 428 => 'Precondition Required',
1027 429 => 'Too Many Requests',
1028 431 => 'Request Header Fields Too Large',
1029 451 => 'Unavailable For Legal Reasons',
1031 500 => 'Internal Server Error',
1032 501 => 'Not Implemented',
1033 502 => 'Bad Gateway',
1034 503 => 'Service Unavailable',
1035 504 => 'Gateway Timeout',
1036 505 => 'HTTP Version Not Supported',
1037 506 => 'Variant Also Negotiates',
1038 507 => 'Insufficient Storage',
1039 510 => 'Not Extended',
1040 511 => 'Network Authentication Required',
1044 if ( isset( $wp_header_to_desc[$code] ) )
1045 return $wp_header_to_desc[$code];
1051 * Set HTTP status header.
1054 * @since 4.4.0 Added the `$description` parameter.
1056 * @see get_status_header_desc()
1058 * @param int $code HTTP status code.
1059 * @param string $description Optional. A custom description for the HTTP status.
1061 function status_header( $code, $description = '' ) {
1062 if ( ! $description ) {
1063 $description = get_status_header_desc( $code );
1066 if ( empty( $description ) ) {
1070 $protocol = wp_get_server_protocol();
1071 $status_header = "$protocol $code $description";
1072 if ( function_exists( 'apply_filters' ) )
1075 * Filters an HTTP status header.
1079 * @param string $status_header HTTP status header.
1080 * @param int $code HTTP status code.
1081 * @param string $description Description for the status code.
1082 * @param string $protocol Server protocol.
1084 $status_header = apply_filters( 'status_header', $status_header, $code, $description, $protocol );
1086 @header( $status_header, true, $code );
1090 * Get the header information to prevent caching.
1092 * The several different headers cover the different ways cache prevention
1093 * is handled by different browsers
1097 * @return array The associative array of header names and field values.
1099 function wp_get_nocache_headers() {
1101 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
1102 'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
1105 if ( function_exists('apply_filters') ) {
1107 * Filters the cache-controlling headers.
1111 * @see wp_get_nocache_headers()
1113 * @param array $headers {
1114 * Header names and field values.
1116 * @type string $Expires Expires header.
1117 * @type string $Cache-Control Cache-Control header.
1120 $headers = (array) apply_filters( 'nocache_headers', $headers );
1122 $headers['Last-Modified'] = false;
1127 * Set the headers to prevent caching for the different browsers.
1129 * Different browsers support different nocache headers, so several
1130 * headers must be sent so that all of them get the point that no
1131 * caching should occur.
1135 * @see wp_get_nocache_headers()
1137 function nocache_headers() {
1138 $headers = wp_get_nocache_headers();
1140 unset( $headers['Last-Modified'] );
1142 // In PHP 5.3+, make sure we are not sending a Last-Modified header.
1143 if ( function_exists( 'header_remove' ) ) {
1144 @header_remove( 'Last-Modified' );
1146 // In PHP 5.2, send an empty Last-Modified header, but only as a
1147 // last resort to override a header already sent. #WP23021
1148 foreach ( headers_list() as $header ) {
1149 if ( 0 === stripos( $header, 'Last-Modified' ) ) {
1150 $headers['Last-Modified'] = '';
1156 foreach ( $headers as $name => $field_value )
1157 @header("{$name}: {$field_value}");
1161 * Set the headers for caching for 10 days with JavaScript content type.
1165 function cache_javascript_headers() {
1166 $expiresOffset = 10 * DAY_IN_SECONDS;
1168 header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );
1169 header( "Vary: Accept-Encoding" ); // Handle proxies
1170 header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
1174 * Retrieve the number of database queries during the WordPress execution.
1178 * @global wpdb $wpdb WordPress database abstraction object.
1180 * @return int Number of database queries.
1182 function get_num_queries() {
1184 return $wpdb->num_queries;
1188 * Whether input is yes or no.
1190 * Must be 'y' to be true.
1194 * @param string $yn Character string containing either 'y' (yes) or 'n' (no).
1195 * @return bool True if yes, false on anything else.
1197 function bool_from_yn( $yn ) {
1198 return ( strtolower( $yn ) == 'y' );
1202 * Load the feed template from the use of an action hook.
1204 * If the feed action does not have a hook, then the function will die with a
1205 * message telling the visitor that the feed is not valid.
1207 * It is better to only have one hook for each feed.
1211 * @global WP_Query $wp_query Used to tell if the use a comment feed.
1213 function do_feed() {
1216 // Determine if we are looking at the main comment feed
1217 $is_main_comments_feed = ( $wp_query->is_comment_feed() && ! $wp_query->is_singular() );
1220 * Check the queried object for the existence of posts if it is not a feed for an archive,
1221 * search result, or main comments. By checking for the absense of posts we can prevent rendering the feed
1222 * templates at invalid endpoints. e.g.) /wp-content/plugins/feed/
1224 if ( ! $wp_query->have_posts() && ! ( $wp_query->is_archive() || $wp_query->is_search() || $is_main_comments_feed ) ) {
1225 wp_die( __( 'ERROR: This is not a valid feed.' ), '', array( 'response' => 404 ) );
1228 $feed = get_query_var( 'feed' );
1230 // Remove the pad, if present.
1231 $feed = preg_replace( '/^_+/', '', $feed );
1233 if ( $feed == '' || $feed == 'feed' )
1234 $feed = get_default_feed();
1236 if ( ! has_action( "do_feed_{$feed}" ) ) {
1237 wp_die( __( 'ERROR: This is not a valid feed template.' ), '', array( 'response' => 404 ) );
1241 * Fires once the given feed is loaded.
1243 * The dynamic portion of the hook name, `$feed`, refers to the feed template name.
1244 * Possible values include: 'rdf', 'rss', 'rss2', and 'atom'.
1247 * @since 4.4.0 The `$feed` parameter was added.
1249 * @param bool $is_comment_feed Whether the feed is a comment feed.
1250 * @param string $feed The feed name.
1252 do_action( "do_feed_{$feed}", $wp_query->is_comment_feed, $feed );
1256 * Load the RDF RSS 0.91 Feed template.
1260 * @see load_template()
1262 function do_feed_rdf() {
1263 load_template( ABSPATH . WPINC . '/feed-rdf.php' );
1267 * Load the RSS 1.0 Feed Template.
1271 * @see load_template()
1273 function do_feed_rss() {
1274 load_template( ABSPATH . WPINC . '/feed-rss.php' );
1278 * Load either the RSS2 comment feed or the RSS2 posts feed.
1282 * @see load_template()
1284 * @param bool $for_comments True for the comment feed, false for normal feed.
1286 function do_feed_rss2( $for_comments ) {
1287 if ( $for_comments )
1288 load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );
1290 load_template( ABSPATH . WPINC . '/feed-rss2.php' );
1294 * Load either Atom comment feed or Atom posts feed.
1298 * @see load_template()
1300 * @param bool $for_comments True for the comment feed, false for normal feed.
1302 function do_feed_atom( $for_comments ) {
1304 load_template( ABSPATH . WPINC . '/feed-atom-comments.php');
1306 load_template( ABSPATH . WPINC . '/feed-atom.php' );
1310 * Display the robots.txt file content.
1312 * The echo content should be with usage of the permalinks or for creating the
1317 function do_robots() {
1318 header( 'Content-Type: text/plain; charset=utf-8' );
1321 * Fires when displaying the robots.txt file.
1325 do_action( 'do_robotstxt' );
1327 $output = "User-agent: *\n";
1328 $public = get_option( 'blog_public' );
1329 if ( '0' == $public ) {
1330 $output .= "Disallow: /\n";
1332 $site_url = parse_url( site_url() );
1333 $path = ( !empty( $site_url['path'] ) ) ? $site_url['path'] : '';
1334 $output .= "Disallow: $path/wp-admin/\n";
1335 $output .= "Allow: $path/wp-admin/admin-ajax.php\n";
1339 * Filters the robots.txt output.
1343 * @param string $output Robots.txt output.
1344 * @param bool $public Whether the site is considered "public".
1346 echo apply_filters( 'robots_txt', $output, $public );
1350 * Test whether WordPress is already installed.
1352 * The cache will be checked first. If you have a cache plugin, which saves
1353 * the cache values, then this will work. If you use the default WordPress
1354 * cache, and the database goes away, then you might have problems.
1356 * Checks for the 'siteurl' option for whether WordPress is installed.
1360 * @global wpdb $wpdb WordPress database abstraction object.
1362 * @return bool Whether the site is already installed.
1364 function is_blog_installed() {
1368 * Check cache first. If options table goes away and we have true
1371 if ( wp_cache_get( 'is_blog_installed' ) )
1374 $suppress = $wpdb->suppress_errors();
1375 if ( ! wp_installing() ) {
1376 $alloptions = wp_load_alloptions();
1378 // If siteurl is not set to autoload, check it specifically
1379 if ( !isset( $alloptions['siteurl'] ) )
1380 $installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
1382 $installed = $alloptions['siteurl'];
1383 $wpdb->suppress_errors( $suppress );
1385 $installed = !empty( $installed );
1386 wp_cache_set( 'is_blog_installed', $installed );
1391 // If visiting repair.php, return true and let it take over.
1392 if ( defined( 'WP_REPAIRING' ) )
1395 $suppress = $wpdb->suppress_errors();
1398 * Loop over the WP tables. If none exist, then scratch install is allowed.
1399 * If one or more exist, suggest table repair since we got here because the
1400 * options table could not be accessed.
1402 $wp_tables = $wpdb->tables();
1403 foreach ( $wp_tables as $table ) {
1404 // The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
1405 if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
1407 if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
1410 if ( ! $wpdb->get_results( "DESCRIBE $table;" ) )
1413 // One or more tables exist. We are insane.
1415 wp_load_translations_early();
1417 // Die with a DB error.
1418 $wpdb->error = sprintf(
1419 /* translators: %s: database repair URL */
1420 __( 'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.' ),
1421 'maint/repair.php?referrer=is_blog_installed'
1427 $wpdb->suppress_errors( $suppress );
1429 wp_cache_set( 'is_blog_installed', false );
1435 * Retrieve URL with nonce added to URL query.
1439 * @param string $actionurl URL to add nonce action.
1440 * @param int|string $action Optional. Nonce action name. Default -1.
1441 * @param string $name Optional. Nonce name. Default '_wpnonce'.
1442 * @return string Escaped URL with nonce action added.
1444 function wp_nonce_url( $actionurl, $action = -1, $name = '_wpnonce' ) {
1445 $actionurl = str_replace( '&', '&', $actionurl );
1446 return esc_html( add_query_arg( $name, wp_create_nonce( $action ), $actionurl ) );
1450 * Retrieve or display nonce hidden field for forms.
1452 * The nonce field is used to validate that the contents of the form came from
1453 * the location on the current site and not somewhere else. The nonce does not
1454 * offer absolute protection, but should protect against most cases. It is very
1455 * important to use nonce field in forms.
1457 * The $action and $name are optional, but if you want to have better security,
1458 * it is strongly suggested to set those two parameters. It is easier to just
1459 * call the function without any parameters, because validation of the nonce
1460 * doesn't require any parameters, but since crackers know what the default is
1461 * it won't be difficult for them to find a way around your nonce and cause
1464 * The input name will be whatever $name value you gave. The input value will be
1465 * the nonce creation value.
1469 * @param int|string $action Optional. Action name. Default -1.
1470 * @param string $name Optional. Nonce name. Default '_wpnonce'.
1471 * @param bool $referer Optional. Whether to set the referer field for validation. Default true.
1472 * @param bool $echo Optional. Whether to display or return hidden form field. Default true.
1473 * @return string Nonce field HTML markup.
1475 function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
1476 $name = esc_attr( $name );
1477 $nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
1480 $nonce_field .= wp_referer_field( false );
1485 return $nonce_field;
1489 * Retrieve or display referer hidden field for forms.
1491 * The referer link is the current Request URI from the server super global. The
1492 * input name is '_wp_http_referer', in case you wanted to check manually.
1496 * @param bool $echo Optional. Whether to echo or return the referer field. Default true.
1497 * @return string Referer field HTML markup.
1499 function wp_referer_field( $echo = true ) {
1500 $referer_field = '<input type="hidden" name="_wp_http_referer" value="'. esc_attr( wp_unslash( $_SERVER['REQUEST_URI'] ) ) . '" />';
1503 echo $referer_field;
1504 return $referer_field;
1508 * Retrieve or display original referer hidden field for forms.
1510 * The input name is '_wp_original_http_referer' and will be either the same
1511 * value of wp_referer_field(), if that was posted already or it will be the
1512 * current page, if it doesn't exist.
1516 * @param bool $echo Optional. Whether to echo the original http referer. Default true.
1517 * @param string $jump_back_to Optional. Can be 'previous' or page you want to jump back to.
1518 * Default 'current'.
1519 * @return string Original referer field.
1521 function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {
1522 if ( ! $ref = wp_get_original_referer() ) {
1523 $ref = 'previous' == $jump_back_to ? wp_get_referer() : wp_unslash( $_SERVER['REQUEST_URI'] );
1525 $orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( $ref ) . '" />';
1527 echo $orig_referer_field;
1528 return $orig_referer_field;
1532 * Retrieve referer from '_wp_http_referer' or HTTP referer.
1534 * If it's the same as the current request URL, will return false.
1538 * @return false|string False on failure. Referer URL on success.
1540 function wp_get_referer() {
1541 if ( ! function_exists( 'wp_validate_redirect' ) ) {
1545 $ref = wp_get_raw_referer();
1547 if ( $ref && $ref !== wp_unslash( $_SERVER['REQUEST_URI'] ) && $ref !== home_url() . wp_unslash( $_SERVER['REQUEST_URI'] ) ) {
1548 return wp_validate_redirect( $ref, false );
1555 * Retrieves unvalidated referer from '_wp_http_referer' or HTTP referer.
1557 * Do not use for redirects, use wp_get_referer() instead.
1561 * @return string|false Referer URL on success, false on failure.
1563 function wp_get_raw_referer() {
1564 if ( ! empty( $_REQUEST['_wp_http_referer'] ) ) {
1565 return wp_unslash( $_REQUEST['_wp_http_referer'] );
1566 } else if ( ! empty( $_SERVER['HTTP_REFERER'] ) ) {
1567 return wp_unslash( $_SERVER['HTTP_REFERER'] );
1574 * Retrieve original referer that was posted, if it exists.
1578 * @return string|false False if no original referer or original referer if set.
1580 function wp_get_original_referer() {
1581 if ( ! empty( $_REQUEST['_wp_original_http_referer'] ) && function_exists( 'wp_validate_redirect' ) )
1582 return wp_validate_redirect( wp_unslash( $_REQUEST['_wp_original_http_referer'] ), false );
1587 * Recursive directory creation based on full path.
1589 * Will attempt to set permissions on folders.
1593 * @param string $target Full path to attempt to create.
1594 * @return bool Whether the path was created. True if path already exists.
1596 function wp_mkdir_p( $target ) {
1599 // Strip the protocol.
1600 if ( wp_is_stream( $target ) ) {
1601 list( $wrapper, $target ) = explode( '://', $target, 2 );
1604 // From php.net/mkdir user contributed notes.
1605 $target = str_replace( '//', '/', $target );
1607 // Put the wrapper back on the target.
1608 if ( $wrapper !== null ) {
1609 $target = $wrapper . '://' . $target;
1613 * Safe mode fails with a trailing slash under certain PHP versions.
1614 * Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
1616 $target = rtrim($target, '/');
1617 if ( empty($target) )
1620 if ( file_exists( $target ) )
1621 return @is_dir( $target );
1623 // We need to find the permissions of the parent folder that exists and inherit that.
1624 $target_parent = dirname( $target );
1625 while ( '.' != $target_parent && ! is_dir( $target_parent ) ) {
1626 $target_parent = dirname( $target_parent );
1629 // Get the permission bits.
1630 if ( $stat = @stat( $target_parent ) ) {
1631 $dir_perms = $stat['mode'] & 0007777;
1636 if ( @mkdir( $target, $dir_perms, true ) ) {
1639 * If a umask is set that modifies $dir_perms, we'll have to re-set
1640 * the $dir_perms correctly with chmod()
1642 if ( $dir_perms != ( $dir_perms & ~umask() ) ) {
1643 $folder_parts = explode( '/', substr( $target, strlen( $target_parent ) + 1 ) );
1644 for ( $i = 1, $c = count( $folder_parts ); $i <= $c; $i++ ) {
1645 @chmod( $target_parent . '/' . implode( '/', array_slice( $folder_parts, 0, $i ) ), $dir_perms );
1656 * Test if a give filesystem path is absolute.
1658 * For example, '/foo/bar', or 'c:\windows'.
1662 * @param string $path File path.
1663 * @return bool True if path is absolute, false is not absolute.
1665 function path_is_absolute( $path ) {
1667 * This is definitive if true but fails if $path does not exist or contains
1670 if ( realpath($path) == $path )
1673 if ( strlen($path) == 0 || $path[0] == '.' )
1676 // Windows allows absolute paths like this.
1677 if ( preg_match('#^[a-zA-Z]:\\\\#', $path) )
1680 // A path starting with / or \ is absolute; anything else is relative.
1681 return ( $path[0] == '/' || $path[0] == '\\' );
1685 * Join two filesystem paths together.
1687 * For example, 'give me $path relative to $base'. If the $path is absolute,
1688 * then it the full path is returned.
1692 * @param string $base Base path.
1693 * @param string $path Path relative to $base.
1694 * @return string The path with the base or absolute path.
1696 function path_join( $base, $path ) {
1697 if ( path_is_absolute($path) )
1700 return rtrim($base, '/') . '/' . ltrim($path, '/');
1704 * Normalize a filesystem path.
1706 * On windows systems, replaces backslashes with forward slashes
1707 * and forces upper-case drive letters.
1708 * Allows for two leading slashes for Windows network shares, but
1709 * ensures that all other duplicate slashes are reduced to a single.
1712 * @since 4.4.0 Ensures upper-case drive letters on Windows systems.
1713 * @since 4.5.0 Allows for Windows network shares.
1715 * @param string $path Path to normalize.
1716 * @return string Normalized path.
1718 function wp_normalize_path( $path ) {
1719 $path = str_replace( '\\', '/', $path );
1720 $path = preg_replace( '|(?<=.)/+|', '/', $path );
1721 if ( ':' === substr( $path, 1, 1 ) ) {
1722 $path = ucfirst( $path );
1728 * Determine a writable directory for temporary files.
1730 * Function's preference is the return value of sys_get_temp_dir(),
1731 * followed by your PHP temporary upload directory, followed by WP_CONTENT_DIR,
1732 * before finally defaulting to /tmp/
1734 * In the event that this function does not find a writable location,
1735 * It may be overridden by the WP_TEMP_DIR constant in your wp-config.php file.
1739 * @staticvar string $temp
1741 * @return string Writable temporary directory.
1743 function get_temp_dir() {
1745 if ( defined('WP_TEMP_DIR') )
1746 return trailingslashit(WP_TEMP_DIR);
1749 return trailingslashit( $temp );
1751 if ( function_exists('sys_get_temp_dir') ) {
1752 $temp = sys_get_temp_dir();
1753 if ( @is_dir( $temp ) && wp_is_writable( $temp ) )
1754 return trailingslashit( $temp );
1757 $temp = ini_get('upload_tmp_dir');
1758 if ( @is_dir( $temp ) && wp_is_writable( $temp ) )
1759 return trailingslashit( $temp );
1761 $temp = WP_CONTENT_DIR . '/';
1762 if ( is_dir( $temp ) && wp_is_writable( $temp ) )
1769 * Determine if a directory is writable.
1771 * This function is used to work around certain ACL issues in PHP primarily
1772 * affecting Windows Servers.
1776 * @see win_is_writable()
1778 * @param string $path Path to check for write-ability.
1779 * @return bool Whether the path is writable.
1781 function wp_is_writable( $path ) {
1782 if ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) )
1783 return win_is_writable( $path );
1785 return @is_writable( $path );
1789 * Workaround for Windows bug in is_writable() function
1791 * PHP has issues with Windows ACL's for determine if a
1792 * directory is writable or not, this works around them by
1793 * checking the ability to open files rather than relying
1794 * upon PHP to interprate the OS ACL.
1798 * @see https://bugs.php.net/bug.php?id=27609
1799 * @see https://bugs.php.net/bug.php?id=30931
1801 * @param string $path Windows path to check for write-ability.
1802 * @return bool Whether the path is writable.
1804 function win_is_writable( $path ) {
1806 if ( $path[strlen( $path ) - 1] == '/' ) { // if it looks like a directory, check a random file within the directory
1807 return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp');
1808 } elseif ( is_dir( $path ) ) { // If it's a directory (and not a file) check a random file within the directory
1809 return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );
1811 // check tmp file for read/write capabilities
1812 $should_delete_tmp_file = !file_exists( $path );
1813 $f = @fopen( $path, 'a' );
1817 if ( $should_delete_tmp_file )
1823 * Retrieves uploads directory information.
1825 * Same as wp_upload_dir() but "light weight" as it doesn't attempt to create the uploads directory.
1826 * Intended for use in themes, when only 'basedir' and 'baseurl' are needed, generally in all cases
1827 * when not uploading files.
1831 * @see wp_upload_dir()
1833 * @return array See wp_upload_dir() for description.
1835 function wp_get_upload_dir() {
1836 return wp_upload_dir( null, false );
1840 * Get an array containing the current upload directory's path and url.
1842 * Checks the 'upload_path' option, which should be from the web root folder,
1843 * and if it isn't empty it will be used. If it is empty, then the path will be
1844 * 'WP_CONTENT_DIR/uploads'. If the 'UPLOADS' constant is defined, then it will
1845 * override the 'upload_path' option and 'WP_CONTENT_DIR/uploads' path.
1847 * The upload URL path is set either by the 'upload_url_path' option or by using
1848 * the 'WP_CONTENT_URL' constant and appending '/uploads' to the path.
1850 * If the 'uploads_use_yearmonth_folders' is set to true (checkbox if checked in
1851 * the administration settings panel), then the time will be used. The format
1852 * will be year first and then month.
1854 * If the path couldn't be created, then an error will be returned with the key
1855 * 'error' containing the error message. The error suggests that the parent
1856 * directory is not writable by the server.
1858 * On success, the returned array will have many indices:
1859 * 'path' - base directory and sub directory or full path to upload directory.
1860 * 'url' - base url and sub directory or absolute URL to upload directory.
1861 * 'subdir' - sub directory if uploads use year/month folders option is on.
1862 * 'basedir' - path without subdir.
1863 * 'baseurl' - URL path without subdir.
1864 * 'error' - false or error message.
1867 * @uses _wp_upload_dir()
1869 * @param string $time Optional. Time formatted in 'yyyy/mm'. Default null.
1870 * @param bool $create_dir Optional. Whether to check and create the uploads directory.
1871 * Default true for backward compatibility.
1872 * @param bool $refresh_cache Optional. Whether to refresh the cache. Default false.
1873 * @return array See above for description.
1875 function wp_upload_dir( $time = null, $create_dir = true, $refresh_cache = false ) {
1876 static $cache = array(), $tested_paths = array();
1878 $key = sprintf( '%d-%s', get_current_blog_id(), (string) $time );
1880 if ( $refresh_cache || empty( $cache[ $key ] ) ) {
1881 $cache[ $key ] = _wp_upload_dir( $time );
1885 * Filters the uploads directory data.
1889 * @param array $uploads Array of upload directory data with keys of 'path',
1890 * 'url', 'subdir, 'basedir', and 'error'.
1892 $uploads = apply_filters( 'upload_dir', $cache[ $key ] );
1894 if ( $create_dir ) {
1895 $path = $uploads['path'];
1897 if ( array_key_exists( $path, $tested_paths ) ) {
1898 $uploads['error'] = $tested_paths[ $path ];
1900 if ( ! wp_mkdir_p( $path ) ) {
1901 if ( 0 === strpos( $uploads['basedir'], ABSPATH ) ) {
1902 $error_path = str_replace( ABSPATH, '', $uploads['basedir'] ) . $uploads['subdir'];
1904 $error_path = basename( $uploads['basedir'] ) . $uploads['subdir'];
1907 $uploads['error'] = sprintf(
1908 /* translators: %s: directory path */
1909 __( 'Unable to create directory %s. Is its parent directory writable by the server?' ),
1910 esc_html( $error_path )
1914 $tested_paths[ $path ] = $uploads['error'];
1922 * A non-filtered, non-cached version of wp_upload_dir() that doesn't check the path.
1926 * @param string $time Optional. Time formatted in 'yyyy/mm'. Default null.
1927 * @return array See wp_upload_dir()
1929 function _wp_upload_dir( $time = null ) {
1930 $siteurl = get_option( 'siteurl' );
1931 $upload_path = trim( get_option( 'upload_path' ) );
1933 if ( empty( $upload_path ) || 'wp-content/uploads' == $upload_path ) {
1934 $dir = WP_CONTENT_DIR . '/uploads';
1935 } elseif ( 0 !== strpos( $upload_path, ABSPATH ) ) {
1936 // $dir is absolute, $upload_path is (maybe) relative to ABSPATH
1937 $dir = path_join( ABSPATH, $upload_path );
1939 $dir = $upload_path;
1942 if ( !$url = get_option( 'upload_url_path' ) ) {
1943 if ( empty($upload_path) || ( 'wp-content/uploads' == $upload_path ) || ( $upload_path == $dir ) )
1944 $url = WP_CONTENT_URL . '/uploads';
1946 $url = trailingslashit( $siteurl ) . $upload_path;
1950 * Honor the value of UPLOADS. This happens as long as ms-files rewriting is disabled.
1951 * We also sometimes obey UPLOADS when rewriting is enabled -- see the next block.
1953 if ( defined( 'UPLOADS' ) && ! ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) ) {
1954 $dir = ABSPATH . UPLOADS;
1955 $url = trailingslashit( $siteurl ) . UPLOADS;
1958 // If multisite (and if not the main site in a post-MU network)
1959 if ( is_multisite() && ! ( is_main_network() && is_main_site() && defined( 'MULTISITE' ) ) ) {
1961 if ( ! get_site_option( 'ms_files_rewriting' ) ) {
1963 * If ms-files rewriting is disabled (networks created post-3.5), it is fairly
1964 * straightforward: Append sites/%d if we're not on the main site (for post-MU
1965 * networks). (The extra directory prevents a four-digit ID from conflicting with
1966 * a year-based directory for the main site. But if a MU-era network has disabled
1967 * ms-files rewriting manually, they don't need the extra directory, as they never
1968 * had wp-content/uploads for the main site.)
1971 if ( defined( 'MULTISITE' ) )
1972 $ms_dir = '/sites/' . get_current_blog_id();
1974 $ms_dir = '/' . get_current_blog_id();
1979 } elseif ( defined( 'UPLOADS' ) && ! ms_is_switched() ) {
1981 * Handle the old-form ms-files.php rewriting if the network still has that enabled.
1982 * When ms-files rewriting is enabled, then we only listen to UPLOADS when:
1983 * 1) We are not on the main site in a post-MU network, as wp-content/uploads is used
1985 * 2) We are not switched, as ms_upload_constants() hardcodes these constants to reflect
1986 * the original blog ID.
1988 * Rather than UPLOADS, we actually use BLOGUPLOADDIR if it is set, as it is absolute.
1989 * (And it will be set, see ms_upload_constants().) Otherwise, UPLOADS can be used, as
1990 * as it is relative to ABSPATH. For the final piece: when UPLOADS is used with ms-files
1991 * rewriting in multisite, the resulting URL is /files. (#WP22702 for background.)
1994 if ( defined( 'BLOGUPLOADDIR' ) )
1995 $dir = untrailingslashit( BLOGUPLOADDIR );
1997 $dir = ABSPATH . UPLOADS;
1998 $url = trailingslashit( $siteurl ) . 'files';
2006 if ( get_option( 'uploads_use_yearmonth_folders' ) ) {
2007 // Generate the yearly and monthly dirs
2009 $time = current_time( 'mysql' );
2010 $y = substr( $time, 0, 4 );
2011 $m = substr( $time, 5, 2 );
2021 'subdir' => $subdir,
2022 'basedir' => $basedir,
2023 'baseurl' => $baseurl,
2029 * Get a filename that is sanitized and unique for the given directory.
2031 * If the filename is not unique, then a number will be added to the filename
2032 * before the extension, and will continue adding numbers until the filename is
2035 * The callback is passed three parameters, the first one is the directory, the
2036 * second is the filename, and the third is the extension.
2040 * @param string $dir Directory.
2041 * @param string $filename File name.
2042 * @param callable $unique_filename_callback Callback. Default null.
2043 * @return string New filename, if given wasn't unique.
2045 function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
2046 // Sanitize the file name before we begin processing.
2047 $filename = sanitize_file_name($filename);
2049 // Separate the filename into a name and extension.
2050 $ext = pathinfo( $filename, PATHINFO_EXTENSION );
2051 $name = pathinfo( $filename, PATHINFO_BASENAME );
2056 // Edge case: if file is named '.ext', treat as an empty name.
2057 if ( $name === $ext ) {
2062 * Increment the file number until we have a unique file to save in $dir.
2063 * Use callback if supplied.
2065 if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
2066 $filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
2070 // Change '.ext' to lower case.
2071 if ( $ext && strtolower($ext) != $ext ) {
2072 $ext2 = strtolower($ext);
2073 $filename2 = preg_replace( '|' . preg_quote($ext) . '$|', $ext2, $filename );
2075 // Check for both lower and upper case extension or image sub-sizes may be overwritten.
2076 while ( file_exists($dir . "/$filename") || file_exists($dir . "/$filename2") ) {
2077 $new_number = $number + 1;
2078 $filename = str_replace( array( "-$number$ext", "$number$ext" ), "-$new_number$ext", $filename );
2079 $filename2 = str_replace( array( "-$number$ext2", "$number$ext2" ), "-$new_number$ext2", $filename2 );
2080 $number = $new_number;
2084 * Filters the result when generating a unique file name.
2088 * @param string $filename Unique file name.
2089 * @param string $ext File extension, eg. ".png".
2090 * @param string $dir Directory path.
2091 * @param callable|null $unique_filename_callback Callback function that generates the unique file name.
2093 return apply_filters( 'wp_unique_filename', $filename2, $ext, $dir, $unique_filename_callback );
2096 while ( file_exists( $dir . "/$filename" ) ) {
2097 if ( '' == "$number$ext" ) {
2098 $filename = "$filename-" . ++$number;
2100 $filename = str_replace( array( "-$number$ext", "$number$ext" ), "-" . ++$number . $ext, $filename );
2105 /** This filter is documented in wp-includes/functions.php */
2106 return apply_filters( 'wp_unique_filename', $filename, $ext, $dir, $unique_filename_callback );
2110 * Create a file in the upload folder with given content.
2112 * If there is an error, then the key 'error' will exist with the error message.
2113 * If success, then the key 'file' will have the unique file path, the 'url' key
2114 * will have the link to the new file. and the 'error' key will be set to false.
2116 * This function will not move an uploaded file to the upload folder. It will
2117 * create a new file with the content in $bits parameter. If you move the upload
2118 * file, read the content of the uploaded file, and then you can give the
2119 * filename and content to this function, which will add it to the upload
2122 * The permissions will be set on the new file automatically by this function.
2126 * @param string $name Filename.
2127 * @param null|string $deprecated Never used. Set to null.
2128 * @param mixed $bits File content
2129 * @param string $time Optional. Time formatted in 'yyyy/mm'. Default null.
2132 function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
2133 if ( !empty( $deprecated ) )
2134 _deprecated_argument( __FUNCTION__, '2.0.0' );
2136 if ( empty( $name ) )
2137 return array( 'error' => __( 'Empty filename' ) );
2139 $wp_filetype = wp_check_filetype( $name );
2140 if ( ! $wp_filetype['ext'] && ! current_user_can( 'unfiltered_upload' ) )
2141 return array( 'error' => __( 'Invalid file type' ) );
2143 $upload = wp_upload_dir( $time );
2145 if ( $upload['error'] !== false )
2149 * Filters whether to treat the upload bits as an error.
2151 * Passing a non-array to the filter will effectively short-circuit preparing
2152 * the upload bits, returning that value instead.
2156 * @param mixed $upload_bits_error An array of upload bits data, or a non-array error to return.
2158 $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) );
2159 if ( !is_array( $upload_bits_error ) ) {
2160 $upload[ 'error' ] = $upload_bits_error;
2164 $filename = wp_unique_filename( $upload['path'], $name );
2166 $new_file = $upload['path'] . "/$filename";
2167 if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
2168 if ( 0 === strpos( $upload['basedir'], ABSPATH ) )
2169 $error_path = str_replace( ABSPATH, '', $upload['basedir'] ) . $upload['subdir'];
2171 $error_path = basename( $upload['basedir'] ) . $upload['subdir'];
2174 /* translators: %s: directory path */
2175 __( 'Unable to create directory %s. Is its parent directory writable by the server?' ),
2178 return array( 'error' => $message );
2181 $ifp = @ fopen( $new_file, 'wb' );
2183 return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) );
2185 @fwrite( $ifp, $bits );
2189 // Set correct file permissions
2190 $stat = @ stat( dirname( $new_file ) );
2191 $perms = $stat['mode'] & 0007777;
2192 $perms = $perms & 0000666;
2193 @ chmod( $new_file, $perms );
2197 $url = $upload['url'] . "/$filename";
2199 /** This filter is documented in wp-admin/includes/file.php */
2200 return apply_filters( 'wp_handle_upload', array( 'file' => $new_file, 'url' => $url, 'type' => $wp_filetype['type'], 'error' => false ), 'sideload' );
2204 * Retrieve the file type based on the extension name.
2208 * @param string $ext The extension to search.
2209 * @return string|void The file type, example: audio, video, document, spreadsheet, etc.
2211 function wp_ext2type( $ext ) {
2212 $ext = strtolower( $ext );
2214 $ext2type = wp_get_ext_types();
2215 foreach ( $ext2type as $type => $exts )
2216 if ( in_array( $ext, $exts ) )
2221 * Retrieve the file type from the file name.
2223 * You can optionally define the mime array, if needed.
2227 * @param string $filename File name or path.
2228 * @param array $mimes Optional. Key is the file extension with value as the mime type.
2229 * @return array Values with extension first and mime type.
2231 function wp_check_filetype( $filename, $mimes = null ) {
2232 if ( empty($mimes) )
2233 $mimes = get_allowed_mime_types();
2237 foreach ( $mimes as $ext_preg => $mime_match ) {
2238 $ext_preg = '!\.(' . $ext_preg . ')$!i';
2239 if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
2240 $type = $mime_match;
2241 $ext = $ext_matches[1];
2246 return compact( 'ext', 'type' );
2250 * Attempt to determine the real file type of a file.
2252 * If unable to, the file name extension will be used to determine type.
2254 * If it's determined that the extension does not match the file's real type,
2255 * then the "proper_filename" value will be set with a proper filename and extension.
2257 * Currently this function only supports validating images known to getimagesize().
2261 * @param string $file Full path to the file.
2262 * @param string $filename The name of the file (may differ from $file due to $file being
2263 * in a tmp directory).
2264 * @param array $mimes Optional. Key is the file extension with value as the mime type.
2265 * @return array Values for the extension, MIME, and either a corrected filename or false
2266 * if original $filename is valid.
2268 function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
2269 $proper_filename = false;
2271 // Do basic extension validation and MIME mapping
2272 $wp_filetype = wp_check_filetype( $filename, $mimes );
2273 $ext = $wp_filetype['ext'];
2274 $type = $wp_filetype['type'];
2276 // We can't do any further validation without a file to work with
2277 if ( ! file_exists( $file ) ) {
2278 return compact( 'ext', 'type', 'proper_filename' );
2281 // We're able to validate images using GD
2282 if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
2284 // Attempt to figure out what type of image it actually is
2285 $imgstats = @getimagesize( $file );
2287 // If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
2288 if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
2290 * Filters the list mapping image mime types to their respective extensions.
2294 * @param array $mime_to_ext Array of image mime types and their matching extensions.
2296 $mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(
2297 'image/jpeg' => 'jpg',
2298 'image/png' => 'png',
2299 'image/gif' => 'gif',
2300 'image/bmp' => 'bmp',
2301 'image/tiff' => 'tif',
2304 // Replace whatever is after the last period in the filename with the correct extension
2305 if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
2306 $filename_parts = explode( '.', $filename );
2307 array_pop( $filename_parts );
2308 $filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
2309 $new_filename = implode( '.', $filename_parts );
2311 if ( $new_filename != $filename ) {
2312 $proper_filename = $new_filename; // Mark that it changed
2314 // Redefine the extension / MIME
2315 $wp_filetype = wp_check_filetype( $new_filename, $mimes );
2316 $ext = $wp_filetype['ext'];
2317 $type = $wp_filetype['type'];
2323 * Filters the "real" file type of the given file.
2327 * @param array $wp_check_filetype_and_ext File data array containing 'ext', 'type', and
2328 * 'proper_filename' keys.
2329 * @param string $file Full path to the file.
2330 * @param string $filename The name of the file (may differ from $file due to
2331 * $file being in a tmp directory).
2332 * @param array $mimes Key is the file extension with value as the mime type.
2334 return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
2338 * Retrieve list of mime types and file extensions.
2341 * @since 4.2.0 Support was added for GIMP (xcf) files.
2343 * @return array Array of mime types keyed by the file extension regex corresponding to those types.
2345 function wp_get_mime_types() {
2347 * Filters the list of mime types and file extensions.
2349 * This filter should be used to add, not remove, mime types. To remove
2350 * mime types, use the {@see 'upload_mimes'} filter.
2354 * @param array $wp_get_mime_types Mime types keyed by the file extension regex
2355 * corresponding to those types.
2357 return apply_filters( 'mime_types', array(
2359 'jpg|jpeg|jpe' => 'image/jpeg',
2360 'gif' => 'image/gif',
2361 'png' => 'image/png',
2362 'bmp' => 'image/bmp',
2363 'tiff|tif' => 'image/tiff',
2364 'ico' => 'image/x-icon',
2366 'asf|asx' => 'video/x-ms-asf',
2367 'wmv' => 'video/x-ms-wmv',
2368 'wmx' => 'video/x-ms-wmx',
2369 'wm' => 'video/x-ms-wm',
2370 'avi' => 'video/avi',
2371 'divx' => 'video/divx',
2372 'flv' => 'video/x-flv',
2373 'mov|qt' => 'video/quicktime',
2374 'mpeg|mpg|mpe' => 'video/mpeg',
2375 'mp4|m4v' => 'video/mp4',
2376 'ogv' => 'video/ogg',
2377 'webm' => 'video/webm',
2378 'mkv' => 'video/x-matroska',
2379 '3gp|3gpp' => 'video/3gpp', // Can also be audio
2380 '3g2|3gp2' => 'video/3gpp2', // Can also be audio
2382 'txt|asc|c|cc|h|srt' => 'text/plain',
2383 'csv' => 'text/csv',
2384 'tsv' => 'text/tab-separated-values',
2385 'ics' => 'text/calendar',
2386 'rtx' => 'text/richtext',
2387 'css' => 'text/css',
2388 'htm|html' => 'text/html',
2389 'vtt' => 'text/vtt',
2390 'dfxp' => 'application/ttaf+xml',
2392 'mp3|m4a|m4b' => 'audio/mpeg',
2393 'ra|ram' => 'audio/x-realaudio',
2394 'wav' => 'audio/wav',
2395 'ogg|oga' => 'audio/ogg',
2396 'mid|midi' => 'audio/midi',
2397 'wma' => 'audio/x-ms-wma',
2398 'wax' => 'audio/x-ms-wax',
2399 'mka' => 'audio/x-matroska',
2400 // Misc application formats.
2401 'rtf' => 'application/rtf',
2402 'js' => 'application/javascript',
2403 'pdf' => 'application/pdf',
2404 'swf' => 'application/x-shockwave-flash',
2405 'class' => 'application/java',
2406 'tar' => 'application/x-tar',
2407 'zip' => 'application/zip',
2408 'gz|gzip' => 'application/x-gzip',
2409 'rar' => 'application/rar',
2410 '7z' => 'application/x-7z-compressed',
2411 'exe' => 'application/x-msdownload',
2412 'psd' => 'application/octet-stream',
2413 'xcf' => 'application/octet-stream',
2414 // MS Office formats.
2415 'doc' => 'application/msword',
2416 'pot|pps|ppt' => 'application/vnd.ms-powerpoint',
2417 'wri' => 'application/vnd.ms-write',
2418 'xla|xls|xlt|xlw' => 'application/vnd.ms-excel',
2419 'mdb' => 'application/vnd.ms-access',
2420 'mpp' => 'application/vnd.ms-project',
2421 'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
2422 'docm' => 'application/vnd.ms-word.document.macroEnabled.12',
2423 'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
2424 'dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
2425 'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
2426 'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
2427 'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
2428 'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
2429 'xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
2430 'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
2431 'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
2432 'pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
2433 'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
2434 'ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
2435 'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
2436 'potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
2437 'ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
2438 'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
2439 'sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
2440 'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
2441 'oxps' => 'application/oxps',
2442 'xps' => 'application/vnd.ms-xpsdocument',
2443 // OpenOffice formats.
2444 'odt' => 'application/vnd.oasis.opendocument.text',
2445 'odp' => 'application/vnd.oasis.opendocument.presentation',
2446 'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
2447 'odg' => 'application/vnd.oasis.opendocument.graphics',
2448 'odc' => 'application/vnd.oasis.opendocument.chart',
2449 'odb' => 'application/vnd.oasis.opendocument.database',
2450 'odf' => 'application/vnd.oasis.opendocument.formula',
2451 // WordPerfect formats.
2452 'wp|wpd' => 'application/wordperfect',
2454 'key' => 'application/vnd.apple.keynote',
2455 'numbers' => 'application/vnd.apple.numbers',
2456 'pages' => 'application/vnd.apple.pages',
2461 * Retrieves the list of common file extensions and their types.
2465 * @return array Array of file extensions types keyed by the type of file.
2467 function wp_get_ext_types() {
2470 * Filters file type based on the extension name.
2474 * @see wp_ext2type()
2476 * @param array $ext2type Multi-dimensional array with extensions for a default set
2479 return apply_filters( 'ext2type', array(
2480 'image' => array( 'jpg', 'jpeg', 'jpe', 'gif', 'png', 'bmp', 'tif', 'tiff', 'ico' ),
2481 'audio' => array( 'aac', 'ac3', 'aif', 'aiff', 'm3a', 'm4a', 'm4b', 'mka', 'mp1', 'mp2', 'mp3', 'ogg', 'oga', 'ram', 'wav', 'wma' ),
2482 'video' => array( '3g2', '3gp', '3gpp', 'asf', 'avi', 'divx', 'dv', 'flv', 'm4v', 'mkv', 'mov', 'mp4', 'mpeg', 'mpg', 'mpv', 'ogm', 'ogv', 'qt', 'rm', 'vob', 'wmv' ),
2483 'document' => array( 'doc', 'docx', 'docm', 'dotm', 'odt', 'pages', 'pdf', 'xps', 'oxps', 'rtf', 'wp', 'wpd', 'psd', 'xcf' ),
2484 'spreadsheet' => array( 'numbers', 'ods', 'xls', 'xlsx', 'xlsm', 'xlsb' ),
2485 'interactive' => array( 'swf', 'key', 'ppt', 'pptx', 'pptm', 'pps', 'ppsx', 'ppsm', 'sldx', 'sldm', 'odp' ),
2486 'text' => array( 'asc', 'csv', 'tsv', 'txt' ),
2487 'archive' => array( 'bz2', 'cab', 'dmg', 'gz', 'rar', 'sea', 'sit', 'sqx', 'tar', 'tgz', 'zip', '7z' ),
2488 'code' => array( 'css', 'htm', 'html', 'php', 'js' ),
2493 * Retrieve list of allowed mime types and file extensions.
2497 * @param int|WP_User $user Optional. User to check. Defaults to current user.
2498 * @return array Array of mime types keyed by the file extension regex corresponding
2501 function get_allowed_mime_types( $user = null ) {
2502 $t = wp_get_mime_types();
2504 unset( $t['swf'], $t['exe'] );
2505 if ( function_exists( 'current_user_can' ) )
2506 $unfiltered = $user ? user_can( $user, 'unfiltered_html' ) : current_user_can( 'unfiltered_html' );
2508 if ( empty( $unfiltered ) )
2509 unset( $t['htm|html'] );
2512 * Filters list of allowed mime types and file extensions.
2516 * @param array $t Mime types keyed by the file extension regex corresponding to
2517 * those types. 'swf' and 'exe' removed from full list. 'htm|html' also
2518 * removed depending on '$user' capabilities.
2519 * @param int|WP_User|null $user User ID, User object or null if not provided (indicates current user).
2521 return apply_filters( 'upload_mimes', $t, $user );
2525 * Display "Are You Sure" message to confirm the action being taken.
2527 * If the action has the nonce explain message, then it will be displayed
2528 * along with the "Are you sure?" message.
2532 * @param string $action The nonce action.
2534 function wp_nonce_ays( $action ) {
2535 if ( 'log-out' == $action ) {
2537 /* translators: %s: site name */
2538 __( 'You are attempting to log out of %s' ),
2539 get_bloginfo( 'name' )
2542 $redirect_to = isset( $_REQUEST['redirect_to'] ) ? $_REQUEST['redirect_to'] : '';
2544 /* translators: %s: logout URL */
2545 __( 'Do you really want to <a href="%s">log out</a>?' ),
2546 wp_logout_url( $redirect_to )
2549 $html = __( 'Are you sure you want to do this?' );
2550 if ( wp_get_referer() ) {
2552 $html .= sprintf( '<a href="%s">%s</a>',
2553 esc_url( remove_query_arg( 'updated', wp_get_referer() ) ),
2554 __( 'Please try again.' )
2559 wp_die( $html, __( 'WordPress Failure Notice' ), 403 );
2563 * Kill WordPress execution and display HTML message with error message.
2565 * This function complements the `die()` PHP function. The difference is that
2566 * HTML will be displayed to the user. It is recommended to use this function
2567 * only when the execution should not continue any further. It is not recommended
2568 * to call this function very often, and try to handle as many errors as possible
2569 * silently or more gracefully.
2571 * As a shorthand, the desired HTTP response code may be passed as an integer to
2572 * the `$title` parameter (the default title would apply) or the `$args` parameter.
2575 * @since 4.1.0 The `$title` and `$args` parameters were changed to optionally accept
2576 * an integer to be used as the response code.
2578 * @param string|WP_Error $message Optional. Error message. If this is a WP_Error object,
2579 * and not an Ajax or XML-RPC request, the error's messages are used.
2581 * @param string|int $title Optional. Error title. If `$message` is a `WP_Error` object,
2582 * error data with the key 'title' may be used to specify the title.
2583 * If `$title` is an integer, then it is treated as the response
2584 * code. Default empty.
2585 * @param string|array|int $args {
2586 * Optional. Arguments to control behavior. If `$args` is an integer, then it is treated
2587 * as the response code. Default empty array.
2589 * @type int $response The HTTP response code. Default 200 for Ajax requests, 500 otherwise.
2590 * @type bool $back_link Whether to include a link to go back. Default false.
2591 * @type string $text_direction The text direction. This is only useful internally, when WordPress
2592 * is still loading and the site's locale is not set up yet. Accepts 'rtl'.
2593 * Default is the value of is_rtl().
2596 function wp_die( $message = '', $title = '', $args = array() ) {
2598 if ( is_int( $args ) ) {
2599 $args = array( 'response' => $args );
2600 } elseif ( is_int( $title ) ) {
2601 $args = array( 'response' => $title );
2605 if ( wp_doing_ajax() ) {
2607 * Filters the callback for killing WordPress execution for Ajax requests.
2611 * @param callable $function Callback function name.
2613 $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );
2614 } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) {
2616 * Filters the callback for killing WordPress execution for XML-RPC requests.
2620 * @param callable $function Callback function name.
2622 $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' );
2625 * Filters the callback for killing WordPress execution for all non-Ajax, non-XML-RPC requests.
2629 * @param callable $function Callback function name.
2631 $function = apply_filters( 'wp_die_handler', '_default_wp_die_handler' );
2634 call_user_func( $function, $message, $title, $args );
2638 * Kills WordPress execution and display HTML message with error message.
2640 * This is the default handler for wp_die if you want a custom one for your
2641 * site then you can overload using the {@see 'wp_die_handler'} filter in wp_die().
2646 * @param string|WP_Error $message Error message or WP_Error object.
2647 * @param string $title Optional. Error title. Default empty.
2648 * @param string|array $args Optional. Arguments to control behavior. Default empty array.
2650 function _default_wp_die_handler( $message, $title = '', $args = array() ) {
2651 $defaults = array( 'response' => 500 );
2652 $r = wp_parse_args($args, $defaults);
2654 $have_gettext = function_exists('__');
2656 if ( function_exists( 'is_wp_error' ) && is_wp_error( $message ) ) {
2657 if ( empty( $title ) ) {
2658 $error_data = $message->get_error_data();
2659 if ( is_array( $error_data ) && isset( $error_data['title'] ) )
2660 $title = $error_data['title'];
2662 $errors = $message->get_error_messages();
2663 switch ( count( $errors ) ) {
2668 $message = "<p>{$errors[0]}</p>";
2671 $message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $errors ) . "</li>\n\t</ul>";
2674 } elseif ( is_string( $message ) ) {
2675 $message = "<p>$message</p>";
2678 if ( isset( $r['back_link'] ) && $r['back_link'] ) {
2679 $back_text = $have_gettext? __('« Back') : '« Back';
2680 $message .= "\n<p><a href='javascript:history.back()'>$back_text</a></p>";
2683 if ( ! did_action( 'admin_head' ) ) :
2684 if ( !headers_sent() ) {
2685 status_header( $r['response'] );
2687 header( 'Content-Type: text/html; charset=utf-8' );
2690 if ( empty($title) )
2691 $title = $have_gettext ? __('WordPress › Error') : 'WordPress › Error';
2693 $text_direction = 'ltr';
2694 if ( isset($r['text_direction']) && 'rtl' == $r['text_direction'] )
2695 $text_direction = 'rtl';
2696 elseif ( function_exists( 'is_rtl' ) && is_rtl() )
2697 $text_direction = 'rtl';
2700 <!-- Ticket #11289, IE bug fix: always pad the error page with enough characters such that it is greater than 512 bytes, even after gzip compression abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono
2702 <html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) language_attributes(); else echo "dir='$text_direction'"; ?>>
2704 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
2705 <meta name="viewport" content="width=device-width">
2707 if ( function_exists( 'wp_no_robots' ) ) {
2711 <title><?php echo $title ?></title>
2712 <style type="text/css">
2714 background: #f1f1f1;
2719 font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
2723 -webkit-box-shadow: 0 1px 3px rgba(0,0,0,0.13);
2724 box-shadow: 0 1px 3px rgba(0,0,0,0.13);
2727 border-bottom: 1px solid #dadada;
2733 padding-bottom: 7px;
2741 margin: 25px 0 20px;
2744 font-family: Consolas, Monaco, monospace;
2747 margin-bottom: 10px;
2761 0 0 2px 1px rgba(30, 140, 190, .8);
2764 0 0 2px 1px rgba(30, 140, 190, .8);
2768 background: #f7f7f7;
2769 border: 1px solid #ccc;
2771 display: inline-block;
2772 text-decoration: none;
2777 padding: 0 10px 1px;
2779 -webkit-border-radius: 3px;
2780 -webkit-appearance: none;
2782 white-space: nowrap;
2783 -webkit-box-sizing: border-box;
2784 -moz-box-sizing: border-box;
2785 box-sizing: border-box;
2787 -webkit-box-shadow: 0 1px 0 #ccc;
2788 box-shadow: 0 1px 0 #ccc;
2789 vertical-align: top;
2792 .button.button-large {
2795 padding: 0 12px 2px;
2800 background: #fafafa;
2806 border-color: #5b9dd9;
2807 -webkit-box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
2808 box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
2815 -webkit-box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
2816 box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
2817 -webkit-transform: translateY(1px);
2818 -ms-transform: translateY(1px);
2819 transform: translateY(1px);
2823 if ( 'rtl' == $text_direction ) {
2824 echo 'body { font-family: Tahoma, Arial; }';
2829 <body id="error-page">
2830 <?php endif; // ! did_action( 'admin_head' ) ?>
2831 <?php echo $message; ?>
2839 * Kill WordPress execution and display XML message with error message.
2841 * This is the handler for wp_die when processing XMLRPC requests.
2846 * @global wp_xmlrpc_server $wp_xmlrpc_server
2848 * @param string $message Error message.
2849 * @param string $title Optional. Error title. Default empty.
2850 * @param string|array $args Optional. Arguments to control behavior. Default empty array.
2852 function _xmlrpc_wp_die_handler( $message, $title = '', $args = array() ) {
2853 global $wp_xmlrpc_server;
2854 $defaults = array( 'response' => 500 );
2856 $r = wp_parse_args($args, $defaults);
2858 if ( $wp_xmlrpc_server ) {
2859 $error = new IXR_Error( $r['response'] , $message);
2860 $wp_xmlrpc_server->output( $error->getXml() );
2866 * Kill WordPress ajax execution.
2868 * This is the handler for wp_die when processing Ajax requests.
2873 * @param string $message Error message.
2874 * @param string $title Optional. Error title (unused). Default empty.
2875 * @param string|array $args Optional. Arguments to control behavior. Default empty array.
2877 function _ajax_wp_die_handler( $message, $title = '', $args = array() ) {
2881 $r = wp_parse_args( $args, $defaults );
2883 if ( ! headers_sent() && null !== $r['response'] ) {
2884 status_header( $r['response'] );
2887 if ( is_scalar( $message ) )
2888 die( (string) $message );
2893 * Kill WordPress execution.
2895 * This is the handler for wp_die when processing APP requests.
2900 * @param string $message Optional. Response to print. Default empty.
2902 function _scalar_wp_die_handler( $message = '' ) {
2903 if ( is_scalar( $message ) )
2904 die( (string) $message );
2909 * Encode a variable into JSON, with some sanity checks.
2913 * @param mixed $data Variable (usually an array or object) to encode as JSON.
2914 * @param int $options Optional. Options to be passed to json_encode(). Default 0.
2915 * @param int $depth Optional. Maximum depth to walk through $data. Must be
2916 * greater than 0. Default 512.
2917 * @return string|false The JSON encoded string, or false if it cannot be encoded.
2919 function wp_json_encode( $data, $options = 0, $depth = 512 ) {
2921 * json_encode() has had extra params added over the years.
2922 * $options was added in 5.3, and $depth in 5.5.
2923 * We need to make sure we call it with the correct arguments.
2925 if ( version_compare( PHP_VERSION, '5.5', '>=' ) ) {
2926 $args = array( $data, $options, $depth );
2927 } elseif ( version_compare( PHP_VERSION, '5.3', '>=' ) ) {
2928 $args = array( $data, $options );
2930 $args = array( $data );
2933 // Prepare the data for JSON serialization.
2934 $args[0] = _wp_json_prepare_data( $data );
2936 $json = @call_user_func_array( 'json_encode', $args );
2938 // If json_encode() was successful, no need to do more sanity checking.
2939 // ... unless we're in an old version of PHP, and json_encode() returned
2940 // a string containing 'null'. Then we need to do more sanity checking.
2941 if ( false !== $json && ( version_compare( PHP_VERSION, '5.5', '>=' ) || false === strpos( $json, 'null' ) ) ) {
2946 $args[0] = _wp_json_sanity_check( $data, $depth );
2947 } catch ( Exception $e ) {
2951 return call_user_func_array( 'json_encode', $args );
2955 * Perform sanity checks on data that shall be encoded to JSON.
2961 * @see wp_json_encode()
2963 * @param mixed $data Variable (usually an array or object) to encode as JSON.
2964 * @param int $depth Maximum depth to walk through $data. Must be greater than 0.
2965 * @return mixed The sanitized data that shall be encoded to JSON.
2967 function _wp_json_sanity_check( $data, $depth ) {
2969 throw new Exception( 'Reached depth limit' );
2972 if ( is_array( $data ) ) {
2974 foreach ( $data as $id => $el ) {
2975 // Don't forget to sanitize the ID!
2976 if ( is_string( $id ) ) {
2977 $clean_id = _wp_json_convert_string( $id );
2982 // Check the element type, so that we're only recursing if we really have to.
2983 if ( is_array( $el ) || is_object( $el ) ) {
2984 $output[ $clean_id ] = _wp_json_sanity_check( $el, $depth - 1 );
2985 } elseif ( is_string( $el ) ) {
2986 $output[ $clean_id ] = _wp_json_convert_string( $el );
2988 $output[ $clean_id ] = $el;
2991 } elseif ( is_object( $data ) ) {
2992 $output = new stdClass;
2993 foreach ( $data as $id => $el ) {
2994 if ( is_string( $id ) ) {
2995 $clean_id = _wp_json_convert_string( $id );
3000 if ( is_array( $el ) || is_object( $el ) ) {
3001 $output->$clean_id = _wp_json_sanity_check( $el, $depth - 1 );
3002 } elseif ( is_string( $el ) ) {
3003 $output->$clean_id = _wp_json_convert_string( $el );
3005 $output->$clean_id = $el;
3008 } elseif ( is_string( $data ) ) {
3009 return _wp_json_convert_string( $data );
3018 * Convert a string to UTF-8, so that it can be safely encoded to JSON.
3024 * @see _wp_json_sanity_check()
3026 * @staticvar bool $use_mb
3028 * @param string $string The string which is to be converted.
3029 * @return string The checked string.
3031 function _wp_json_convert_string( $string ) {
3032 static $use_mb = null;
3033 if ( is_null( $use_mb ) ) {
3034 $use_mb = function_exists( 'mb_convert_encoding' );
3038 $encoding = mb_detect_encoding( $string, mb_detect_order(), true );
3040 return mb_convert_encoding( $string, 'UTF-8', $encoding );
3042 return mb_convert_encoding( $string, 'UTF-8', 'UTF-8' );
3045 return wp_check_invalid_utf8( $string, true );
3050 * Prepares response data to be serialized to JSON.
3052 * This supports the JsonSerializable interface for PHP 5.2-5.3 as well.
3058 * @param mixed $data Native representation.
3059 * @return bool|int|float|null|string|array Data ready for `json_encode()`.
3061 function _wp_json_prepare_data( $data ) {
3062 if ( ! defined( 'WP_JSON_SERIALIZE_COMPATIBLE' ) || WP_JSON_SERIALIZE_COMPATIBLE === false ) {
3066 switch ( gettype( $data ) ) {
3072 // These values can be passed through.
3076 // Arrays must be mapped in case they also return objects.
3077 return array_map( '_wp_json_prepare_data', $data );
3080 // If this is an incomplete object (__PHP_Incomplete_Class), bail.
3081 if ( ! is_object( $data ) ) {
3085 if ( $data instanceof JsonSerializable ) {
3086 $data = $data->jsonSerialize();
3088 $data = get_object_vars( $data );
3091 // Now, pass the array (or whatever was returned from jsonSerialize through).
3092 return _wp_json_prepare_data( $data );
3100 * Send a JSON response back to an Ajax request.
3103 * @since 4.7.0 The `$status_code` parameter was added.
3105 * @param mixed $response Variable (usually an array or object) to encode as JSON,
3106 * then print and die.
3107 * @param int $status_code The HTTP status code to output.
3109 function wp_send_json( $response, $status_code = null ) {
3110 @header( 'Content-Type: application/json; charset=' . get_option( 'blog_charset' ) );
3111 if ( null !== $status_code ) {
3112 status_header( $status_code );
3114 echo wp_json_encode( $response );
3116 if ( wp_doing_ajax() ) {
3117 wp_die( '', '', array(
3126 * Send a JSON response back to an Ajax request, indicating success.
3129 * @since 4.7.0 The `$status_code` parameter was added.
3131 * @param mixed $data Data to encode as JSON, then print and die.
3132 * @param int $status_code The HTTP status code to output.
3134 function wp_send_json_success( $data = null, $status_code = null ) {
3135 $response = array( 'success' => true );
3137 if ( isset( $data ) )
3138 $response['data'] = $data;
3140 wp_send_json( $response, $status_code );
3144 * Send a JSON response back to an Ajax request, indicating failure.
3146 * If the `$data` parameter is a WP_Error object, the errors
3147 * within the object are processed and output as an array of error
3148 * codes and corresponding messages. All other types are output
3149 * without further processing.
3152 * @since 4.1.0 The `$data` parameter is now processed if a WP_Error object is passed in.
3153 * @since 4.7.0 The `$status_code` parameter was added.
3155 * @param mixed $data Data to encode as JSON, then print and die.
3156 * @param int $status_code The HTTP status code to output.
3158 function wp_send_json_error( $data = null, $status_code = null ) {
3159 $response = array( 'success' => false );
3161 if ( isset( $data ) ) {
3162 if ( is_wp_error( $data ) ) {
3164 foreach ( $data->errors as $code => $messages ) {
3165 foreach ( $messages as $message ) {
3166 $result[] = array( 'code' => $code, 'message' => $message );
3170 $response['data'] = $result;
3172 $response['data'] = $data;
3176 wp_send_json( $response, $status_code );
3180 * Checks that a JSONP callback is a valid JavaScript callback.
3182 * Only allows alphanumeric characters and the dot character in callback
3183 * function names. This helps to mitigate XSS attacks caused by directly
3184 * outputting user input.
3188 * @param string $callback Supplied JSONP callback function.
3189 * @return bool True if valid callback, otherwise false.
3191 function wp_check_jsonp_callback( $callback ) {
3192 if ( ! is_string( $callback ) ) {
3196 preg_replace( '/[^\w\.]/', '', $callback, -1, $illegal_char_count );
3198 return 0 === $illegal_char_count;
3202 * Retrieve the WordPress home page URL.
3204 * If the constant named 'WP_HOME' exists, then it will be used and returned
3205 * by the function. This can be used to counter the redirection on your local
3206 * development environment.
3213 * @param string $url URL for the home location.
3214 * @return string Homepage location.
3216 function _config_wp_home( $url = '' ) {
3217 if ( defined( 'WP_HOME' ) )
3218 return untrailingslashit( WP_HOME );
3223 * Retrieve the WordPress site URL.
3225 * If the constant named 'WP_SITEURL' is defined, then the value in that
3226 * constant will always be returned. This can be used for debugging a site
3227 * on your localhost while not having to change the database to your URL.
3234 * @param string $url URL to set the WordPress site location.
3235 * @return string The WordPress Site URL.
3237 function _config_wp_siteurl( $url = '' ) {
3238 if ( defined( 'WP_SITEURL' ) )
3239 return untrailingslashit( WP_SITEURL );
3244 * Delete the fresh site option.
3249 function _delete_option_fresh_site() {
3250 update_option( 'fresh_site', 0 );
3254 * Set the localized direction for MCE plugin.
3256 * Will only set the direction to 'rtl', if the WordPress locale has
3257 * the text direction set to 'rtl'.
3259 * Fills in the 'directionality' setting, enables the 'directionality'
3260 * plugin, and adds the 'ltr' button to 'toolbar1', formerly
3261 * 'theme_advanced_buttons1' array keys. These keys are then returned
3262 * in the $mce_init (TinyMCE settings) array.
3267 * @param array $mce_init MCE settings array.
3268 * @return array Direction set for 'rtl', if needed by locale.
3270 function _mce_set_direction( $mce_init ) {
3272 $mce_init['directionality'] = 'rtl';
3273 $mce_init['rtl_ui'] = true;
3275 if ( ! empty( $mce_init['plugins'] ) && strpos( $mce_init['plugins'], 'directionality' ) === false ) {
3276 $mce_init['plugins'] .= ',directionality';
3279 if ( ! empty( $mce_init['toolbar1'] ) && ! preg_match( '/\bltr\b/', $mce_init['toolbar1'] ) ) {
3280 $mce_init['toolbar1'] .= ',ltr';
3289 * Convert smiley code to the icon graphic file equivalent.
3291 * You can turn off smilies, by going to the write setting screen and unchecking
3292 * the box, or by setting 'use_smilies' option to false or removing the option.
3294 * Plugins may override the default smiley list by setting the $wpsmiliestrans
3295 * to an array, with the key the code the blogger types in and the value the
3298 * The $wp_smiliessearch global is for the regular expression and is set each
3299 * time the function is called.
3301 * The full list of smilies can be found in the function and won't be listed in
3302 * the description. Probably should create a Codex page for it, so that it is
3305 * @global array $wpsmiliestrans
3306 * @global array $wp_smiliessearch
3310 function smilies_init() {
3311 global $wpsmiliestrans, $wp_smiliessearch;
3313 // don't bother setting up smilies if they are disabled
3314 if ( !get_option( 'use_smilies' ) )
3317 if ( !isset( $wpsmiliestrans ) ) {
3318 $wpsmiliestrans = array(
3319 ':mrgreen:' => 'mrgreen.png',
3320 ':neutral:' => "\xf0\x9f\x98\x90",
3321 ':twisted:' => "\xf0\x9f\x98\x88",
3322 ':arrow:' => "\xe2\x9e\xa1",
3323 ':shock:' => "\xf0\x9f\x98\xaf",
3324 ':smile:' => "\xf0\x9f\x99\x82",
3325 ':???:' => "\xf0\x9f\x98\x95",
3326 ':cool:' => "\xf0\x9f\x98\x8e",
3327 ':evil:' => "\xf0\x9f\x91\xbf",
3328 ':grin:' => "\xf0\x9f\x98\x80",
3329 ':idea:' => "\xf0\x9f\x92\xa1",
3330 ':oops:' => "\xf0\x9f\x98\xb3",
3331 ':razz:' => "\xf0\x9f\x98\x9b",
3332 ':roll:' => "\xf0\x9f\x99\x84",
3333 ':wink:' => "\xf0\x9f\x98\x89",
3334 ':cry:' => "\xf0\x9f\x98\xa5",
3335 ':eek:' => "\xf0\x9f\x98\xae",
3336 ':lol:' => "\xf0\x9f\x98\x86",
3337 ':mad:' => "\xf0\x9f\x98\xa1",
3338 ':sad:' => "\xf0\x9f\x99\x81",
3339 '8-)' => "\xf0\x9f\x98\x8e",
3340 '8-O' => "\xf0\x9f\x98\xaf",
3341 ':-(' => "\xf0\x9f\x99\x81",
3342 ':-)' => "\xf0\x9f\x99\x82",
3343 ':-?' => "\xf0\x9f\x98\x95",
3344 ':-D' => "\xf0\x9f\x98\x80",
3345 ':-P' => "\xf0\x9f\x98\x9b",
3346 ':-o' => "\xf0\x9f\x98\xae",
3347 ':-x' => "\xf0\x9f\x98\xa1",
3348 ':-|' => "\xf0\x9f\x98\x90",
3349 ';-)' => "\xf0\x9f\x98\x89",
3350 // This one transformation breaks regular text with frequency.
3351 // '8)' => "\xf0\x9f\x98\x8e",
3352 '8O' => "\xf0\x9f\x98\xaf",
3353 ':(' => "\xf0\x9f\x99\x81",
3354 ':)' => "\xf0\x9f\x99\x82",
3355 ':?' => "\xf0\x9f\x98\x95",
3356 ':D' => "\xf0\x9f\x98\x80",
3357 ':P' => "\xf0\x9f\x98\x9b",
3358 ':o' => "\xf0\x9f\x98\xae",
3359 ':x' => "\xf0\x9f\x98\xa1",
3360 ':|' => "\xf0\x9f\x98\x90",
3361 ';)' => "\xf0\x9f\x98\x89",
3362 ':!:' => "\xe2\x9d\x97",
3363 ':?:' => "\xe2\x9d\x93",
3368 * Filters all the smilies.
3370 * This filter must be added before `smilies_init` is run, as
3371 * it is normally only run once to setup the smilies regex.
3375 * @param array $wpsmiliestrans List of the smilies.
3377 $wpsmiliestrans = apply_filters('smilies', $wpsmiliestrans);
3379 if (count($wpsmiliestrans) == 0) {
3384 * NOTE: we sort the smilies in reverse key order. This is to make sure
3385 * we match the longest possible smilie (:???: vs :?) as the regular
3386 * expression used below is first-match
3388 krsort($wpsmiliestrans);
3390 $spaces = wp_spaces_regexp();
3392 // Begin first "subpattern"
3393 $wp_smiliessearch = '/(?<=' . $spaces . '|^)';
3396 foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
3397 $firstchar = substr($smiley, 0, 1);
3398 $rest = substr($smiley, 1);
3401 if ($firstchar != $subchar) {
3402 if ($subchar != '') {
3403 $wp_smiliessearch .= ')(?=' . $spaces . '|$)'; // End previous "subpattern"
3404 $wp_smiliessearch .= '|(?<=' . $spaces . '|^)'; // Begin another "subpattern"
3406 $subchar = $firstchar;
3407 $wp_smiliessearch .= preg_quote($firstchar, '/') . '(?:';
3409 $wp_smiliessearch .= '|';
3411 $wp_smiliessearch .= preg_quote($rest, '/');
3414 $wp_smiliessearch .= ')(?=' . $spaces . '|$)/m';
3419 * Merge user defined arguments into defaults array.
3421 * This function is used throughout WordPress to allow for both string or array
3422 * to be merged into another array.
3425 * @since 2.3.0 `$args` can now also be an object.
3427 * @param string|array|object $args Value to merge with $defaults.
3428 * @param array $defaults Optional. Array that serves as the defaults. Default empty.
3429 * @return array Merged user defined values with defaults.
3431 function wp_parse_args( $args, $defaults = '' ) {
3432 if ( is_object( $args ) )
3433 $r = get_object_vars( $args );
3434 elseif ( is_array( $args ) )
3437 wp_parse_str( $args, $r );
3439 if ( is_array( $defaults ) )
3440 return array_merge( $defaults, $r );
3445 * Clean up an array, comma- or space-separated list of IDs.
3449 * @param array|string $list List of ids.
3450 * @return array Sanitized array of IDs.
3452 function wp_parse_id_list( $list ) {
3453 if ( !is_array($list) )
3454 $list = preg_split('/[\s,]+/', $list);
3456 return array_unique(array_map('absint', $list));
3460 * Clean up an array, comma- or space-separated list of slugs.
3464 * @param array|string $list List of slugs.
3465 * @return array Sanitized array of slugs.
3467 function wp_parse_slug_list( $list ) {
3468 if ( ! is_array( $list ) ) {
3469 $list = preg_split( '/[\s,]+/', $list );
3472 foreach ( $list as $key => $value ) {
3473 $list[ $key ] = sanitize_title( $value );
3476 return array_unique( $list );
3480 * Extract a slice of an array, given a list of keys.
3484 * @param array $array The original array.
3485 * @param array $keys The list of keys.
3486 * @return array The array slice.
3488 function wp_array_slice_assoc( $array, $keys ) {
3490 foreach ( $keys as $key )
3491 if ( isset( $array[ $key ] ) )
3492 $slice[ $key ] = $array[ $key ];
3498 * Determines if the variable is a numeric-indexed array.
3502 * @param mixed $data Variable to check.
3503 * @return bool Whether the variable is a list.
3505 function wp_is_numeric_array( $data ) {
3506 if ( ! is_array( $data ) ) {
3510 $keys = array_keys( $data );
3511 $string_keys = array_filter( $keys, 'is_string' );
3512 return count( $string_keys ) === 0;
3516 * Filters a list of objects, based on a set of key => value arguments.
3519 * @since 4.7.0 Uses WP_List_Util class.
3521 * @param array $list An array of objects to filter
3522 * @param array $args Optional. An array of key => value arguments to match
3523 * against each object. Default empty array.
3524 * @param string $operator Optional. The logical operation to perform. 'or' means
3525 * only one element from the array needs to match; 'and'
3526 * means all elements must match; 'not' means no elements may
3527 * match. Default 'and'.
3528 * @param bool|string $field A field from the object to place instead of the entire object.
3530 * @return array A list of objects or object fields.
3532 function wp_filter_object_list( $list, $args = array(), $operator = 'and', $field = false ) {
3533 if ( ! is_array( $list ) ) {
3537 $util = new WP_List_Util( $list );
3539 $util->filter( $args, $operator );
3542 $util->pluck( $field );
3545 return $util->get_output();
3549 * Filters a list of objects, based on a set of key => value arguments.
3552 * @since 4.7.0 Uses WP_List_Util class.
3554 * @param array $list An array of objects to filter.
3555 * @param array $args Optional. An array of key => value arguments to match
3556 * against each object. Default empty array.
3557 * @param string $operator Optional. The logical operation to perform. 'AND' means
3558 * all elements from the array must match. 'OR' means only
3559 * one element needs to match. 'NOT' means no elements may
3560 * match. Default 'AND'.
3561 * @return array Array of found values.
3563 function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
3564 if ( ! is_array( $list ) ) {
3568 $util = new WP_List_Util( $list );
3569 return $util->filter( $args, $operator );
3573 * Pluck a certain field out of each object in a list.
3575 * This has the same functionality and prototype of
3576 * array_column() (PHP 5.5) but also supports objects.
3579 * @since 4.0.0 $index_key parameter added.
3580 * @since 4.7.0 Uses WP_List_Util class.
3582 * @param array $list List of objects or arrays
3583 * @param int|string $field Field from the object to place instead of the entire object
3584 * @param int|string $index_key Optional. Field from the object to use as keys for the new array.
3586 * @return array Array of found values. If `$index_key` is set, an array of found values with keys
3587 * corresponding to `$index_key`. If `$index_key` is null, array keys from the original
3588 * `$list` will be preserved in the results.
3590 function wp_list_pluck( $list, $field, $index_key = null ) {
3591 $util = new WP_List_Util( $list );
3592 return $util->pluck( $field, $index_key );
3596 * Sorts a list of objects, based on one or more orderby arguments.
3600 * @param array $list An array of objects to filter.
3601 * @param string|array $orderby Optional. Either the field name to order by or an array
3602 * of multiple orderby fields as $orderby => $order.
3603 * @param string $order Optional. Either 'ASC' or 'DESC'. Only used if $orderby
3605 * @param bool $preserve_keys Optional. Whether to preserve keys. Default false.
3606 * @return array The sorted array.
3608 function wp_list_sort( $list, $orderby = array(), $order = 'ASC', $preserve_keys = false ) {
3609 if ( ! is_array( $list ) ) {
3613 $util = new WP_List_Util( $list );
3614 return $util->sort( $orderby, $order, $preserve_keys );
3618 * Determines if Widgets library should be loaded.
3620 * Checks to make sure that the widgets library hasn't already been loaded.
3621 * If it hasn't, then it will load the widgets library and run an action hook.
3625 function wp_maybe_load_widgets() {
3627 * Filters whether to load the Widgets library.
3629 * Passing a falsey value to the filter will effectively short-circuit
3630 * the Widgets library from loading.
3634 * @param bool $wp_maybe_load_widgets Whether to load the Widgets library.
3637 if ( ! apply_filters( 'load_default_widgets', true ) ) {
3641 require_once( ABSPATH . WPINC . '/default-widgets.php' );
3643 add_action( '_admin_menu', 'wp_widgets_add_menu' );
3647 * Append the Widgets menu to the themes main menu.
3651 * @global array $submenu
3653 function wp_widgets_add_menu() {
3656 if ( ! current_theme_supports( 'widgets' ) )
3659 $submenu['themes.php'][7] = array( __( 'Widgets' ), 'edit_theme_options', 'widgets.php' );
3660 ksort( $submenu['themes.php'], SORT_NUMERIC );
3664 * Flush all output buffers for PHP 5.2.
3666 * Make sure all output buffers are flushed before our singletons are destroyed.
3670 function wp_ob_end_flush_all() {
3671 $levels = ob_get_level();
3672 for ($i=0; $i<$levels; $i++)
3677 * Load custom DB error or display WordPress DB error.
3679 * If a file exists in the wp-content directory named db-error.php, then it will
3680 * be loaded instead of displaying the WordPress DB error. If it is not found,
3681 * then the WordPress DB error will be displayed instead.
3683 * The WordPress DB error sets the HTTP status header to 500 to try to prevent
3684 * search engines from caching the message. Custom DB messages should do the
3687 * This function was backported to WordPress 2.3.2, but originally was added
3688 * in WordPress 2.5.0.
3692 * @global wpdb $wpdb WordPress database abstraction object.
3694 function dead_db() {
3697 wp_load_translations_early();
3699 // Load custom DB error template, if present.
3700 if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
3701 require_once( WP_CONTENT_DIR . '/db-error.php' );
3705 // If installing or in the admin, provide the verbose message.
3706 if ( wp_installing() || defined( 'WP_ADMIN' ) )
3707 wp_die($wpdb->error);
3709 // Otherwise, be terse.
3710 status_header( 500 );
3712 header( 'Content-Type: text/html; charset=utf-8' );
3715 <html xmlns="http://www.w3.org/1999/xhtml"<?php if ( is_rtl() ) echo ' dir="rtl"'; ?>>
3717 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
3718 <title><?php _e( 'Database Error' ); ?></title>
3722 <h1><?php _e( 'Error establishing a database connection' ); ?></h1>
3730 * Convert a value to non-negative integer.
3734 * @param mixed $maybeint Data you wish to have converted to a non-negative integer.
3735 * @return int A non-negative integer.
3737 function absint( $maybeint ) {
3738 return abs( intval( $maybeint ) );
3742 * Mark a function as deprecated and inform when it has been used.
3744 * There is a {@see 'hook deprecated_function_run'} that will be called that can be used
3745 * to get the backtrace up to what file and function called the deprecated
3748 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
3750 * This function is to be used in every function that is deprecated.
3755 * @param string $function The function that was called.
3756 * @param string $version The version of WordPress that deprecated the function.
3757 * @param string $replacement Optional. The function that should have been called. Default null.
3759 function _deprecated_function( $function, $version, $replacement = null ) {
3762 * Fires when a deprecated function is called.
3766 * @param string $function The function that was called.
3767 * @param string $replacement The function that should have been called.
3768 * @param string $version The version of WordPress that deprecated the function.
3770 do_action( 'deprecated_function_run', $function, $replacement, $version );
3773 * Filters whether to trigger an error for deprecated functions.
3777 * @param bool $trigger Whether to trigger the error for deprecated functions. Default true.
3779 if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
3780 if ( function_exists( '__' ) ) {
3781 if ( ! is_null( $replacement ) ) {
3782 /* translators: 1: PHP function name, 2: version number, 3: alternative function name */
3783 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
3785 /* translators: 1: PHP function name, 2: version number */
3786 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
3789 if ( ! is_null( $replacement ) ) {
3790 trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $function, $version, $replacement ) );
3792 trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
3799 * Marks a constructor as deprecated and informs when it has been used.
3801 * Similar to _deprecated_function(), but with different strings. Used to
3802 * remove PHP4 style constructors.
3804 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
3806 * This function is to be used in every PHP4 style constructor method that is deprecated.
3809 * @since 4.5.0 Added the `$parent_class` parameter.
3813 * @param string $class The class containing the deprecated constructor.
3814 * @param string $version The version of WordPress that deprecated the function.
3815 * @param string $parent_class Optional. The parent class calling the deprecated constructor.
3816 * Default empty string.
3818 function _deprecated_constructor( $class, $version, $parent_class = '' ) {
3821 * Fires when a deprecated constructor is called.
3824 * @since 4.5.0 Added the `$parent_class` parameter.
3826 * @param string $class The class containing the deprecated constructor.
3827 * @param string $version The version of WordPress that deprecated the function.
3828 * @param string $parent_class The parent class calling the deprecated constructor.
3830 do_action( 'deprecated_constructor_run', $class, $version, $parent_class );
3833 * Filters whether to trigger an error for deprecated functions.
3835 * `WP_DEBUG` must be true in addition to the filter evaluating to true.
3839 * @param bool $trigger Whether to trigger the error for deprecated functions. Default true.
3841 if ( WP_DEBUG && apply_filters( 'deprecated_constructor_trigger_error', true ) ) {
3842 if ( function_exists( '__' ) ) {
3843 if ( ! empty( $parent_class ) ) {
3844 /* translators: 1: PHP class name, 2: PHP parent class name, 3: version number, 4: __construct() method */
3845 trigger_error( sprintf( __( 'The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.' ),
3846 $class, $parent_class, $version, '<pre>__construct()</pre>' ) );
3848 /* translators: 1: PHP class name, 2: version number, 3: __construct() method */
3849 trigger_error( sprintf( __( 'The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ),
3850 $class, $version, '<pre>__construct()</pre>' ) );
3853 if ( ! empty( $parent_class ) ) {
3854 trigger_error( sprintf( 'The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.',
3855 $class, $parent_class, $version, '<pre>__construct()</pre>' ) );
3857 trigger_error( sprintf( 'The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.',
3858 $class, $version, '<pre>__construct()</pre>' ) );
3866 * Mark a file as deprecated and inform when it has been used.
3868 * There is a hook {@see 'deprecated_file_included'} that will be called that can be used
3869 * to get the backtrace up to what file and function included the deprecated
3872 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
3874 * This function is to be used in every file that is deprecated.
3879 * @param string $file The file that was included.
3880 * @param string $version The version of WordPress that deprecated the file.
3881 * @param string $replacement Optional. The file that should have been included based on ABSPATH.
3883 * @param string $message Optional. A message regarding the change. Default empty.
3885 function _deprecated_file( $file, $version, $replacement = null, $message = '' ) {
3888 * Fires when a deprecated file is called.
3892 * @param string $file The file that was called.
3893 * @param string $replacement The file that should have been included based on ABSPATH.
3894 * @param string $version The version of WordPress that deprecated the file.
3895 * @param string $message A message regarding the change.
3897 do_action( 'deprecated_file_included', $file, $replacement, $version, $message );
3900 * Filters whether to trigger an error for deprecated files.
3904 * @param bool $trigger Whether to trigger the error for deprecated files. Default true.
3906 if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
3907 $message = empty( $message ) ? '' : ' ' . $message;
3908 if ( function_exists( '__' ) ) {
3909 if ( ! is_null( $replacement ) ) {
3910 /* translators: 1: PHP file name, 2: version number, 3: alternative file name */
3911 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message );
3913 /* translators: 1: PHP file name, 2: version number */
3914 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message );
3917 if ( ! is_null( $replacement ) ) {
3918 trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.', $file, $version, $replacement ) . $message );
3920 trigger_error( sprintf( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.', $file, $version ) . $message );
3926 * Mark a function argument as deprecated and inform when it has been used.
3928 * This function is to be used whenever a deprecated function argument is used.
3929 * Before this function is called, the argument must be checked for whether it was
3930 * used by comparing it to its default value or evaluating whether it is empty.
3933 * if ( ! empty( $deprecated ) ) {
3934 * _deprecated_argument( __FUNCTION__, '3.0.0' );
3938 * There is a hook deprecated_argument_run that will be called that can be used
3939 * to get the backtrace up to what file and function used the deprecated
3942 * The current behavior is to trigger a user error if WP_DEBUG is true.
3947 * @param string $function The function that was called.
3948 * @param string $version The version of WordPress that deprecated the argument used.
3949 * @param string $message Optional. A message regarding the change. Default null.
3951 function _deprecated_argument( $function, $version, $message = null ) {
3954 * Fires when a deprecated argument is called.
3958 * @param string $function The function that was called.
3959 * @param string $message A message regarding the change.
3960 * @param string $version The version of WordPress that deprecated the argument used.
3962 do_action( 'deprecated_argument_run', $function, $message, $version );
3965 * Filters whether to trigger an error for deprecated arguments.
3969 * @param bool $trigger Whether to trigger the error for deprecated arguments. Default true.
3971 if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
3972 if ( function_exists( '__' ) ) {
3973 if ( ! is_null( $message ) ) {
3974 /* translators: 1: PHP function name, 2: version number, 3: optional message regarding the change */
3975 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) );
3977 /* translators: 1: PHP function name, 2: version number */
3978 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
3981 if ( ! is_null( $message ) ) {
3982 trigger_error( sprintf( '%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s', $function, $version, $message ) );
3984 trigger_error( sprintf( '%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.', $function, $version ) );
3991 * Marks a deprecated action or filter hook as deprecated and throws a notice.
3993 * Use the {@see 'deprecated_hook_run'} action to get the backtrace describing where
3994 * the deprecated hook was called.
3996 * Default behavior is to trigger a user error if `WP_DEBUG` is true.
3998 * This function is called by the do_action_deprecated() and apply_filters_deprecated()
3999 * functions, and so generally does not need to be called directly.
4004 * @param string $hook The hook that was used.
4005 * @param string $version The version of WordPress that deprecated the hook.
4006 * @param string $replacement Optional. The hook that should have been used.
4007 * @param string $message Optional. A message regarding the change.
4009 function _deprecated_hook( $hook, $version, $replacement = null, $message = null ) {
4011 * Fires when a deprecated hook is called.
4015 * @param string $hook The hook that was called.
4016 * @param string $replacement The hook that should be used as a replacement.
4017 * @param string $version The version of WordPress that deprecated the argument used.
4018 * @param string $message A message regarding the change.
4020 do_action( 'deprecated_hook_run', $hook, $replacement, $version, $message );
4023 * Filters whether to trigger deprecated hook errors.
4027 * @param bool $trigger Whether to trigger deprecated hook errors. Requires
4028 * `WP_DEBUG` to be defined true.
4030 if ( WP_DEBUG && apply_filters( 'deprecated_hook_trigger_error', true ) ) {
4031 $message = empty( $message ) ? '' : ' ' . $message;
4032 if ( ! is_null( $replacement ) ) {
4033 /* translators: 1: WordPress hook name, 2: version number, 3: alternative hook name */
4034 trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), $hook, $version, $replacement ) . $message );
4036 /* translators: 1: WordPress hook name, 2: version number */
4037 trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.' ), $hook, $version ) . $message );
4043 * Mark something as being incorrectly called.
4045 * There is a hook {@see 'doing_it_wrong_run'} that will be called that can be used
4046 * to get the backtrace up to what file and function called the deprecated
4049 * The current behavior is to trigger a user error if `WP_DEBUG` is true.
4054 * @param string $function The function that was called.
4055 * @param string $message A message explaining what has been done incorrectly.
4056 * @param string $version The version of WordPress where the message was added.
4058 function _doing_it_wrong( $function, $message, $version ) {
4061 * Fires when the given function is being used incorrectly.
4065 * @param string $function The function that was called.
4066 * @param string $message A message explaining what has been done incorrectly.
4067 * @param string $version The version of WordPress where the message was added.
4069 do_action( 'doing_it_wrong_run', $function, $message, $version );
4072 * Filters whether to trigger an error for _doing_it_wrong() calls.
4076 * @param bool $trigger Whether to trigger the error for _doing_it_wrong() calls. Default true.
4078 if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
4079 if ( function_exists( '__' ) ) {
4080 if ( is_null( $version ) ) {
4083 /* translators: %s: version number */
4084 $version = sprintf( __( '(This message was added in version %s.)' ), $version );
4086 /* translators: %s: Codex URL */
4087 $message .= ' ' . sprintf( __( 'Please see <a href="%s">Debugging in WordPress</a> for more information.' ),
4088 __( 'https://codex.wordpress.org/Debugging_in_WordPress' )
4090 /* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message, 3: Version information message */
4091 trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
4093 if ( is_null( $version ) ) {
4096 $version = sprintf( '(This message was added in version %s.)', $version );
4098 $message .= sprintf( ' Please see <a href="%s">Debugging in WordPress</a> for more information.',
4099 'https://codex.wordpress.org/Debugging_in_WordPress'
4101 trigger_error( sprintf( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s', $function, $message, $version ) );
4107 * Is the server running earlier than 1.5.0 version of lighttpd?
4111 * @return bool Whether the server is running lighttpd < 1.5.0.
4113 function is_lighttpd_before_150() {
4114 $server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] )? $_SERVER['SERVER_SOFTWARE'] : '' );
4115 $server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : '';
4116 return 'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
4120 * Does the specified module exist in the Apache config?
4124 * @global bool $is_apache
4126 * @param string $mod The module, e.g. mod_rewrite.
4127 * @param bool $default Optional. The default return value if the module is not found. Default false.
4128 * @return bool Whether the specified module is loaded.
4130 function apache_mod_loaded($mod, $default = false) {
4136 if ( function_exists( 'apache_get_modules' ) ) {
4137 $mods = apache_get_modules();
4138 if ( in_array($mod, $mods) )
4140 } elseif ( function_exists( 'phpinfo' ) && false === strpos( ini_get( 'disable_functions' ), 'phpinfo' ) ) {
4143 $phpinfo = ob_get_clean();
4144 if ( false !== strpos($phpinfo, $mod) )
4151 * Check if IIS 7+ supports pretty permalinks.
4155 * @global bool $is_iis7
4157 * @return bool Whether IIS7 supports permalinks.
4159 function iis7_supports_permalinks() {
4162 $supports_permalinks = false;
4164 /* First we check if the DOMDocument class exists. If it does not exist, then we cannot
4165 * easily update the xml configuration file, hence we just bail out and tell user that
4166 * pretty permalinks cannot be used.
4168 * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
4169 * URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
4170 * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
4171 * via ISAPI then pretty permalinks will not work.
4173 $supports_permalinks = class_exists( 'DOMDocument', false ) && isset($_SERVER['IIS_UrlRewriteModule']) && ( PHP_SAPI == 'cgi-fcgi' );
4177 * Filters whether IIS 7+ supports pretty permalinks.
4181 * @param bool $supports_permalinks Whether IIS7 supports permalinks. Default false.
4183 return apply_filters( 'iis7_supports_permalinks', $supports_permalinks );
4187 * File validates against allowed set of defined rules.
4189 * A return value of '1' means that the $file contains either '..' or './'. A
4190 * return value of '2' means that the $file contains ':' after the first
4191 * character. A return value of '3' means that the file is not in the allowed
4196 * @param string $file File path.
4197 * @param array $allowed_files List of allowed files.
4198 * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
4200 function validate_file( $file, $allowed_files = '' ) {
4201 if ( false !== strpos( $file, '..' ) )
4204 if ( false !== strpos( $file, './' ) )
4207 if ( ! empty( $allowed_files ) && ! in_array( $file, $allowed_files ) )
4210 if (':' == substr( $file, 1, 1 ) )
4217 * Whether to force SSL used for the Administration Screens.
4221 * @staticvar bool $forced
4223 * @param string|bool $force Optional. Whether to force SSL in admin screens. Default null.
4224 * @return bool True if forced, false if not forced.
4226 function force_ssl_admin( $force = null ) {
4227 static $forced = false;
4229 if ( !is_null( $force ) ) {
4230 $old_forced = $forced;
4239 * Guess the URL for the site.
4241 * Will remove wp-admin links to retrieve only return URLs not in the wp-admin
4246 * @return string The guessed URL.
4248 function wp_guess_url() {
4249 if ( defined('WP_SITEURL') && '' != WP_SITEURL ) {
4252 $abspath_fix = str_replace( '\\', '/', ABSPATH );
4253 $script_filename_dir = dirname( $_SERVER['SCRIPT_FILENAME'] );
4255 // The request is for the admin
4256 if ( strpos( $_SERVER['REQUEST_URI'], 'wp-admin' ) !== false || strpos( $_SERVER['REQUEST_URI'], 'wp-login.php' ) !== false ) {
4257 $path = preg_replace( '#/(wp-admin/.*|wp-login.php)#i', '', $_SERVER['REQUEST_URI'] );
4259 // The request is for a file in ABSPATH
4260 } elseif ( $script_filename_dir . '/' == $abspath_fix ) {
4261 // Strip off any file/query params in the path
4262 $path = preg_replace( '#/[^/]*$#i', '', $_SERVER['PHP_SELF'] );
4265 if ( false !== strpos( $_SERVER['SCRIPT_FILENAME'], $abspath_fix ) ) {
4266 // Request is hitting a file inside ABSPATH
4267 $directory = str_replace( ABSPATH, '', $script_filename_dir );
4268 // Strip off the sub directory, and any file/query params
4269 $path = preg_replace( '#/' . preg_quote( $directory, '#' ) . '/[^/]*$#i', '' , $_SERVER['REQUEST_URI'] );
4270 } elseif ( false !== strpos( $abspath_fix, $script_filename_dir ) ) {
4271 // Request is hitting a file above ABSPATH
4272 $subdirectory = substr( $abspath_fix, strpos( $abspath_fix, $script_filename_dir ) + strlen( $script_filename_dir ) );
4273 // Strip off any file/query params from the path, appending the sub directory to the install
4274 $path = preg_replace( '#/[^/]*$#i', '' , $_SERVER['REQUEST_URI'] ) . $subdirectory;
4276 $path = $_SERVER['REQUEST_URI'];
4280 $schema = is_ssl() ? 'https://' : 'http://'; // set_url_scheme() is not defined yet
4281 $url = $schema . $_SERVER['HTTP_HOST'] . $path;
4284 return rtrim($url, '/');
4288 * Temporarily suspend cache additions.
4290 * Stops more data being added to the cache, but still allows cache retrieval.
4291 * This is useful for actions, such as imports, when a lot of data would otherwise
4292 * be almost uselessly added to the cache.
4294 * Suspension lasts for a single page load at most. Remember to call this
4295 * function again if you wish to re-enable cache adds earlier.
4299 * @staticvar bool $_suspend
4301 * @param bool $suspend Optional. Suspends additions if true, re-enables them if false.
4302 * @return bool The current suspend setting
4304 function wp_suspend_cache_addition( $suspend = null ) {
4305 static $_suspend = false;
4307 if ( is_bool( $suspend ) )
4308 $_suspend = $suspend;
4314 * Suspend cache invalidation.
4316 * Turns cache invalidation on and off. Useful during imports where you don't wont to do
4317 * invalidations every time a post is inserted. Callers must be sure that what they are
4318 * doing won't lead to an inconsistent cache when invalidation is suspended.
4322 * @global bool $_wp_suspend_cache_invalidation
4324 * @param bool $suspend Optional. Whether to suspend or enable cache invalidation. Default true.
4325 * @return bool The current suspend setting.
4327 function wp_suspend_cache_invalidation( $suspend = true ) {
4328 global $_wp_suspend_cache_invalidation;
4330 $current_suspend = $_wp_suspend_cache_invalidation;
4331 $_wp_suspend_cache_invalidation = $suspend;
4332 return $current_suspend;
4336 * Determine whether a site is the main site of the current network.
4340 * @param int $site_id Optional. Site ID to test. Defaults to current site.
4341 * @return bool True if $site_id is the main site of the network, or if not
4342 * running Multisite.
4344 function is_main_site( $site_id = null ) {
4345 if ( ! is_multisite() )
4349 $site_id = get_current_blog_id();
4351 return (int) $site_id === (int) get_network()->site_id;
4355 * Determine whether a network is the main network of the Multisite install.
4359 * @param int $network_id Optional. Network ID to test. Defaults to current network.
4360 * @return bool True if $network_id is the main network, or if not running Multisite.
4362 function is_main_network( $network_id = null ) {
4363 if ( ! is_multisite() ) {
4367 if ( null === $network_id ) {
4368 $network_id = get_current_network_id();
4371 $network_id = (int) $network_id;
4373 return ( $network_id === get_main_network_id() );
4377 * Get the main network ID.
4381 * @return int The ID of the main network.
4383 function get_main_network_id() {
4384 if ( ! is_multisite() ) {
4388 $current_network = get_network();
4390 if ( defined( 'PRIMARY_NETWORK_ID' ) ) {
4391 $main_network_id = PRIMARY_NETWORK_ID;
4392 } elseif ( isset( $current_network->id ) && 1 === (int) $current_network->id ) {
4393 // If the current network has an ID of 1, assume it is the main network.
4394 $main_network_id = 1;
4396 $_networks = get_networks( array( 'fields' => 'ids', 'number' => 1 ) );
4397 $main_network_id = array_shift( $_networks );
4401 * Filters the main network ID.
4405 * @param int $main_network_id The ID of the main network.
4407 return (int) apply_filters( 'get_main_network_id', $main_network_id );
4411 * Determine whether global terms are enabled.
4415 * @staticvar bool $global_terms
4417 * @return bool True if multisite and global terms enabled.
4419 function global_terms_enabled() {
4420 if ( ! is_multisite() )
4423 static $global_terms = null;
4424 if ( is_null( $global_terms ) ) {
4427 * Filters whether global terms are enabled.
4429 * Passing a non-null value to the filter will effectively short-circuit the function,
4430 * returning the value of the 'global_terms_enabled' site option instead.
4434 * @param null $enabled Whether global terms are enabled.
4436 $filter = apply_filters( 'global_terms_enabled', null );
4437 if ( ! is_null( $filter ) )
4438 $global_terms = (bool) $filter;
4440 $global_terms = (bool) get_site_option( 'global_terms_enabled', false );
4442 return $global_terms;
4446 * gmt_offset modification for smart timezone handling.
4448 * Overrides the gmt_offset option if we have a timezone_string available.
4452 * @return float|false Timezone GMT offset, false otherwise.
4454 function wp_timezone_override_offset() {
4455 if ( !$timezone_string = get_option( 'timezone_string' ) ) {
4459 $timezone_object = timezone_open( $timezone_string );
4460 $datetime_object = date_create();
4461 if ( false === $timezone_object || false === $datetime_object ) {
4464 return round( timezone_offset_get( $timezone_object, $datetime_object ) / HOUR_IN_SECONDS, 2 );
4468 * Sort-helper for timezones.
4477 function _wp_timezone_choice_usort_callback( $a, $b ) {
4478 // Don't use translated versions of Etc
4479 if ( 'Etc' === $a['continent'] && 'Etc' === $b['continent'] ) {
4480 // Make the order of these more like the old dropdown
4481 if ( 'GMT+' === substr( $a['city'], 0, 4 ) && 'GMT+' === substr( $b['city'], 0, 4 ) ) {
4482 return -1 * ( strnatcasecmp( $a['city'], $b['city'] ) );
4484 if ( 'UTC' === $a['city'] ) {
4485 if ( 'GMT+' === substr( $b['city'], 0, 4 ) ) {
4490 if ( 'UTC' === $b['city'] ) {
4491 if ( 'GMT+' === substr( $a['city'], 0, 4 ) ) {
4496 return strnatcasecmp( $a['city'], $b['city'] );
4498 if ( $a['t_continent'] == $b['t_continent'] ) {
4499 if ( $a['t_city'] == $b['t_city'] ) {
4500 return strnatcasecmp( $a['t_subcity'], $b['t_subcity'] );
4502 return strnatcasecmp( $a['t_city'], $b['t_city'] );
4504 // Force Etc to the bottom of the list
4505 if ( 'Etc' === $a['continent'] ) {
4508 if ( 'Etc' === $b['continent'] ) {
4511 return strnatcasecmp( $a['t_continent'], $b['t_continent'] );
4516 * Gives a nicely-formatted list of timezone strings.
4519 * @since 4.7.0 Added the `$locale` parameter.
4521 * @staticvar bool $mo_loaded
4522 * @staticvar string $locale_loaded
4524 * @param string $selected_zone Selected timezone.
4525 * @param string $locale Optional. Locale to load the timezones in. Default current site locale.
4528 function wp_timezone_choice( $selected_zone, $locale = null ) {
4529 static $mo_loaded = false, $locale_loaded = null;
4531 $continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific');
4533 // Load translations for continents and cities.
4534 if ( ! $mo_loaded || $locale !== $locale_loaded ) {
4535 $locale_loaded = $locale ? $locale : get_locale();
4536 $mofile = WP_LANG_DIR . '/continents-cities-' . $locale_loaded . '.mo';
4537 unload_textdomain( 'continents-cities' );
4538 load_textdomain( 'continents-cities', $mofile );
4543 foreach ( timezone_identifiers_list() as $zone ) {
4544 $zone = explode( '/', $zone );
4545 if ( !in_array( $zone[0], $continents ) ) {
4549 // This determines what gets set and translated - we don't translate Etc/* strings here, they are done later
4551 0 => ( isset( $zone[0] ) && $zone[0] ),
4552 1 => ( isset( $zone[1] ) && $zone[1] ),
4553 2 => ( isset( $zone[2] ) && $zone[2] ),
4555 $exists[3] = ( $exists[0] && 'Etc' !== $zone[0] );
4556 $exists[4] = ( $exists[1] && $exists[3] );
4557 $exists[5] = ( $exists[2] && $exists[3] );
4560 'continent' => ( $exists[0] ? $zone[0] : '' ),
4561 'city' => ( $exists[1] ? $zone[1] : '' ),
4562 'subcity' => ( $exists[2] ? $zone[2] : '' ),
4563 't_continent' => ( $exists[3] ? translate( str_replace( '_', ' ', $zone[0] ), 'continents-cities' ) : '' ),
4564 't_city' => ( $exists[4] ? translate( str_replace( '_', ' ', $zone[1] ), 'continents-cities' ) : '' ),
4565 't_subcity' => ( $exists[5] ? translate( str_replace( '_', ' ', $zone[2] ), 'continents-cities' ) : '' )
4568 usort( $zonen, '_wp_timezone_choice_usort_callback' );
4570 $structure = array();
4572 if ( empty( $selected_zone ) ) {
4573 $structure[] = '<option selected="selected" value="">' . __( 'Select a city' ) . '</option>';
4576 foreach ( $zonen as $key => $zone ) {
4577 // Build value in an array to join later
4578 $value = array( $zone['continent'] );
4580 if ( empty( $zone['city'] ) ) {
4581 // It's at the continent level (generally won't happen)
4582 $display = $zone['t_continent'];
4584 // It's inside a continent group
4586 // Continent optgroup
4587 if ( !isset( $zonen[$key - 1] ) || $zonen[$key - 1]['continent'] !== $zone['continent'] ) {
4588 $label = $zone['t_continent'];
4589 $structure[] = '<optgroup label="'. esc_attr( $label ) .'">';
4592 // Add the city to the value
4593 $value[] = $zone['city'];
4595 $display = $zone['t_city'];
4596 if ( !empty( $zone['subcity'] ) ) {
4597 // Add the subcity to the value
4598 $value[] = $zone['subcity'];
4599 $display .= ' - ' . $zone['t_subcity'];
4604 $value = join( '/', $value );
4606 if ( $value === $selected_zone ) {
4607 $selected = 'selected="selected" ';
4609 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $value ) . '">' . esc_html( $display ) . "</option>";
4611 // Close continent optgroup
4612 if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) {
4613 $structure[] = '</optgroup>';
4618 $structure[] = '<optgroup label="'. esc_attr__( 'UTC' ) .'">';
4620 if ( 'UTC' === $selected_zone )
4621 $selected = 'selected="selected" ';
4622 $structure[] = '<option ' . $selected . 'value="' . esc_attr( 'UTC' ) . '">' . __('UTC') . '</option>';
4623 $structure[] = '</optgroup>';
4625 // Do manual UTC offsets
4626 $structure[] = '<optgroup label="'. esc_attr__( 'Manual Offsets' ) .'">';
4627 $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,
4628 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);
4629 foreach ( $offset_range as $offset ) {
4631 $offset_name = '+' . $offset;
4633 $offset_name = (string) $offset;
4635 $offset_value = $offset_name;
4636 $offset_name = str_replace(array('.25','.5','.75'), array(':15',':30',':45'), $offset_name);
4637 $offset_name = 'UTC' . $offset_name;
4638 $offset_value = 'UTC' . $offset_value;
4640 if ( $offset_value === $selected_zone )
4641 $selected = 'selected="selected" ';
4642 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $offset_value ) . '">' . esc_html( $offset_name ) . "</option>";
4645 $structure[] = '</optgroup>';
4647 return join( "\n", $structure );
4651 * Strip close comment and close php tags from file headers used by WP.
4656 * @see https://core.trac.wordpress.org/ticket/8497
4658 * @param string $str Header comment to clean up.
4661 function _cleanup_header_comment( $str ) {
4662 return trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $str));
4666 * Permanently delete comments or posts of any type that have held a status
4667 * of 'trash' for the number of days defined in EMPTY_TRASH_DAYS.
4669 * The default value of `EMPTY_TRASH_DAYS` is 30 (days).
4673 * @global wpdb $wpdb WordPress database abstraction object.
4675 function wp_scheduled_delete() {
4678 $delete_timestamp = time() - ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );
4680 $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);
4682 foreach ( (array) $posts_to_delete as $post ) {
4683 $post_id = (int) $post['post_id'];
4687 $del_post = get_post($post_id);
4689 if ( !$del_post || 'trash' != $del_post->post_status ) {
4690 delete_post_meta($post_id, '_wp_trash_meta_status');
4691 delete_post_meta($post_id, '_wp_trash_meta_time');
4693 wp_delete_post($post_id);
4697 $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);
4699 foreach ( (array) $comments_to_delete as $comment ) {
4700 $comment_id = (int) $comment['comment_id'];
4704 $del_comment = get_comment($comment_id);
4706 if ( !$del_comment || 'trash' != $del_comment->comment_approved ) {
4707 delete_comment_meta($comment_id, '_wp_trash_meta_time');
4708 delete_comment_meta($comment_id, '_wp_trash_meta_status');
4710 wp_delete_comment( $del_comment );
4716 * Retrieve metadata from a file.
4718 * Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
4719 * Each piece of metadata must be on its own line. Fields can not span multiple
4720 * lines, the value will get cut at the end of the first line.
4722 * If the file data is not within that first 8kiB, then the author should correct
4723 * their plugin file and move the data headers to the top.
4725 * @link https://codex.wordpress.org/File_Header
4729 * @param string $file Path to the file.
4730 * @param array $default_headers List of headers, in the format array('HeaderKey' => 'Header Name').
4731 * @param string $context Optional. If specified adds filter hook {@see 'extra_$context_headers'}.
4733 * @return array Array of file headers in `HeaderKey => Header Value` format.
4735 function get_file_data( $file, $default_headers, $context = '' ) {
4736 // We don't need to write to the file, so just open for reading.
4737 $fp = fopen( $file, 'r' );
4739 // Pull only the first 8kiB of the file in.
4740 $file_data = fread( $fp, 8192 );
4742 // PHP will close file handle, but we are good citizens.
4745 // Make sure we catch CR-only line endings.
4746 $file_data = str_replace( "\r", "\n", $file_data );
4749 * Filters extra file headers by context.
4751 * The dynamic portion of the hook name, `$context`, refers to
4752 * the context where extra headers might be loaded.
4756 * @param array $extra_context_headers Empty array by default.
4758 if ( $context && $extra_headers = apply_filters( "extra_{$context}_headers", array() ) ) {
4759 $extra_headers = array_combine( $extra_headers, $extra_headers ); // keys equal values
4760 $all_headers = array_merge( $extra_headers, (array) $default_headers );
4762 $all_headers = $default_headers;
4765 foreach ( $all_headers as $field => $regex ) {
4766 if ( preg_match( '/^[ \t\/*#@]*' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, $match ) && $match[1] )
4767 $all_headers[ $field ] = _cleanup_header_comment( $match[1] );
4769 $all_headers[ $field ] = '';
4772 return $all_headers;
4778 * Useful for returning true to filters easily.
4782 * @see __return_false()
4784 * @return true True.
4786 function __return_true() {
4793 * Useful for returning false to filters easily.
4797 * @see __return_true()
4799 * @return false False.
4801 function __return_false() {
4808 * Useful for returning 0 to filters easily.
4814 function __return_zero() {
4819 * Returns an empty array.
4821 * Useful for returning an empty array to filters easily.
4825 * @return array Empty array.
4827 function __return_empty_array() {
4834 * Useful for returning null to filters easily.
4838 * @return null Null value.
4840 function __return_null() {
4845 * Returns an empty string.
4847 * Useful for returning an empty string to filters easily.
4851 * @see __return_null()
4853 * @return string Empty string.
4855 function __return_empty_string() {
4860 * Send a HTTP header to disable content type sniffing in browsers which support it.
4864 * @see https://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
4865 * @see https://src.chromium.org/viewvc/chrome?view=rev&revision=6985
4867 function send_nosniff_header() {
4868 @header( 'X-Content-Type-Options: nosniff' );
4872 * Return a MySQL expression for selecting the week number based on the start_of_week option.
4877 * @param string $column Database column.
4878 * @return string SQL clause.
4880 function _wp_mysql_week( $column ) {
4881 switch ( $start_of_week = (int) get_option( 'start_of_week' ) ) {
4883 return "WEEK( $column, 1 )";
4889 return "WEEK( DATE_SUB( $column, INTERVAL $start_of_week DAY ), 0 )";
4892 return "WEEK( $column, 0 )";
4897 * Find hierarchy loops using a callback function that maps object IDs to parent IDs.
4902 * @param callable $callback Function that accepts ( ID, $callback_args ) and outputs parent_ID.
4903 * @param int $start The ID to start the loop check at.
4904 * @param int $start_parent The parent_ID of $start to use instead of calling $callback( $start ).
4905 * Use null to always use $callback
4906 * @param array $callback_args Optional. Additional arguments to send to $callback.
4907 * @return array IDs of all members of loop.
4909 function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
4910 $override = is_null( $start_parent ) ? array() : array( $start => $start_parent );
4912 if ( !$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args ) )
4915 return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
4919 * Use the "The Tortoise and the Hare" algorithm to detect loops.
4921 * For every step of the algorithm, the hare takes two steps and the tortoise one.
4922 * If the hare ever laps the tortoise, there must be a loop.
4927 * @param callable $callback Function that accepts ( ID, callback_arg, ... ) and outputs parent_ID.
4928 * @param int $start The ID to start the loop check at.
4929 * @param array $override Optional. An array of ( ID => parent_ID, ... ) to use instead of $callback.
4930 * Default empty array.
4931 * @param array $callback_args Optional. Additional arguments to send to $callback. Default empty array.
4932 * @param bool $_return_loop Optional. Return loop members or just detect presence of loop? Only set
4933 * to true if you already know the given $start is part of a loop (otherwise
4934 * the returned array might include branches). Default false.
4935 * @return mixed Scalar ID of some arbitrary member of the loop, or array of IDs of all members of loop if
4938 function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) {
4939 $tortoise = $hare = $evanescent_hare = $start;
4942 // Set evanescent_hare to one past hare
4943 // Increment hare two steps
4947 ( $evanescent_hare = isset( $override[$hare] ) ? $override[$hare] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) )
4949 ( $hare = isset( $override[$evanescent_hare] ) ? $override[$evanescent_hare] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) )
4951 if ( $_return_loop )
4952 $return[$tortoise] = $return[$evanescent_hare] = $return[$hare] = true;
4954 // tortoise got lapped - must be a loop
4955 if ( $tortoise == $evanescent_hare || $tortoise == $hare )
4956 return $_return_loop ? $return : $tortoise;
4958 // Increment tortoise by one step
4959 $tortoise = isset( $override[$tortoise] ) ? $override[$tortoise] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) );
4966 * Send a HTTP header to limit rendering of pages to same origin iframes.
4970 * @see https://developer.mozilla.org/en/the_x-frame-options_response_header
4972 function send_frame_options_header() {
4973 @header( 'X-Frame-Options: SAMEORIGIN' );
4977 * Retrieve a list of protocols to allow in HTML attributes.
4980 * @since 4.3.0 Added 'webcal' to the protocols array.
4981 * @since 4.7.0 Added 'urn' to the protocols array.
4986 * @staticvar array $protocols
4988 * @return array Array of allowed protocols. Defaults to an array containing 'http', 'https',
4989 * 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet',
4990 * 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp', 'webcal', and 'urn'.
4992 function wp_allowed_protocols() {
4993 static $protocols = array();
4995 if ( empty( $protocols ) ) {
4996 $protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp', 'webcal', 'urn' );
4999 * Filters the list of protocols allowed in HTML attributes.
5003 * @param array $protocols Array of allowed protocols e.g. 'http', 'ftp', 'tel', and more.
5005 $protocols = apply_filters( 'kses_allowed_protocols', $protocols );
5012 * Return a comma-separated string of functions that have been called to get
5013 * to the current point in code.
5017 * @see https://core.trac.wordpress.org/ticket/19589
5019 * @param string $ignore_class Optional. A class to ignore all function calls within - useful
5020 * when you want to just give info about the callee. Default null.
5021 * @param int $skip_frames Optional. A number of stack frames to skip - useful for unwinding
5022 * back to the source of the issue. Default 0.
5023 * @param bool $pretty Optional. Whether or not you want a comma separated string or raw
5024 * array returned. Default true.
5025 * @return string|array Either a string containing a reversed comma separated trace or an array
5026 * of individual calls.
5028 function wp_debug_backtrace_summary( $ignore_class = null, $skip_frames = 0, $pretty = true ) {
5029 if ( version_compare( PHP_VERSION, '5.2.5', '>=' ) )
5030 $trace = debug_backtrace( false );
5032 $trace = debug_backtrace();
5035 $check_class = ! is_null( $ignore_class );
5036 $skip_frames++; // skip this function
5038 foreach ( $trace as $call ) {
5039 if ( $skip_frames > 0 ) {
5041 } elseif ( isset( $call['class'] ) ) {
5042 if ( $check_class && $ignore_class == $call['class'] )
5043 continue; // Filter out calls
5045 $caller[] = "{$call['class']}{$call['type']}{$call['function']}";
5047 if ( in_array( $call['function'], array( 'do_action', 'apply_filters' ) ) ) {
5048 $caller[] = "{$call['function']}('{$call['args'][0]}')";
5049 } elseif ( in_array( $call['function'], array( 'include', 'include_once', 'require', 'require_once' ) ) ) {
5050 $caller[] = $call['function'] . "('" . str_replace( array( WP_CONTENT_DIR, ABSPATH ) , '', $call['args'][0] ) . "')";
5052 $caller[] = $call['function'];
5057 return join( ', ', array_reverse( $caller ) );
5063 * Retrieve ids that are not already present in the cache.
5068 * @param array $object_ids ID list.
5069 * @param string $cache_key The cache bucket to check against.
5071 * @return array List of ids not present in the cache.
5073 function _get_non_cached_ids( $object_ids, $cache_key ) {
5075 foreach ( $object_ids as $id ) {
5077 if ( !wp_cache_get( $id, $cache_key ) ) {
5086 * Test if the current device has the capability to upload files.
5091 * @return bool Whether the device is able to upload files.
5093 function _device_can_upload() {
5094 if ( ! wp_is_mobile() )
5097 $ua = $_SERVER['HTTP_USER_AGENT'];
5099 if ( strpos($ua, 'iPhone') !== false
5100 || strpos($ua, 'iPad') !== false
5101 || strpos($ua, 'iPod') !== false ) {
5102 return preg_match( '#OS ([\d_]+) like Mac OS X#', $ua, $version ) && version_compare( $version[1], '6', '>=' );
5109 * Test if a given path is a stream URL
5111 * @param string $path The resource path or URL.
5112 * @return bool True if the path is a stream URL.
5114 function wp_is_stream( $path ) {
5115 $wrappers = stream_get_wrappers();
5116 $wrappers_re = '(' . join('|', $wrappers) . ')';
5118 return preg_match( "!^$wrappers_re://!", $path ) === 1;
5122 * Test if the supplied date is valid for the Gregorian calendar.
5128 * @param int $month Month number.
5129 * @param int $day Day number.
5130 * @param int $year Year number.
5131 * @param string $source_date The date to filter.
5132 * @return bool True if valid date, false if not valid date.
5134 function wp_checkdate( $month, $day, $year, $source_date ) {
5136 * Filters whether the given date is valid for the Gregorian calendar.
5140 * @param bool $checkdate Whether the given date is valid.
5141 * @param string $source_date Date to check.
5143 return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );
5147 * Load the auth check for monitoring whether the user is still logged in.
5149 * Can be disabled with remove_action( 'admin_enqueue_scripts', 'wp_auth_check_load' );
5151 * This is disabled for certain screens where a login screen could cause an
5152 * inconvenient interruption. A filter called {@see 'wp_auth_check_load'} can be used
5153 * for fine-grained control.
5157 function wp_auth_check_load() {
5158 if ( ! is_admin() && ! is_user_logged_in() )
5161 if ( defined( 'IFRAME_REQUEST' ) )
5164 $screen = get_current_screen();
5165 $hidden = array( 'update', 'update-network', 'update-core', 'update-core-network', 'upgrade', 'upgrade-network', 'network' );
5166 $show = ! in_array( $screen->id, $hidden );
5169 * Filters whether to load the authentication check.
5171 * Passing a falsey value to the filter will effectively short-circuit
5172 * loading the authentication check.
5176 * @param bool $show Whether to load the authentication check.
5177 * @param WP_Screen $screen The current screen object.
5179 if ( apply_filters( 'wp_auth_check_load', $show, $screen ) ) {
5180 wp_enqueue_style( 'wp-auth-check' );
5181 wp_enqueue_script( 'wp-auth-check' );
5183 add_action( 'admin_print_footer_scripts', 'wp_auth_check_html', 5 );
5184 add_action( 'wp_print_footer_scripts', 'wp_auth_check_html', 5 );
5189 * Output the HTML that shows the wp-login dialog when the user is no longer logged in.
5193 function wp_auth_check_html() {
5194 $login_url = wp_login_url();
5195 $current_domain = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'];
5196 $same_domain = ( strpos( $login_url, $current_domain ) === 0 );
5199 * Filters whether the authentication check originated at the same domain.
5203 * @param bool $same_domain Whether the authentication check originated at the same domain.
5205 $same_domain = apply_filters( 'wp_auth_check_same_domain', $same_domain );
5206 $wrap_class = $same_domain ? 'hidden' : 'hidden fallback';
5209 <div id="wp-auth-check-wrap" class="<?php echo $wrap_class; ?>">
5210 <div id="wp-auth-check-bg"></div>
5211 <div id="wp-auth-check">
5212 <button type="button" class="wp-auth-check-close button-link"><span class="screen-reader-text"><?php _e( 'Close dialog' ); ?></span></button>
5215 if ( $same_domain ) {
5217 <div id="wp-auth-check-form" class="loading" data-src="<?php echo esc_url( add_query_arg( array( 'interim-login' => 1 ), $login_url ) ); ?>"></div>
5222 <div class="wp-auth-fallback">
5223 <p><b class="wp-auth-fallback-expired" tabindex="0"><?php _e('Session expired'); ?></b></p>
5224 <p><a href="<?php echo esc_url( $login_url ); ?>" target="_blank"><?php _e('Please log in again.'); ?></a>
5225 <?php _e('The login page will open in a new window. After logging in you can close it and return to this page.'); ?></p>
5233 * Check whether a user is still logged in, for the heartbeat.
5235 * Send a result that shows a log-in box if the user is no longer logged in,
5236 * or if their cookie is within the grace period.
5240 * @global int $login_grace_period
5242 * @param array $response The Heartbeat response.
5243 * @return array $response The Heartbeat response with 'wp-auth-check' value set.
5245 function wp_auth_check( $response ) {
5246 $response['wp-auth-check'] = is_user_logged_in() && empty( $GLOBALS['login_grace_period'] );
5251 * Return RegEx body to liberally match an opening HTML tag.
5253 * Matches an opening HTML tag that:
5254 * 1. Is self-closing or
5255 * 2. Has no body but has a closing tag of the same name or
5256 * 3. Contains a body and a closing tag of the same name
5258 * Note: this RegEx does not balance inner tags and does not attempt
5259 * to produce valid HTML
5263 * @param string $tag An HTML tag name. Example: 'video'.
5264 * @return string Tag RegEx.
5266 function get_tag_regex( $tag ) {
5267 if ( empty( $tag ) )
5269 return sprintf( '<%1$s[^<]*(?:>[\s\S]*<\/%1$s>|\s*\/>)', tag_escape( $tag ) );
5273 * Retrieve a canonical form of the provided charset appropriate for passing to PHP
5274 * functions such as htmlspecialchars() and charset html attributes.
5279 * @see https://core.trac.wordpress.org/ticket/23688
5281 * @param string $charset A charset name.
5282 * @return string The canonical form of the charset.
5284 function _canonical_charset( $charset ) {
5285 if ( 'utf-8' === strtolower( $charset ) || 'utf8' === strtolower( $charset) ) {
5290 if ( 'iso-8859-1' === strtolower( $charset ) || 'iso8859-1' === strtolower( $charset ) ) {
5292 return 'ISO-8859-1';
5299 * Set the mbstring internal encoding to a binary safe encoding when func_overload
5302 * When mbstring.func_overload is in use for multi-byte encodings, the results from
5303 * strlen() and similar functions respect the utf8 characters, causing binary data
5304 * to return incorrect lengths.
5306 * This function overrides the mbstring encoding to a binary-safe encoding, and
5307 * resets it to the users expected encoding afterwards through the
5308 * `reset_mbstring_encoding` function.
5310 * It is safe to recursively call this function, however each
5311 * `mbstring_binary_safe_encoding()` call must be followed up with an equal number
5312 * of `reset_mbstring_encoding()` calls.
5316 * @see reset_mbstring_encoding()
5318 * @staticvar array $encodings
5319 * @staticvar bool $overloaded
5321 * @param bool $reset Optional. Whether to reset the encoding back to a previously-set encoding.
5324 function mbstring_binary_safe_encoding( $reset = false ) {
5325 static $encodings = array();
5326 static $overloaded = null;
5328 if ( is_null( $overloaded ) )
5329 $overloaded = function_exists( 'mb_internal_encoding' ) && ( ini_get( 'mbstring.func_overload' ) & 2 );
5331 if ( false === $overloaded )
5335 $encoding = mb_internal_encoding();
5336 array_push( $encodings, $encoding );
5337 mb_internal_encoding( 'ISO-8859-1' );
5340 if ( $reset && $encodings ) {
5341 $encoding = array_pop( $encodings );
5342 mb_internal_encoding( $encoding );
5347 * Reset the mbstring internal encoding to a users previously set encoding.
5349 * @see mbstring_binary_safe_encoding()
5353 function reset_mbstring_encoding() {
5354 mbstring_binary_safe_encoding( true );
5358 * Filter/validate a variable as a boolean.
5360 * Alternative to `filter_var( $var, FILTER_VALIDATE_BOOLEAN )`.
5364 * @param mixed $var Boolean value to validate.
5365 * @return bool Whether the value is validated.
5367 function wp_validate_boolean( $var ) {
5368 if ( is_bool( $var ) ) {
5372 if ( is_string( $var ) && 'false' === strtolower( $var ) ) {
5384 * @param string $file The path to the file to delete.
5386 function wp_delete_file( $file ) {
5388 * Filters the path of the file to delete.
5392 * @param string $medium Path to the file to delete.
5394 $delete = apply_filters( 'wp_delete_file', $file );
5395 if ( ! empty( $delete ) ) {
5401 * Outputs a small JS snippet on preview tabs/windows to remove `window.name` on unload.
5403 * This prevents reusing the same tab for a preview when the user has navigated away.
5407 function wp_post_preview_js() {
5410 if ( ! is_preview() || empty( $post ) ) {
5414 // Has to match the window name used in post_submit_meta_box()
5415 $name = 'wp-preview-' . (int) $post->ID;
5420 var query = document.location.search;
5422 if ( query && query.indexOf( 'preview=true' ) !== -1 ) {
5423 window.name = '<?php echo $name; ?>';
5426 if ( window.addEventListener ) {
5427 window.addEventListener( 'unload', function() { window.name = ''; }, false );
5435 * Parses and formats a MySQL datetime (Y-m-d H:i:s) for ISO8601/RFC3339.
5437 * Explicitly strips timezones, as datetimes are not saved with any timezone
5438 * information. Including any information on the offset could be misleading.
5442 * @param string $date_string Date string to parse and format.
5443 * @return string Date formatted for ISO8601/RFC3339.
5445 function mysql_to_rfc3339( $date_string ) {
5446 $formatted = mysql2date( 'c', $date_string, false );
5448 // Strip timezone information
5449 return preg_replace( '/(?:Z|[+-]\d{2}(?::\d{2})?)$/', '', $formatted );
5453 * Attempts to raise the PHP memory limit for memory intensive processes.
5455 * Only allows raising the existing limit and prevents lowering it.
5459 * @param string $context Optional. Context in which the function is called. Accepts either 'admin',
5460 * 'image', or an arbitrary other context. If an arbitrary context is passed,
5461 * the similarly arbitrary {@see '{$context}_memory_limit'} filter will be
5462 * invoked. Default 'admin'.
5463 * @return bool|int|string The limit that was set or false on failure.
5465 function wp_raise_memory_limit( $context = 'admin' ) {
5466 // Exit early if the limit cannot be changed.
5467 if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
5471 $current_limit = @ini_get( 'memory_limit' );
5472 $current_limit_int = wp_convert_hr_to_bytes( $current_limit );
5474 if ( -1 === $current_limit_int ) {
5478 $wp_max_limit = WP_MAX_MEMORY_LIMIT;
5479 $wp_max_limit_int = wp_convert_hr_to_bytes( $wp_max_limit );
5480 $filtered_limit = $wp_max_limit;
5482 switch ( $context ) {
5485 * Filters the maximum memory limit available for administration screens.
5487 * This only applies to administrators, who may require more memory for tasks
5488 * like updates. Memory limits when processing images (uploaded or edited by
5489 * users of any role) are handled separately.
5491 * The `WP_MAX_MEMORY_LIMIT` constant specifically defines the maximum memory
5492 * limit available when in the administration back end. The default is 256M
5493 * (256 megabytes of memory) or the original `memory_limit` php.ini value if
5497 * @since 4.6.0 The default now takes the original `memory_limit` into account.
5499 * @param int|string $filtered_limit The maximum WordPress memory limit. Accepts an integer
5500 * (bytes), or a shorthand string notation, such as '256M'.
5502 $filtered_limit = apply_filters( 'admin_memory_limit', $filtered_limit );
5507 * Filters the memory limit allocated for image manipulation.
5510 * @since 4.6.0 The default now takes the original `memory_limit` into account.
5512 * @param int|string $filtered_limit Maximum memory limit to allocate for images.
5513 * Default `WP_MAX_MEMORY_LIMIT` or the original
5514 * php.ini `memory_limit`, whichever is higher.
5515 * Accepts an integer (bytes), or a shorthand string
5516 * notation, such as '256M'.
5518 $filtered_limit = apply_filters( 'image_memory_limit', $filtered_limit );
5523 * Filters the memory limit allocated for arbitrary contexts.
5525 * The dynamic portion of the hook name, `$context`, refers to an arbitrary
5526 * context passed on calling the function. This allows for plugins to define
5527 * their own contexts for raising the memory limit.
5531 * @param int|string $filtered_limit Maximum memory limit to allocate for images.
5532 * Default '256M' or the original php.ini `memory_limit`,
5533 * whichever is higher. Accepts an integer (bytes), or a
5534 * shorthand string notation, such as '256M'.
5536 $filtered_limit = apply_filters( "{$context}_memory_limit", $filtered_limit );
5540 $filtered_limit_int = wp_convert_hr_to_bytes( $filtered_limit );
5542 if ( -1 === $filtered_limit_int || ( $filtered_limit_int > $wp_max_limit_int && $filtered_limit_int > $current_limit_int ) ) {
5543 if ( false !== @ini_set( 'memory_limit', $filtered_limit ) ) {
5544 return $filtered_limit;
5548 } elseif ( -1 === $wp_max_limit_int || $wp_max_limit_int > $current_limit_int ) {
5549 if ( false !== @ini_set( 'memory_limit', $wp_max_limit ) ) {
5550 return $wp_max_limit;
5560 * Generate a random UUID (version 4).
5564 * @return string UUID.
5566 function wp_generate_uuid4() {
5567 return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
5568 mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
5569 mt_rand( 0, 0xffff ),
5570 mt_rand( 0, 0x0fff ) | 0x4000,
5571 mt_rand( 0, 0x3fff ) | 0x8000,
5572 mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
5577 * Get last changed date for the specified cache group.
5581 * @param $group Where the cache contents are grouped.
5583 * @return string $last_changed UNIX timestamp with microseconds representing when the group was last changed.
5585 function wp_cache_get_last_changed( $group ) {
5586 $last_changed = wp_cache_get( 'last_changed', $group );
5588 if ( ! $last_changed ) {
5589 $last_changed = microtime();
5590 wp_cache_set( 'last_changed', $last_changed, $group );
5593 return $last_changed;