9 * Converts MySQL DATETIME field to user specified date format.
11 * If $dateformatstring has 'G' value, then gmmktime() function will be used to
12 * make the time. If $dateformatstring is set to 'U', then mktime() function
13 * will be used to make the time.
15 * The $translate will only be used, if it is set to true and it is by default
16 * and if the $wp_locale object has the month and weekday set.
20 * @param string $dateformatstring Either 'G', 'U', or php date format.
21 * @param string $mysqlstring Time from mysql DATETIME field.
22 * @param bool $translate Optional. Default is true. Will switch format to locale.
23 * @return string Date formated by $dateformatstring or locale (if available).
25 function mysql2date( $dateformatstring, $mysqlstring, $translate = true ) {
30 if ( 'G' == $dateformatstring )
31 return strtotime( $m . ' +0000' );
35 if ( 'U' == $dateformatstring )
39 return date_i18n( $dateformatstring, $i );
41 return date( $dateformatstring, $i );
45 * Retrieve the current time based on specified type.
47 * The 'mysql' type will return the time in the format for MySQL DATETIME field.
48 * The 'timestamp' type will return the current timestamp.
50 * If $gmt is set to either '1' or 'true', then both types will use GMT time.
51 * if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.
55 * @param string $type Either 'mysql' or 'timestamp'.
56 * @param int|bool $gmt Optional. Whether to use GMT timezone. Default is false.
57 * @return int|string String if $type is 'gmt', int if $type is 'timestamp'.
59 function current_time( $type, $gmt = 0 ) {
62 return ( $gmt ) ? gmdate( 'Y-m-d H:i:s' ) : gmdate( 'Y-m-d H:i:s', ( time() + ( get_option( 'gmt_offset' ) * 3600 ) ) );
65 return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * 3600 );
71 * Retrieve the date in localized format, based on timestamp.
73 * If the locale specifies the locale month and weekday, then the locale will
74 * take over the format for the date. If it isn't, then the date format string
75 * will be used instead.
79 * @param string $dateformatstring Format to display the date.
80 * @param int $unixtimestamp Optional. Unix timestamp.
81 * @param bool $gmt Optional, default is false. Whether to convert to GMT for time.
82 * @return string The date, translated if locale specifies it.
84 function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
90 $i = current_time( 'timestamp' );
93 // we should not let date() interfere with our
94 // specially computed timestamp
98 // store original value for language with untypical grammars
99 // see http://core.trac.wordpress.org/ticket/9396
100 $req_format = $dateformatstring;
102 $datefunc = $gmt? 'gmdate' : 'date';
104 if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
105 $datemonth = $wp_locale->get_month( $datefunc( 'm', $i ) );
106 $datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
107 $dateweekday = $wp_locale->get_weekday( $datefunc( 'w', $i ) );
108 $dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
109 $datemeridiem = $wp_locale->get_meridiem( $datefunc( 'a', $i ) );
110 $datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( 'A', $i ) );
111 $dateformatstring = ' '.$dateformatstring;
112 $dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
113 $dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );
114 $dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );
115 $dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
116 $dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );
117 $dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );
119 $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
121 $timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );
122 $timezone_formats_re = implode( '|', $timezone_formats );
123 if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {
124 $timezone_string = get_option( 'timezone_string' );
125 if ( $timezone_string ) {
126 $timezone_object = timezone_open( $timezone_string );
127 $date_object = date_create( null, $timezone_object );
128 foreach( $timezone_formats as $timezone_format ) {
129 if ( false !== strpos( $dateformatstring, $timezone_format ) ) {
130 $formatted = date_format( $date_object, $timezone_format );
131 $dateformatstring = ' '.$dateformatstring;
132 $dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );
133 $dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
138 $j = @$datefunc( $dateformatstring, $i );
139 // allow plugins to redo this entirely for languages with untypical grammars
140 $j = apply_filters('date_i18n', $j, $req_format, $i, $gmt);
145 * Convert integer number to format based on the locale.
149 * @param int $number The number to convert based on locale.
150 * @param int $decimals Precision of the number of decimal places.
151 * @return string Converted number in string format.
153 function number_format_i18n( $number, $decimals = 0 ) {
155 $formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
156 return apply_filters( 'number_format_i18n', $formatted );
160 * Convert number of bytes largest unit bytes will fit into.
162 * It is easier to read 1kB than 1024 bytes and 1MB than 1048576 bytes. Converts
163 * number of bytes to human readable number by taking the number of that unit
164 * that the bytes will go into it. Supports TB value.
166 * Please note that integers in PHP are limited to 32 bits, unless they are on
167 * 64 bit architecture, then they have 64 bit size. If you need to place the
168 * larger size then what PHP integer type will hold, then use a string. It will
169 * be converted to a double, which should always have 64 bit length.
171 * Technically the correct unit names for powers of 1024 are KiB, MiB etc.
172 * @link http://en.wikipedia.org/wiki/Byte
176 * @param int|string $bytes Number of bytes. Note max integer size for integers.
177 * @param int $decimals Precision of number of decimal places. Deprecated.
178 * @return bool|string False on failure. Number string on success.
180 function size_format( $bytes, $decimals = 0 ) {
182 // ========================= Origin ====
183 'TB' => 1099511627776, // pow( 1024, 4)
184 'GB' => 1073741824, // pow( 1024, 3)
185 'MB' => 1048576, // pow( 1024, 2)
186 'kB' => 1024, // pow( 1024, 1)
187 'B ' => 1, // pow( 1024, 0)
189 foreach ( $quant as $unit => $mag )
190 if ( doubleval($bytes) >= $mag )
191 return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
197 * Get the week start and end from the datetime or date string from mysql.
201 * @param string $mysqlstring Date or datetime field type from mysql.
202 * @param int $start_of_week Optional. Start of the week as an integer.
203 * @return array Keys are 'start' and 'end'.
205 function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
206 $my = substr( $mysqlstring, 0, 4 ); // Mysql string Year
207 $mm = substr( $mysqlstring, 8, 2 ); // Mysql string Month
208 $md = substr( $mysqlstring, 5, 2 ); // Mysql string day
209 $day = mktime( 0, 0, 0, $md, $mm, $my ); // The timestamp for mysqlstring day.
210 $weekday = date( 'w', $day ); // The day of the week from the timestamp
211 if ( !is_numeric($start_of_week) )
212 $start_of_week = get_option( 'start_of_week' );
214 if ( $weekday < $start_of_week )
217 $start = $day - 86400 * ( $weekday - $start_of_week ); // The most recent week start day on or before $day
218 $end = $start + 604799; // $start + 7 days - 1 second
219 return compact( 'start', 'end' );
223 * Unserialize value only if it was serialized.
227 * @param string $original Maybe unserialized original, if is needed.
228 * @return mixed Unserialized data can be any type.
230 function maybe_unserialize( $original ) {
231 if ( is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in
232 return @unserialize( $original );
237 * Check value to find if it was serialized.
239 * If $data is not an string, then returned value will always be false.
240 * Serialized data is always a string.
244 * @param mixed $data Value to check to see if was serialized.
245 * @return bool False if not serialized and true if it was.
247 function is_serialized( $data ) {
248 // if it isn't a string, it isn't serialized
249 if ( ! is_string( $data ) )
251 $data = trim( $data );
254 $length = strlen( $data );
257 if ( ':' !== $data[1] )
259 $lastc = $data[$length-1];
260 if ( ';' !== $lastc && '}' !== $lastc )
265 if ( '"' !== $data[$length-2] )
269 return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
273 return (bool) preg_match( "/^{$token}:[0-9.E-]+;\$/", $data );
279 * Check whether serialized data is of string type.
283 * @param mixed $data Serialized data
284 * @return bool False if not a serialized string, true if it is.
286 function is_serialized_string( $data ) {
287 // if it isn't a string, it isn't a serialized string
288 if ( !is_string( $data ) )
290 $data = trim( $data );
291 $length = strlen( $data );
294 elseif ( ':' !== $data[1] )
296 elseif ( ';' !== $data[$length-1] )
298 elseif ( $data[0] !== 's' )
300 elseif ( '"' !== $data[$length-2] )
307 * Retrieve option value based on name of option.
309 * If the option does not exist or does not have a value, then the return value
310 * will be false. This is useful to check whether you need to install an option
311 * and is commonly used during installation of plugin options and to test
312 * whether upgrading is required.
314 * If the option was serialized then it will be unserialized when it is returned.
319 * @uses apply_filters() Calls 'pre_option_$option' before checking the option.
320 * Any value other than false will "short-circuit" the retrieval of the option
321 * and return the returned value. You should not try to override special options,
322 * but you will not be prevented from doing so.
323 * @uses apply_filters() Calls 'option_$option', after checking the option, with
326 * @param string $option Name of option to retrieve. Expected to not be SQL-escaped.
327 * @return mixed Value set for the option.
329 function get_option( $option, $default = false ) {
332 // Allow plugins to short-circuit options.
333 $pre = apply_filters( 'pre_option_' . $option, false );
334 if ( false !== $pre )
337 $option = trim($option);
338 if ( empty($option) )
341 if ( defined( 'WP_SETUP_CONFIG' ) )
344 if ( ! defined( 'WP_INSTALLING' ) ) {
345 // prevent non-existent options from triggering multiple queries
346 $notoptions = wp_cache_get( 'notoptions', 'options' );
347 if ( isset( $notoptions[$option] ) )
350 $alloptions = wp_load_alloptions();
352 if ( isset( $alloptions[$option] ) ) {
353 $value = $alloptions[$option];
355 $value = wp_cache_get( $option, 'options' );
357 if ( false === $value ) {
358 $row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", $option ) );
360 // Has to be get_row instead of get_var because of funkiness with 0, false, null values
361 if ( is_object( $row ) ) {
362 $value = $row->option_value;
363 wp_cache_add( $option, $value, 'options' );
364 } else { // option does not exist, so we must cache its non-existence
365 $notoptions[$option] = true;
366 wp_cache_set( 'notoptions', $notoptions, 'options' );
372 $suppress = $wpdb->suppress_errors();
373 $row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", $option ) );
374 $wpdb->suppress_errors( $suppress );
375 if ( is_object( $row ) )
376 $value = $row->option_value;
381 // If home is not set use siteurl.
382 if ( 'home' == $option && '' == $value )
383 return get_option( 'siteurl' );
385 if ( in_array( $option, array('siteurl', 'home', 'category_base', 'tag_base') ) )
386 $value = untrailingslashit( $value );
388 return apply_filters( 'option_' . $option, maybe_unserialize( $value ) );
392 * Protect WordPress special option from being modified.
394 * Will die if $option is in protected list. Protected options are 'alloptions'
395 * and 'notoptions' options.
401 * @param string $option Option name.
403 function wp_protect_special_option( $option ) {
404 $protected = array( 'alloptions', 'notoptions' );
405 if ( in_array( $option, $protected ) )
406 wp_die( sprintf( __( '%s is a protected WP option and may not be modified' ), esc_html( $option ) ) );
410 * Print option value after sanitizing for forms.
412 * @uses attr Sanitizes value.
417 * @param string $option Option name.
419 function form_option( $option ) {
420 echo esc_attr( get_option( $option ) );
424 * Loads and caches all autoloaded options, if available or all options.
430 * @return array List of all options.
432 function wp_load_alloptions() {
435 if ( !defined( 'WP_INSTALLING' ) || !is_multisite() )
436 $alloptions = wp_cache_get( 'alloptions', 'options' );
440 if ( !$alloptions ) {
441 $suppress = $wpdb->suppress_errors();
442 if ( !$alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE autoload = 'yes'" ) )
443 $alloptions_db = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options" );
444 $wpdb->suppress_errors($suppress);
445 $alloptions = array();
446 foreach ( (array) $alloptions_db as $o ) {
447 $alloptions[$o->option_name] = $o->option_value;
449 if ( !defined( 'WP_INSTALLING' ) || !is_multisite() )
450 wp_cache_add( 'alloptions', $alloptions, 'options' );
457 * Loads and caches certain often requested site options if is_multisite() and a peristent cache is not being used.
463 * @param int $site_id Optional site ID for which to query the options. Defaults to the current site.
465 function wp_load_core_site_options( $site_id = null ) {
466 global $wpdb, $_wp_using_ext_object_cache;
468 if ( !is_multisite() || $_wp_using_ext_object_cache || defined( 'WP_INSTALLING' ) )
471 if ( empty($site_id) )
472 $site_id = $wpdb->siteid;
474 $core_options = array('site_name', 'siteurl', 'active_sitewide_plugins', '_site_transient_timeout_theme_roots', '_site_transient_theme_roots', 'site_admins', 'can_compress_scripts', 'global_terms_enabled' );
476 $core_options_in = "'" . implode("', '", $core_options) . "'";
477 $options = $wpdb->get_results( $wpdb->prepare("SELECT meta_key, meta_value FROM $wpdb->sitemeta WHERE meta_key IN ($core_options_in) AND site_id = %d", $site_id) );
479 foreach ( $options as $option ) {
480 $key = $option->meta_key;
481 $cache_key = "{$site_id}:$key";
482 $option->meta_value = maybe_unserialize( $option->meta_value );
484 wp_cache_set( $cache_key, $option->meta_value, 'site-options' );
489 * Update the value of an option that was already added.
491 * You do not need to serialize values. If the value needs to be serialized, then
492 * it will be serialized before it is inserted into the database. Remember,
493 * resources can not be serialized or added as an option.
495 * If the option does not exist, then the option will be added with the option
496 * value, but you will not be able to set whether it is autoloaded. If you want
497 * to set whether an option is autoloaded, then you need to use the add_option().
503 * @uses apply_filters() Calls 'pre_update_option_$option' hook to allow overwriting the
504 * option value to be stored.
505 * @uses do_action() Calls 'update_option' hook before updating the option.
506 * @uses do_action() Calls 'update_option_$option' and 'updated_option' hooks on success.
508 * @param string $option Option name. Expected to not be SQL-escaped.
509 * @param mixed $newvalue Option value. Expected to not be SQL-escaped.
510 * @return bool False if value was not updated and true if value was updated.
512 function update_option( $option, $newvalue ) {
515 $option = trim($option);
516 if ( empty($option) )
519 wp_protect_special_option( $option );
521 if ( is_object($newvalue) )
522 $newvalue = clone $newvalue;
524 $newvalue = sanitize_option( $option, $newvalue );
525 $oldvalue = get_option( $option );
526 $newvalue = apply_filters( 'pre_update_option_' . $option, $newvalue, $oldvalue );
528 // If the new and old values are the same, no need to update.
529 if ( $newvalue === $oldvalue )
532 if ( false === $oldvalue )
533 return add_option( $option, $newvalue );
535 $notoptions = wp_cache_get( 'notoptions', 'options' );
536 if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) {
537 unset( $notoptions[$option] );
538 wp_cache_set( 'notoptions', $notoptions, 'options' );
541 $_newvalue = $newvalue;
542 $newvalue = maybe_serialize( $newvalue );
544 do_action( 'update_option', $option, $oldvalue, $_newvalue );
545 if ( ! defined( 'WP_INSTALLING' ) ) {
546 $alloptions = wp_load_alloptions();
547 if ( isset( $alloptions[$option] ) ) {
548 $alloptions[$option] = $_newvalue;
549 wp_cache_set( 'alloptions', $alloptions, 'options' );
551 wp_cache_set( $option, $_newvalue, 'options' );
555 $result = $wpdb->update( $wpdb->options, array( 'option_value' => $newvalue ), array( 'option_name' => $option ) );
558 do_action( "update_option_{$option}", $oldvalue, $_newvalue );
559 do_action( 'updated_option', $option, $oldvalue, $_newvalue );
568 * You do not need to serialize values. If the value needs to be serialized, then
569 * it will be serialized before it is inserted into the database. Remember,
570 * resources can not be serialized or added as an option.
572 * You can create options without values and then add values later. Does not
573 * check whether the option has already been added, but does check that you
574 * aren't adding a protected WordPress option. Care should be taken to not name
575 * options the same as the ones which are protected and to not add options
576 * that were already added.
582 * @uses do_action() Calls 'add_option' hook before adding the option.
583 * @uses do_action() Calls 'add_option_$option' and 'added_option' hooks on success.
585 * @param string $option Name of option to add. Expected to not be SQL-escaped.
586 * @param mixed $value Optional. Option value, can be anything. Expected to not be SQL-escaped.
587 * @param mixed $deprecated Optional. Description. Not used anymore.
588 * @param bool $autoload Optional. Default is enabled. Whether to load the option when WordPress starts up.
589 * @return null returns when finished.
591 function add_option( $option, $value = '', $deprecated = '', $autoload = 'yes' ) {
594 if ( !empty( $deprecated ) )
595 _deprecated_argument( __FUNCTION__, '2.3' );
597 $option = trim($option);
598 if ( empty($option) )
601 wp_protect_special_option( $option );
603 if ( is_object($value) )
604 $value = clone $value;
606 $value = sanitize_option( $option, $value );
608 // Make sure the option doesn't already exist. We can check the 'notoptions' cache before we ask for a db query
609 $notoptions = wp_cache_get( 'notoptions', 'options' );
610 if ( !is_array( $notoptions ) || !isset( $notoptions[$option] ) )
611 if ( false !== get_option( $option ) )
615 $value = maybe_serialize( $value );
616 $autoload = ( 'no' === $autoload ) ? 'no' : 'yes';
617 do_action( 'add_option', $option, $_value );
618 if ( ! defined( 'WP_INSTALLING' ) ) {
619 if ( 'yes' == $autoload ) {
620 $alloptions = wp_load_alloptions();
621 $alloptions[$option] = $value;
622 wp_cache_set( 'alloptions', $alloptions, 'options' );
624 wp_cache_set( $option, $value, 'options' );
628 // This option exists now
629 $notoptions = wp_cache_get( 'notoptions', 'options' ); // yes, again... we need it to be fresh
630 if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) {
631 unset( $notoptions[$option] );
632 wp_cache_set( 'notoptions', $notoptions, 'options' );
635 $result = $wpdb->query( $wpdb->prepare( "INSERT INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, %s) ON DUPLICATE KEY UPDATE `option_name` = VALUES(`option_name`), `option_value` = VALUES(`option_value`), `autoload` = VALUES(`autoload`)", $option, $value, $autoload ) );
638 do_action( "add_option_{$option}", $option, $_value );
639 do_action( 'added_option', $option, $_value );
646 * Removes option by name. Prevents removal of protected WordPress options.
652 * @uses do_action() Calls 'delete_option' hook before option is deleted.
653 * @uses do_action() Calls 'deleted_option' and 'delete_option_$option' hooks on success.
655 * @param string $option Name of option to remove. Expected to not be SQL-escaped.
656 * @return bool True, if option is successfully deleted. False on failure.
658 function delete_option( $option ) {
661 wp_protect_special_option( $option );
663 // Get the ID, if no ID then return
664 $row = $wpdb->get_row( $wpdb->prepare( "SELECT autoload FROM $wpdb->options WHERE option_name = %s", $option ) );
665 if ( is_null( $row ) )
667 do_action( 'delete_option', $option );
668 $result = $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->options WHERE option_name = %s", $option) );
669 if ( ! defined( 'WP_INSTALLING' ) ) {
670 if ( 'yes' == $row->autoload ) {
671 $alloptions = wp_load_alloptions();
672 if ( is_array( $alloptions ) && isset( $alloptions[$option] ) ) {
673 unset( $alloptions[$option] );
674 wp_cache_set( 'alloptions', $alloptions, 'options' );
677 wp_cache_delete( $option, 'options' );
681 do_action( "delete_option_$option", $option );
682 do_action( 'deleted_option', $option );
693 * @subpackage Transient
695 * @uses do_action() Calls 'delete_transient_$transient' hook before transient is deleted.
696 * @uses do_action() Calls 'deleted_transient' hook on success.
698 * @param string $transient Transient name. Expected to not be SQL-escaped.
699 * @return bool true if successful, false otherwise
701 function delete_transient( $transient ) {
702 global $_wp_using_ext_object_cache;
704 do_action( 'delete_transient_' . $transient, $transient );
706 if ( $_wp_using_ext_object_cache ) {
707 $result = wp_cache_delete( $transient, 'transient' );
709 $option_timeout = '_transient_timeout_' . $transient;
710 $option = '_transient_' . $transient;
711 $result = delete_option( $option );
713 delete_option( $option_timeout );
717 do_action( 'deleted_transient', $transient );
722 * Get the value of a transient
724 * If the transient does not exist or does not have a value, then the return value
727 * @uses apply_filters() Calls 'pre_transient_$transient' hook before checking the transient.
728 * Any value other than false will "short-circuit" the retrieval of the transient
729 * and return the returned value.
730 * @uses apply_filters() Calls 'transient_$option' hook, after checking the transient, with
731 * the transient value.
735 * @subpackage Transient
737 * @param string $transient Transient name. Expected to not be SQL-escaped
738 * @return mixed Value of transient
740 function get_transient( $transient ) {
741 global $_wp_using_ext_object_cache;
743 $pre = apply_filters( 'pre_transient_' . $transient, false );
744 if ( false !== $pre )
747 if ( $_wp_using_ext_object_cache ) {
748 $value = wp_cache_get( $transient, 'transient' );
750 $transient_option = '_transient_' . $transient;
751 if ( ! defined( 'WP_INSTALLING' ) ) {
752 // If option is not in alloptions, it is not autoloaded and thus has a timeout
753 $alloptions = wp_load_alloptions();
754 if ( !isset( $alloptions[$transient_option] ) ) {
755 $transient_timeout = '_transient_timeout_' . $transient;
756 if ( get_option( $transient_timeout ) < time() ) {
757 delete_option( $transient_option );
758 delete_option( $transient_timeout );
764 $value = get_option( $transient_option );
767 return apply_filters( 'transient_' . $transient, $value );
771 * Set/update the value of a transient
773 * You do not need to serialize values. If the value needs to be serialized, then
774 * it will be serialized before it is set.
778 * @subpackage Transient
780 * @uses apply_filters() Calls 'pre_set_transient_$transient' hook to allow overwriting the
781 * transient value to be stored.
782 * @uses do_action() Calls 'set_transient_$transient' and 'setted_transient' hooks on success.
784 * @param string $transient Transient name. Expected to not be SQL-escaped.
785 * @param mixed $value Transient value. Expected to not be SQL-escaped.
786 * @param int $expiration Time until expiration in seconds, default 0
787 * @return bool False if value was not set and true if value was set.
789 function set_transient( $transient, $value, $expiration = 0 ) {
790 global $_wp_using_ext_object_cache;
792 $value = apply_filters( 'pre_set_transient_' . $transient, $value );
794 if ( $_wp_using_ext_object_cache ) {
795 $result = wp_cache_set( $transient, $value, 'transient', $expiration );
797 $transient_timeout = '_transient_timeout_' . $transient;
798 $transient = '_transient_' . $transient;
799 if ( false === get_option( $transient ) ) {
803 add_option( $transient_timeout, time() + $expiration, '', 'no' );
805 $result = add_option( $transient, $value, '', $autoload );
808 update_option( $transient_timeout, time() + $expiration );
809 $result = update_option( $transient, $value );
813 do_action( 'set_transient_' . $transient );
814 do_action( 'setted_transient', $transient );
820 * Saves and restores user interface settings stored in a cookie.
822 * Checks if the current user-settings cookie is updated and stores it. When no
823 * cookie exists (different browser used), adds the last saved cookie restoring
830 function wp_user_settings() {
835 if ( defined('DOING_AJAX') )
838 if ( ! $user = wp_get_current_user() )
841 $settings = get_user_option( 'user-settings', $user->ID );
843 if ( isset( $_COOKIE['wp-settings-' . $user->ID] ) ) {
844 $cookie = preg_replace( '/[^A-Za-z0-9=&_]/', '', $_COOKIE['wp-settings-' . $user->ID] );
846 if ( ! empty( $cookie ) && strpos( $cookie, '=' ) ) {
847 if ( $cookie == $settings )
850 $last_time = (int) get_user_option( 'user-settings-time', $user->ID );
851 $saved = isset( $_COOKIE['wp-settings-time-' . $user->ID]) ? preg_replace( '/[^0-9]/', '', $_COOKIE['wp-settings-time-' . $user->ID] ) : 0;
853 if ( $saved > $last_time ) {
854 update_user_option( $user->ID, 'user-settings', $cookie, false );
855 update_user_option( $user->ID, 'user-settings-time', time() - 5, false );
861 setcookie( 'wp-settings-' . $user->ID, $settings, time() + 31536000, SITECOOKIEPATH );
862 setcookie( 'wp-settings-time-' . $user->ID, time(), time() + 31536000, SITECOOKIEPATH );
863 $_COOKIE['wp-settings-' . $user->ID] = $settings;
867 * Retrieve user interface setting value based on setting name.
873 * @param string $name The name of the setting.
874 * @param string $default Optional default value to return when $name is not set.
875 * @return mixed the last saved user setting or the default value/false if it doesn't exist.
877 function get_user_setting( $name, $default = false ) {
879 $all = get_all_user_settings();
881 return isset($all[$name]) ? $all[$name] : $default;
885 * Add or update user interface setting.
887 * Both $name and $value can contain only ASCII letters, numbers and underscores.
888 * This function has to be used before any output has started as it calls setcookie().
894 * @param string $name The name of the setting.
895 * @param string $value The value for the setting.
896 * @return bool true if set successfully/false if not.
898 function set_user_setting( $name, $value ) {
900 if ( headers_sent() )
903 $all = get_all_user_settings();
904 $name = preg_replace( '/[^A-Za-z0-9_]+/', '', $name );
909 $all[$name] = $value;
911 return wp_set_all_user_settings($all);
915 * Delete user interface settings.
917 * Deleting settings would reset them to the defaults.
918 * This function has to be used before any output has started as it calls setcookie().
924 * @param mixed $names The name or array of names of the setting to be deleted.
925 * @return bool true if deleted successfully/false if not.
927 function delete_user_setting( $names ) {
929 if ( headers_sent() )
932 $all = get_all_user_settings();
933 $names = (array) $names;
935 foreach ( $names as $name ) {
936 if ( isset($all[$name]) ) {
942 if ( isset($deleted) )
943 return wp_set_all_user_settings($all);
949 * Retrieve all user interface settings.
955 * @return array the last saved user settings or empty array.
957 function get_all_user_settings() {
958 global $_updated_user_settings;
960 if ( ! $user = wp_get_current_user() )
963 if ( isset($_updated_user_settings) && is_array($_updated_user_settings) )
964 return $_updated_user_settings;
967 if ( isset($_COOKIE['wp-settings-' . $user->ID]) ) {
968 $cookie = preg_replace( '/[^A-Za-z0-9=&_]/', '', $_COOKIE['wp-settings-' . $user->ID] );
970 if ( $cookie && strpos($cookie, '=') ) // the '=' cannot be 1st char
971 parse_str($cookie, $all);
974 $option = get_user_option('user-settings', $user->ID);
975 if ( $option && is_string($option) )
976 parse_str( $option, $all );
983 * Private. Set all user interface settings.
989 * @param unknown $all
992 function wp_set_all_user_settings($all) {
993 global $_updated_user_settings;
995 if ( ! $user = wp_get_current_user() )
998 $_updated_user_settings = $all;
1000 foreach ( $all as $k => $v ) {
1001 $v = preg_replace( '/[^A-Za-z0-9_]+/', '', $v );
1002 $settings .= $k . '=' . $v . '&';
1005 $settings = rtrim($settings, '&');
1007 update_user_option( $user->ID, 'user-settings', $settings, false );
1008 update_user_option( $user->ID, 'user-settings-time', time(), false );
1014 * Delete the user settings of the current user.
1016 * @package WordPress
1017 * @subpackage Option
1020 function delete_all_user_settings() {
1021 if ( ! $user = wp_get_current_user() )
1024 update_user_option( $user->ID, 'user-settings', '', false );
1025 setcookie('wp-settings-' . $user->ID, ' ', time() - 31536000, SITECOOKIEPATH);
1029 * Serialize data, if needed.
1033 * @param mixed $data Data that might be serialized.
1034 * @return mixed A scalar data
1036 function maybe_serialize( $data ) {
1037 if ( is_array( $data ) || is_object( $data ) )
1038 return serialize( $data );
1040 if ( is_serialized( $data ) )
1041 return serialize( $data );
1047 * Retrieve post title from XMLRPC XML.
1049 * If the title element is not part of the XML, then the default post title from
1050 * the $post_default_title will be used instead.
1052 * @package WordPress
1053 * @subpackage XMLRPC
1056 * @global string $post_default_title Default XMLRPC post title.
1058 * @param string $content XMLRPC XML Request content
1059 * @return string Post title
1061 function xmlrpc_getposttitle( $content ) {
1062 global $post_default_title;
1063 if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {
1064 $post_title = $matchtitle[1];
1066 $post_title = $post_default_title;
1072 * Retrieve the post category or categories from XMLRPC XML.
1074 * If the category element is not found, then the default post category will be
1075 * used. The return type then would be what $post_default_category. If the
1076 * category is found, then it will always be an array.
1078 * @package WordPress
1079 * @subpackage XMLRPC
1082 * @global string $post_default_category Default XMLRPC post category.
1084 * @param string $content XMLRPC XML Request content
1085 * @return string|array List of categories or category name.
1087 function xmlrpc_getpostcategory( $content ) {
1088 global $post_default_category;
1089 if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {
1090 $post_category = trim( $matchcat[1], ',' );
1091 $post_category = explode( ',', $post_category );
1093 $post_category = $post_default_category;
1095 return $post_category;
1099 * XMLRPC XML content without title and category elements.
1101 * @package WordPress
1102 * @subpackage XMLRPC
1105 * @param string $content XMLRPC XML Request content
1106 * @return string XMLRPC XML Request content without title and category elements.
1108 function xmlrpc_removepostdata( $content ) {
1109 $content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );
1110 $content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );
1111 $content = trim( $content );
1116 * Open the file handle for debugging.
1118 * This function is used for XMLRPC feature, but it is general purpose enough
1119 * to be used in anywhere.
1121 * @see fopen() for mode options.
1122 * @package WordPress
1125 * @uses $debug Used for whether debugging is enabled.
1127 * @param string $filename File path to debug file.
1128 * @param string $mode Same as fopen() mode parameter.
1129 * @return bool|resource File handle. False on failure.
1131 function debug_fopen( $filename, $mode ) {
1133 if ( 1 == $debug ) {
1134 $fp = fopen( $filename, $mode );
1142 * Write contents to the file used for debugging.
1144 * Technically, this can be used to write to any file handle when the global
1145 * $debug is set to 1 or true.
1147 * @package WordPress
1150 * @uses $debug Used for whether debugging is enabled.
1152 * @param resource $fp File handle for debugging file.
1153 * @param string $string Content to write to debug file.
1155 function debug_fwrite( $fp, $string ) {
1158 fwrite( $fp, $string );
1162 * Close the debugging file handle.
1164 * Technically, this can be used to close any file handle when the global $debug
1165 * is set to 1 or true.
1167 * @package WordPress
1170 * @uses $debug Used for whether debugging is enabled.
1172 * @param resource $fp Debug File handle.
1174 function debug_fclose( $fp ) {
1181 * Check content for video and audio links to add as enclosures.
1183 * Will not add enclosures that have already been added and will
1184 * remove enclosures that are no longer in the post. This is called as
1185 * pingbacks and trackbacks.
1187 * @package WordPress
1192 * @param string $content Post Content
1193 * @param int $post_ID Post ID
1195 function do_enclose( $content, $post_ID ) {
1198 //TODO: Tidy this ghetto code up and make the debug code optional
1199 include_once( ABSPATH . WPINC . '/class-IXR.php' );
1201 $log = debug_fopen( ABSPATH . 'enclosures.log', 'a' );
1202 $post_links = array();
1203 debug_fwrite( $log, 'BEGIN ' . date( 'YmdHis', time() ) . "\n" );
1205 $pung = get_enclosed( $post_ID );
1208 $gunk = '/#~:.?+=&%@!\-';
1210 $any = $ltrs . $gunk . $punc;
1212 preg_match_all( "{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp );
1214 debug_fwrite( $log, 'Post contents:' );
1215 debug_fwrite( $log, $content . "\n" );
1217 foreach ( $pung as $link_test ) {
1218 if ( !in_array( $link_test, $post_links_temp[0] ) ) { // link no longer in post
1219 $mid = $wpdb->get_col( $wpdb->prepare("SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $link_test ) . '%') );
1220 do_action( 'delete_postmeta', $mid );
1221 $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id IN(%s)", implode( ',', $mid ) ) );
1222 do_action( 'deleted_postmeta', $mid );
1226 foreach ( (array) $post_links_temp[0] as $link_test ) {
1227 if ( !in_array( $link_test, $pung ) ) { // If we haven't pung it already
1228 $test = @parse_url( $link_test );
1229 if ( false === $test )
1231 if ( isset( $test['query'] ) )
1232 $post_links[] = $link_test;
1233 elseif ( isset($test['path']) && ( $test['path'] != '/' ) && ($test['path'] != '' ) )
1234 $post_links[] = $link_test;
1238 foreach ( (array) $post_links as $url ) {
1239 if ( $url != '' && !$wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE (%s)", $post_ID, like_escape( $url ) . '%' ) ) ) {
1241 if ( $headers = wp_get_http_headers( $url) ) {
1242 $len = (int) $headers['content-length'];
1243 $type = $headers['content-type'];
1244 $allowed_types = array( 'video', 'audio' );
1246 // Check to see if we can figure out the mime type from
1248 $url_parts = @parse_url( $url );
1249 if ( false !== $url_parts ) {
1250 $extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );
1251 if ( !empty( $extension ) ) {
1252 foreach ( get_allowed_mime_types( ) as $exts => $mime ) {
1253 if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
1261 if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {
1262 $meta_value = "$url\n$len\n$type\n";
1263 $wpdb->insert($wpdb->postmeta, array('post_id' => $post_ID, 'meta_key' => 'enclosure', 'meta_value' => $meta_value) );
1264 do_action( 'added_postmeta', $wpdb->insert_id, $post_ID, 'enclosure', $meta_value );
1272 * Perform a HTTP HEAD or GET request.
1274 * If $file_path is a writable filename, this will do a GET request and write
1275 * the file to that path.
1279 * @param string $url URL to fetch.
1280 * @param string|bool $file_path Optional. File path to write request to.
1281 * @param int $red (private) The number of Redirects followed, Upon 5 being hit, returns false.
1282 * @return bool|string False on failure and string of headers if HEAD request.
1284 function wp_get_http( $url, $file_path = false, $red = 1 ) {
1285 @set_time_limit( 60 );
1291 $options['redirection'] = 5;
1293 if ( false == $file_path )
1294 $options['method'] = 'HEAD';
1296 $options['method'] = 'GET';
1298 $response = wp_remote_request($url, $options);
1300 if ( is_wp_error( $response ) )
1303 $headers = wp_remote_retrieve_headers( $response );
1304 $headers['response'] = wp_remote_retrieve_response_code( $response );
1306 // WP_HTTP no longer follows redirects for HEAD requests.
1307 if ( 'HEAD' == $options['method'] && in_array($headers['response'], array(301, 302)) && isset( $headers['location'] ) ) {
1308 return wp_get_http( $headers['location'], $file_path, ++$red );
1311 if ( false == $file_path )
1314 // GET request - write it to the supplied filename
1315 $out_fp = fopen($file_path, 'w');
1319 fwrite( $out_fp, wp_remote_retrieve_body( $response ) );
1327 * Retrieve HTTP Headers from URL.
1331 * @param string $url
1332 * @param bool $deprecated Not Used.
1333 * @return bool|string False on failure, headers on success.
1335 function wp_get_http_headers( $url, $deprecated = false ) {
1336 if ( !empty( $deprecated ) )
1337 _deprecated_argument( __FUNCTION__, '2.7' );
1339 $response = wp_remote_head( $url );
1341 if ( is_wp_error( $response ) )
1344 return wp_remote_retrieve_headers( $response );
1348 * Whether today is a new day.
1352 * @uses $previousday Previous day
1354 * @return int 1 when new day, 0 if not a new day.
1356 function is_new_day() {
1357 global $currentday, $previousday;
1358 if ( $currentday != $previousday )
1365 * Build URL query based on an associative and, or indexed array.
1367 * This is a convenient function for easily building url queries. It sets the
1368 * separator to '&' and uses _http_build_query() function.
1370 * @see _http_build_query() Used to build the query
1371 * @link http://us2.php.net/manual/en/function.http-build-query.php more on what
1372 * http_build_query() does.
1376 * @param array $data URL-encode key/value pairs.
1377 * @return string URL encoded string
1379 function build_query( $data ) {
1380 return _http_build_query( $data, null, '&', '', false );
1383 // from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
1384 function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
1387 foreach ( (array) $data as $k => $v ) {
1390 if ( is_int($k) && $prefix != null )
1393 $k = $key . '%5B' . $k . '%5D';
1396 elseif ( $v === FALSE )
1399 if ( is_array($v) || is_object($v) )
1400 array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
1401 elseif ( $urlencode )
1402 array_push($ret, $k.'='.urlencode($v));
1404 array_push($ret, $k.'='.$v);
1407 if ( NULL === $sep )
1408 $sep = ini_get('arg_separator.output');
1410 return implode($sep, $ret);
1414 * Retrieve a modified URL query string.
1416 * You can rebuild the URL and append a new query variable to the URL query by
1417 * using this function. You can also retrieve the full URL with query data.
1419 * Adding a single key & value or an associative array. Setting a key value to
1420 * emptystring removes the key. Omitting oldquery_or_uri uses the $_SERVER
1425 * @param mixed $param1 Either newkey or an associative_array
1426 * @param mixed $param2 Either newvalue or oldquery or uri
1427 * @param mixed $param3 Optional. Old query or uri
1428 * @return string New URL query string.
1430 function add_query_arg() {
1432 if ( is_array( func_get_arg(0) ) ) {
1433 if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) )
1434 $uri = $_SERVER['REQUEST_URI'];
1436 $uri = @func_get_arg( 1 );
1438 if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) )
1439 $uri = $_SERVER['REQUEST_URI'];
1441 $uri = @func_get_arg( 2 );
1444 if ( $frag = strstr( $uri, '#' ) )
1445 $uri = substr( $uri, 0, -strlen( $frag ) );
1449 if ( preg_match( '|^https?://|i', $uri, $matches ) ) {
1450 $protocol = $matches[0];
1451 $uri = substr( $uri, strlen( $protocol ) );
1456 if ( strpos( $uri, '?' ) !== false ) {
1457 $parts = explode( '?', $uri, 2 );
1458 if ( 1 == count( $parts ) ) {
1462 $base = $parts[0] . '?';
1465 } elseif ( !empty( $protocol ) || strpos( $uri, '=' ) === false ) {
1473 wp_parse_str( $query, $qs );
1474 $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
1475 if ( is_array( func_get_arg( 0 ) ) ) {
1476 $kayvees = func_get_arg( 0 );
1477 $qs = array_merge( $qs, $kayvees );
1479 $qs[func_get_arg( 0 )] = func_get_arg( 1 );
1482 foreach ( (array) $qs as $k => $v ) {
1487 $ret = build_query( $qs );
1488 $ret = trim( $ret, '?' );
1489 $ret = preg_replace( '#=(&|$)#', '$1', $ret );
1490 $ret = $protocol . $base . $ret . $frag;
1491 $ret = rtrim( $ret, '?' );
1496 * Removes an item or list from the query string.
1500 * @param string|array $key Query key or keys to remove.
1501 * @param bool $query When false uses the $_SERVER value.
1502 * @return string New URL query string.
1504 function remove_query_arg( $key, $query=false ) {
1505 if ( is_array( $key ) ) { // removing multiple keys
1506 foreach ( $key as $k )
1507 $query = add_query_arg( $k, false, $query );
1510 return add_query_arg( $key, false, $query );
1514 * Walks the array while sanitizing the contents.
1518 * @param array $array Array to used to walk while sanitizing contents.
1519 * @return array Sanitized $array.
1521 function add_magic_quotes( $array ) {
1522 foreach ( (array) $array as $k => $v ) {
1523 if ( is_array( $v ) ) {
1524 $array[$k] = add_magic_quotes( $v );
1526 $array[$k] = addslashes( $v );
1533 * HTTP request for URI to retrieve content.
1536 * @uses wp_remote_get()
1538 * @param string $uri URI/URL of web page to retrieve.
1539 * @return bool|string HTTP content. False on failure.
1541 function wp_remote_fopen( $uri ) {
1542 $parsed_url = @parse_url( $uri );
1544 if ( !$parsed_url || !is_array( $parsed_url ) )
1548 $options['timeout'] = 10;
1550 $response = wp_remote_get( $uri, $options );
1552 if ( is_wp_error( $response ) )
1555 return wp_remote_retrieve_body( $response );
1559 * Set up the WordPress query.
1563 * @param string $query_vars Default WP_Query arguments.
1565 function wp( $query_vars = '' ) {
1566 global $wp, $wp_query, $wp_the_query;
1567 $wp->main( $query_vars );
1569 if ( !isset($wp_the_query) )
1570 $wp_the_query = $wp_query;
1574 * Retrieve the description for the HTTP status.
1578 * @param int $code HTTP status code.
1579 * @return string Empty string if not found, or description if found.
1581 function get_status_header_desc( $code ) {
1582 global $wp_header_to_desc;
1584 $code = absint( $code );
1586 if ( !isset( $wp_header_to_desc ) ) {
1587 $wp_header_to_desc = array(
1589 101 => 'Switching Protocols',
1590 102 => 'Processing',
1595 203 => 'Non-Authoritative Information',
1596 204 => 'No Content',
1597 205 => 'Reset Content',
1598 206 => 'Partial Content',
1599 207 => 'Multi-Status',
1602 300 => 'Multiple Choices',
1603 301 => 'Moved Permanently',
1606 304 => 'Not Modified',
1609 307 => 'Temporary Redirect',
1611 400 => 'Bad Request',
1612 401 => 'Unauthorized',
1613 402 => 'Payment Required',
1616 405 => 'Method Not Allowed',
1617 406 => 'Not Acceptable',
1618 407 => 'Proxy Authentication Required',
1619 408 => 'Request Timeout',
1622 411 => 'Length Required',
1623 412 => 'Precondition Failed',
1624 413 => 'Request Entity Too Large',
1625 414 => 'Request-URI Too Long',
1626 415 => 'Unsupported Media Type',
1627 416 => 'Requested Range Not Satisfiable',
1628 417 => 'Expectation Failed',
1629 422 => 'Unprocessable Entity',
1631 424 => 'Failed Dependency',
1632 426 => 'Upgrade Required',
1634 500 => 'Internal Server Error',
1635 501 => 'Not Implemented',
1636 502 => 'Bad Gateway',
1637 503 => 'Service Unavailable',
1638 504 => 'Gateway Timeout',
1639 505 => 'HTTP Version Not Supported',
1640 506 => 'Variant Also Negotiates',
1641 507 => 'Insufficient Storage',
1642 510 => 'Not Extended'
1646 if ( isset( $wp_header_to_desc[$code] ) )
1647 return $wp_header_to_desc[$code];
1653 * Set HTTP status header.
1656 * @uses apply_filters() Calls 'status_header' on status header string, HTTP
1657 * HTTP code, HTTP code description, and protocol string as separate
1660 * @param int $header HTTP status code
1663 function status_header( $header ) {
1664 $text = get_status_header_desc( $header );
1666 if ( empty( $text ) )
1669 $protocol = $_SERVER["SERVER_PROTOCOL"];
1670 if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
1671 $protocol = 'HTTP/1.0';
1672 $status_header = "$protocol $header $text";
1673 if ( function_exists( 'apply_filters' ) )
1674 $status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol );
1676 return @header( $status_header, true, $header );
1680 * Gets the header information to prevent caching.
1682 * The several different headers cover the different ways cache prevention is handled
1683 * by different browsers
1687 * @uses apply_filters()
1688 * @return array The associative array of header names and field values.
1690 function wp_get_nocache_headers() {
1692 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
1693 'Last-Modified' => gmdate( 'D, d M Y H:i:s' ) . ' GMT',
1694 'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
1695 'Pragma' => 'no-cache',
1698 if ( function_exists('apply_filters') ) {
1699 $headers = (array) apply_filters('nocache_headers', $headers);
1705 * Sets the headers to prevent caching for the different browsers.
1707 * Different browsers support different nocache headers, so several headers must
1708 * be sent so that all of them get the point that no caching should occur.
1711 * @uses wp_get_nocache_headers()
1713 function nocache_headers() {
1714 $headers = wp_get_nocache_headers();
1715 foreach( $headers as $name => $field_value )
1716 @header("{$name}: {$field_value}");
1720 * Set the headers for caching for 10 days with JavaScript content type.
1724 function cache_javascript_headers() {
1725 $expiresOffset = 864000; // 10 days
1726 header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );
1727 header( "Vary: Accept-Encoding" ); // Handle proxies
1728 header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
1732 * Retrieve the number of database queries during the WordPress execution.
1736 * @return int Number of database queries
1738 function get_num_queries() {
1740 return $wpdb->num_queries;
1744 * Whether input is yes or no. Must be 'y' to be true.
1748 * @param string $yn Character string containing either 'y' or 'n'
1749 * @return bool True if yes, false on anything else
1751 function bool_from_yn( $yn ) {
1752 return ( strtolower( $yn ) == 'y' );
1756 * Loads the feed template from the use of an action hook.
1758 * If the feed action does not have a hook, then the function will die with a
1759 * message telling the visitor that the feed is not valid.
1761 * It is better to only have one hook for each feed.
1764 * @uses $wp_query Used to tell if the use a comment feed.
1765 * @uses do_action() Calls 'do_feed_$feed' hook, if a hook exists for the feed.
1767 function do_feed() {
1770 $feed = get_query_var( 'feed' );
1772 // Remove the pad, if present.
1773 $feed = preg_replace( '/^_+/', '', $feed );
1775 if ( $feed == '' || $feed == 'feed' )
1776 $feed = get_default_feed();
1778 $hook = 'do_feed_' . $feed;
1779 if ( !has_action($hook) ) {
1780 $message = sprintf( __( 'ERROR: %s is not a valid feed template.' ), esc_html($feed));
1781 wp_die( $message, '', array( 'response' => 404 ) );
1784 do_action( $hook, $wp_query->is_comment_feed );
1788 * Load the RDF RSS 0.91 Feed template.
1792 function do_feed_rdf() {
1793 load_template( ABSPATH . WPINC . '/feed-rdf.php' );
1797 * Load the RSS 1.0 Feed Template
1801 function do_feed_rss() {
1802 load_template( ABSPATH . WPINC . '/feed-rss.php' );
1806 * Load either the RSS2 comment feed or the RSS2 posts feed.
1810 * @param bool $for_comments True for the comment feed, false for normal feed.
1812 function do_feed_rss2( $for_comments ) {
1813 if ( $for_comments )
1814 load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );
1816 load_template( ABSPATH . WPINC . '/feed-rss2.php' );
1820 * Load either Atom comment feed or Atom posts feed.
1824 * @param bool $for_comments True for the comment feed, false for normal feed.
1826 function do_feed_atom( $for_comments ) {
1828 load_template( ABSPATH . WPINC . '/feed-atom-comments.php');
1830 load_template( ABSPATH . WPINC . '/feed-atom.php' );
1834 * Display the robot.txt file content.
1836 * The echo content should be with usage of the permalinks or for creating the
1840 * @uses do_action() Calls 'do_robotstxt' hook for displaying robot.txt rules.
1842 function do_robots() {
1843 header( 'Content-Type: text/plain; charset=utf-8' );
1845 do_action( 'do_robotstxt' );
1848 $public = get_option( 'blog_public' );
1849 if ( '0' == $public ) {
1850 $output .= "User-agent: *\n";
1851 $output .= "Disallow: /\n";
1853 $output .= "User-agent: *\n";
1854 $output .= "Disallow:\n";
1857 echo apply_filters('robots_txt', $output, $public);
1861 * Test whether blog is already installed.
1863 * The cache will be checked first. If you have a cache plugin, which saves the
1864 * cache values, then this will work. If you use the default WordPress cache,
1865 * and the database goes away, then you might have problems.
1867 * Checks for the option siteurl for whether WordPress is installed.
1872 * @return bool Whether blog is already installed.
1874 function is_blog_installed() {
1877 // Check cache first. If options table goes away and we have true cached, oh well.
1878 if ( wp_cache_get( 'is_blog_installed' ) )
1881 $suppress = $wpdb->suppress_errors();
1882 if ( ! defined( 'WP_INSTALLING' ) ) {
1883 $alloptions = wp_load_alloptions();
1885 // If siteurl is not set to autoload, check it specifically
1886 if ( !isset( $alloptions['siteurl'] ) )
1887 $installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );
1889 $installed = $alloptions['siteurl'];
1890 $wpdb->suppress_errors( $suppress );
1892 $installed = !empty( $installed );
1893 wp_cache_set( 'is_blog_installed', $installed );
1898 $suppress = $wpdb->suppress_errors();
1899 $tables = $wpdb->get_col('SHOW TABLES');
1900 $wpdb->suppress_errors( $suppress );
1902 $wp_tables = $wpdb->tables();
1903 // Loop over the WP tables. If none exist, then scratch install is allowed.
1904 // If one or more exist, suggest table repair since we got here because the options
1905 // table could not be accessed.
1906 foreach ( $wp_tables as $table ) {
1907 // If one of the WP tables exist, then we are in an insane state.
1908 if ( in_array( $table, $tables ) ) {
1909 // The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
1910 if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
1912 if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
1915 // If visiting repair.php, return true and let it take over.
1916 if ( defined('WP_REPAIRING') )
1918 // Die with a DB error.
1919 $wpdb->error = sprintf( /*WP_I18N_NO_TABLES*/'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.'/*/WP_I18N_NO_TABLES*/, 'maint/repair.php?referrer=is_blog_installed' );
1924 wp_cache_set( 'is_blog_installed', false );
1930 * Retrieve URL with nonce added to URL query.
1932 * @package WordPress
1933 * @subpackage Security
1936 * @param string $actionurl URL to add nonce action
1937 * @param string $action Optional. Nonce action name
1938 * @return string URL with nonce action added.
1940 function wp_nonce_url( $actionurl, $action = -1 ) {
1941 $actionurl = str_replace( '&', '&', $actionurl );
1942 return esc_html( add_query_arg( '_wpnonce', wp_create_nonce( $action ), $actionurl ) );
1946 * Retrieve or display nonce hidden field for forms.
1948 * The nonce field is used to validate that the contents of the form came from
1949 * the location on the current site and not somewhere else. The nonce does not
1950 * offer absolute protection, but should protect against most cases. It is very
1951 * important to use nonce field in forms.
1953 * The $action and $name are optional, but if you want to have better security,
1954 * it is strongly suggested to set those two parameters. It is easier to just
1955 * call the function without any parameters, because validation of the nonce
1956 * doesn't require any parameters, but since crackers know what the default is
1957 * it won't be difficult for them to find a way around your nonce and cause
1960 * The input name will be whatever $name value you gave. The input value will be
1961 * the nonce creation value.
1963 * @package WordPress
1964 * @subpackage Security
1967 * @param string $action Optional. Action name.
1968 * @param string $name Optional. Nonce name.
1969 * @param bool $referer Optional, default true. Whether to set the referer field for validation.
1970 * @param bool $echo Optional, default true. Whether to display or return hidden form field.
1971 * @return string Nonce field.
1973 function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
1974 $name = esc_attr( $name );
1975 $nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
1978 $nonce_field .= wp_referer_field( false );
1983 return $nonce_field;
1987 * Retrieve or display referer hidden field for forms.
1989 * The referer link is the current Request URI from the server super global. The
1990 * input name is '_wp_http_referer', in case you wanted to check manually.
1992 * @package WordPress
1993 * @subpackage Security
1996 * @param bool $echo Whether to echo or return the referer field.
1997 * @return string Referer field.
1999 function wp_referer_field( $echo = true ) {
2000 $ref = esc_attr( $_SERVER['REQUEST_URI'] );
2001 $referer_field = '<input type="hidden" name="_wp_http_referer" value="'. $ref . '" />';
2004 echo $referer_field;
2005 return $referer_field;
2009 * Retrieve or display original referer hidden field for forms.
2011 * The input name is '_wp_original_http_referer' and will be either the same
2012 * value of {@link wp_referer_field()}, if that was posted already or it will
2013 * be the current page, if it doesn't exist.
2015 * @package WordPress
2016 * @subpackage Security
2019 * @param bool $echo Whether to echo the original http referer
2020 * @param string $jump_back_to Optional, default is 'current'. Can be 'previous' or page you want to jump back to.
2021 * @return string Original referer field.
2023 function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {
2024 $jump_back_to = ( 'previous' == $jump_back_to ) ? wp_get_referer() : $_SERVER['REQUEST_URI'];
2025 $ref = ( wp_get_original_referer() ) ? wp_get_original_referer() : $jump_back_to;
2026 $orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( stripslashes( $ref ) ) . '" />';
2028 echo $orig_referer_field;
2029 return $orig_referer_field;
2033 * Retrieve referer from '_wp_http_referer', HTTP referer, or current page respectively.
2035 * @package WordPress
2036 * @subpackage Security
2039 * @return string|bool False on failure. Referer URL on success.
2041 function wp_get_referer() {
2043 if ( ! empty( $_REQUEST['_wp_http_referer'] ) )
2044 $ref = $_REQUEST['_wp_http_referer'];
2045 else if ( ! empty( $_SERVER['HTTP_REFERER'] ) )
2046 $ref = $_SERVER['HTTP_REFERER'];
2048 if ( $ref !== $_SERVER['REQUEST_URI'] )
2054 * Retrieve original referer that was posted, if it exists.
2056 * @package WordPress
2057 * @subpackage Security
2060 * @return string|bool False if no original referer or original referer if set.
2062 function wp_get_original_referer() {
2063 if ( !empty( $_REQUEST['_wp_original_http_referer'] ) )
2064 return $_REQUEST['_wp_original_http_referer'];
2069 * Recursive directory creation based on full path.
2071 * Will attempt to set permissions on folders.
2075 * @param string $target Full path to attempt to create.
2076 * @return bool Whether the path was created. True if path already exists.
2078 function wp_mkdir_p( $target ) {
2079 // from php.net/mkdir user contributed notes
2080 $target = str_replace( '//', '/', $target );
2082 // safe mode fails with a trailing slash under certain PHP versions.
2083 $target = rtrim($target, '/'); // Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
2084 if ( empty($target) )
2087 if ( file_exists( $target ) )
2088 return @is_dir( $target );
2090 // Attempting to create the directory may clutter up our display.
2091 if ( @mkdir( $target ) ) {
2092 $stat = @stat( dirname( $target ) );
2093 $dir_perms = $stat['mode'] & 0007777; // Get the permission bits.
2094 @chmod( $target, $dir_perms );
2096 } elseif ( is_dir( dirname( $target ) ) ) {
2100 // If the above failed, attempt to create the parent node, then try again.
2101 if ( ( $target != '/' ) && ( wp_mkdir_p( dirname( $target ) ) ) )
2102 return wp_mkdir_p( $target );
2108 * Test if a give filesystem path is absolute ('/foo/bar', 'c:\windows').
2112 * @param string $path File path
2113 * @return bool True if path is absolute, false is not absolute.
2115 function path_is_absolute( $path ) {
2116 // this is definitive if true but fails if $path does not exist or contains a symbolic link
2117 if ( realpath($path) == $path )
2120 if ( strlen($path) == 0 || $path[0] == '.' )
2123 // windows allows absolute paths like this
2124 if ( preg_match('#^[a-zA-Z]:\\\\#', $path) )
2127 // a path starting with / or \ is absolute; anything else is relative
2128 return (bool) preg_match('#^[/\\\\]#', $path);
2132 * Join two filesystem paths together (e.g. 'give me $path relative to $base').
2134 * If the $path is absolute, then it the full path is returned.
2138 * @param string $base
2139 * @param string $path
2140 * @return string The path with the base or absolute path.
2142 function path_join( $base, $path ) {
2143 if ( path_is_absolute($path) )
2146 return rtrim($base, '/') . '/' . ltrim($path, '/');
2150 * Determines a writable directory for temporary files.
2151 * Function's preference is to WP_CONTENT_DIR followed by the return value of <code>sys_get_temp_dir()</code>, before finally defaulting to /tmp/
2153 * In the event that this function does not find a writable location, It may be overridden by the <code>WP_TEMP_DIR</code> constant in your <code>wp-config.php</code> file.
2157 * @return string Writable temporary directory
2159 function get_temp_dir() {
2161 if ( defined('WP_TEMP_DIR') )
2162 return trailingslashit(WP_TEMP_DIR);
2165 return trailingslashit($temp);
2167 $temp = WP_CONTENT_DIR . '/';
2168 if ( is_dir($temp) && @is_writable($temp) )
2171 if ( function_exists('sys_get_temp_dir') ) {
2172 $temp = sys_get_temp_dir();
2173 if ( @is_writable($temp) )
2174 return trailingslashit($temp);
2177 $temp = ini_get('upload_tmp_dir');
2178 if ( is_dir($temp) && @is_writable($temp) )
2179 return trailingslashit($temp);
2186 * Get an array containing the current upload directory's path and url.
2188 * Checks the 'upload_path' option, which should be from the web root folder,
2189 * and if it isn't empty it will be used. If it is empty, then the path will be
2190 * 'WP_CONTENT_DIR/uploads'. If the 'UPLOADS' constant is defined, then it will
2191 * override the 'upload_path' option and 'WP_CONTENT_DIR/uploads' path.
2193 * The upload URL path is set either by the 'upload_url_path' option or by using
2194 * the 'WP_CONTENT_URL' constant and appending '/uploads' to the path.
2196 * If the 'uploads_use_yearmonth_folders' is set to true (checkbox if checked in
2197 * the administration settings panel), then the time will be used. The format
2198 * will be year first and then month.
2200 * If the path couldn't be created, then an error will be returned with the key
2201 * 'error' containing the error message. The error suggests that the parent
2202 * directory is not writable by the server.
2204 * On success, the returned array will have many indices:
2205 * 'path' - base directory and sub directory or full path to upload directory.
2206 * 'url' - base url and sub directory or absolute URL to upload directory.
2207 * 'subdir' - sub directory if uploads use year/month folders option is on.
2208 * 'basedir' - path without subdir.
2209 * 'baseurl' - URL path without subdir.
2210 * 'error' - set to false.
2213 * @uses apply_filters() Calls 'upload_dir' on returned array.
2215 * @param string $time Optional. Time formatted in 'yyyy/mm'.
2216 * @return array See above for description.
2218 function wp_upload_dir( $time = null ) {
2220 $siteurl = get_option( 'siteurl' );
2221 $upload_path = get_option( 'upload_path' );
2222 $upload_path = trim($upload_path);
2223 $main_override = is_multisite() && defined( 'MULTISITE' ) && is_main_site();
2224 if ( empty($upload_path) ) {
2225 $dir = WP_CONTENT_DIR . '/uploads';
2227 $dir = $upload_path;
2228 if ( 'wp-content/uploads' == $upload_path ) {
2229 $dir = WP_CONTENT_DIR . '/uploads';
2230 } elseif ( 0 !== strpos($dir, ABSPATH) ) {
2231 // $dir is absolute, $upload_path is (maybe) relative to ABSPATH
2232 $dir = path_join( ABSPATH, $dir );
2236 if ( !$url = get_option( 'upload_url_path' ) ) {
2237 if ( empty($upload_path) || ( 'wp-content/uploads' == $upload_path ) || ( $upload_path == $dir ) )
2238 $url = WP_CONTENT_URL . '/uploads';
2240 $url = trailingslashit( $siteurl ) . $upload_path;
2243 if ( defined('UPLOADS') && !$main_override && ( !isset( $switched ) || $switched === false ) ) {
2244 $dir = ABSPATH . UPLOADS;
2245 $url = trailingslashit( $siteurl ) . UPLOADS;
2248 if ( is_multisite() && !$main_override && ( !isset( $switched ) || $switched === false ) ) {
2249 if ( defined( 'BLOGUPLOADDIR' ) )
2250 $dir = untrailingslashit(BLOGUPLOADDIR);
2251 $url = str_replace( UPLOADS, 'files', $url );
2258 if ( get_option( 'uploads_use_yearmonth_folders' ) ) {
2259 // Generate the yearly and monthly dirs
2261 $time = current_time( 'mysql' );
2262 $y = substr( $time, 0, 4 );
2263 $m = substr( $time, 5, 2 );
2270 $uploads = apply_filters( 'upload_dir', array( 'path' => $dir, 'url' => $url, 'subdir' => $subdir, 'basedir' => $bdir, 'baseurl' => $burl, 'error' => false ) );
2272 // Make sure we have an uploads dir
2273 if ( ! wp_mkdir_p( $uploads['path'] ) ) {
2274 $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $uploads['path'] );
2275 return array( 'error' => $message );
2282 * Get a filename that is sanitized and unique for the given directory.
2284 * If the filename is not unique, then a number will be added to the filename
2285 * before the extension, and will continue adding numbers until the filename is
2288 * The callback is passed three parameters, the first one is the directory, the
2289 * second is the filename, and the third is the extension.
2293 * @param string $dir
2294 * @param string $filename
2295 * @param mixed $unique_filename_callback Callback.
2296 * @return string New filename, if given wasn't unique.
2298 function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
2299 // sanitize the file name before we begin processing
2300 $filename = sanitize_file_name($filename);
2302 // separate the filename into a name and extension
2303 $info = pathinfo($filename);
2304 $ext = !empty($info['extension']) ? '.' . $info['extension'] : '';
2305 $name = basename($filename, $ext);
2307 // edge case: if file is named '.ext', treat as an empty name
2308 if ( $name === $ext )
2311 // Increment the file number until we have a unique file to save in $dir. Use callback if supplied.
2312 if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
2313 $filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
2317 // change '.ext' to lower case
2318 if ( $ext && strtolower($ext) != $ext ) {
2319 $ext2 = strtolower($ext);
2320 $filename2 = preg_replace( '|' . preg_quote($ext) . '$|', $ext2, $filename );
2322 // check for both lower and upper case extension or image sub-sizes may be overwritten
2323 while ( file_exists($dir . "/$filename") || file_exists($dir . "/$filename2") ) {
2324 $new_number = $number + 1;
2325 $filename = str_replace( "$number$ext", "$new_number$ext", $filename );
2326 $filename2 = str_replace( "$number$ext2", "$new_number$ext2", $filename2 );
2327 $number = $new_number;
2332 while ( file_exists( $dir . "/$filename" ) ) {
2333 if ( '' == "$number$ext" )
2334 $filename = $filename . ++$number . $ext;
2336 $filename = str_replace( "$number$ext", ++$number . $ext, $filename );
2344 * Create a file in the upload folder with given content.
2346 * If there is an error, then the key 'error' will exist with the error message.
2347 * If success, then the key 'file' will have the unique file path, the 'url' key
2348 * will have the link to the new file. and the 'error' key will be set to false.
2350 * This function will not move an uploaded file to the upload folder. It will
2351 * create a new file with the content in $bits parameter. If you move the upload
2352 * file, read the content of the uploaded file, and then you can give the
2353 * filename and content to this function, which will add it to the upload
2356 * The permissions will be set on the new file automatically by this function.
2360 * @param string $name
2361 * @param null $deprecated Never used. Set to null.
2362 * @param mixed $bits File content
2363 * @param string $time Optional. Time formatted in 'yyyy/mm'.
2366 function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
2367 if ( !empty( $deprecated ) )
2368 _deprecated_argument( __FUNCTION__, '2.0' );
2370 if ( empty( $name ) )
2371 return array( 'error' => __( 'Empty filename' ) );
2373 $wp_filetype = wp_check_filetype( $name );
2374 if ( !$wp_filetype['ext'] )
2375 return array( 'error' => __( 'Invalid file type' ) );
2377 $upload = wp_upload_dir( $time );
2379 if ( $upload['error'] !== false )
2382 $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) );
2383 if ( !is_array( $upload_bits_error ) ) {
2384 $upload[ 'error' ] = $upload_bits_error;
2388 $filename = wp_unique_filename( $upload['path'], $name );
2390 $new_file = $upload['path'] . "/$filename";
2391 if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
2392 $message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), dirname( $new_file ) );
2393 return array( 'error' => $message );
2396 $ifp = @ fopen( $new_file, 'wb' );
2398 return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) );
2400 @fwrite( $ifp, $bits );
2404 // Set correct file permissions
2405 $stat = @ stat( dirname( $new_file ) );
2406 $perms = $stat['mode'] & 0007777;
2407 $perms = $perms & 0000666;
2408 @ chmod( $new_file, $perms );
2412 $url = $upload['url'] . "/$filename";
2414 return array( 'file' => $new_file, 'url' => $url, 'error' => false );
2418 * Retrieve the file type based on the extension name.
2420 * @package WordPress
2422 * @uses apply_filters() Calls 'ext2type' hook on default supported types.
2424 * @param string $ext The extension to search.
2425 * @return string|null The file type, example: audio, video, document, spreadsheet, etc. Null if not found.
2427 function wp_ext2type( $ext ) {
2428 $ext2type = apply_filters( 'ext2type', array(
2429 'audio' => array( 'aac', 'ac3', 'aif', 'aiff', 'm3a', 'm4a', 'm4b', 'mka', 'mp1', 'mp2', 'mp3', 'ogg', 'oga', 'ram', 'wav', 'wma' ),
2430 'video' => array( 'asf', 'avi', 'divx', 'dv', 'flv', 'm4v', 'mkv', 'mov', 'mp4', 'mpeg', 'mpg', 'mpv', 'ogm', 'ogv', 'qt', 'rm', 'vob', 'wmv' ),
2431 'document' => array( 'doc', 'docx', 'docm', 'dotm', 'odt', 'pages', 'pdf', 'rtf', 'wp', 'wpd' ),
2432 'spreadsheet' => array( 'numbers', 'ods', 'xls', 'xlsx', 'xlsb', 'xlsm' ),
2433 'interactive' => array( 'key', 'ppt', 'pptx', 'pptm', 'odp', 'swf' ),
2434 'text' => array( 'asc', 'csv', 'tsv', 'txt' ),
2435 'archive' => array( 'bz2', 'cab', 'dmg', 'gz', 'rar', 'sea', 'sit', 'sqx', 'tar', 'tgz', 'zip' ),
2436 'code' => array( 'css', 'htm', 'html', 'php', 'js' ),
2438 foreach ( $ext2type as $type => $exts )
2439 if ( in_array( $ext, $exts ) )
2444 * Retrieve the file type from the file name.
2446 * You can optionally define the mime array, if needed.
2450 * @param string $filename File name or path.
2451 * @param array $mimes Optional. Key is the file extension with value as the mime type.
2452 * @return array Values with extension first and mime type.
2454 function wp_check_filetype( $filename, $mimes = null ) {
2455 if ( empty($mimes) )
2456 $mimes = get_allowed_mime_types();
2460 foreach ( $mimes as $ext_preg => $mime_match ) {
2461 $ext_preg = '!\.(' . $ext_preg . ')$!i';
2462 if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
2463 $type = $mime_match;
2464 $ext = $ext_matches[1];
2469 return compact( 'ext', 'type' );
2473 * Attempt to determine the real file type of a file.
2474 * If unable to, the file name extension will be used to determine type.
2476 * If it's determined that the extension does not match the file's real type,
2477 * then the "proper_filename" value will be set with a proper filename and extension.
2479 * Currently this function only supports validating images known to getimagesize().
2483 * @param string $file Full path to the image.
2484 * @param string $filename The filename of the image (may differ from $file due to $file being in a tmp directory)
2485 * @param array $mimes Optional. Key is the file extension with value as the mime type.
2486 * @return array Values for the extension, MIME, and either a corrected filename or false if original $filename is valid
2488 function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
2490 $proper_filename = false;
2492 // Do basic extension validation and MIME mapping
2493 $wp_filetype = wp_check_filetype( $filename, $mimes );
2494 extract( $wp_filetype );
2496 // We can't do any further validation without a file to work with
2497 if ( ! file_exists( $file ) )
2498 return compact( 'ext', 'type', 'proper_filename' );
2500 // We're able to validate images using GD
2501 if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
2503 // Attempt to figure out what type of image it actually is
2504 $imgstats = @getimagesize( $file );
2506 // If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
2507 if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
2508 // This is a simplified array of MIMEs that getimagesize() can detect and their extensions
2509 // You shouldn't need to use this filter, but it's here just in case
2510 $mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(
2511 'image/jpeg' => 'jpg',
2512 'image/png' => 'png',
2513 'image/gif' => 'gif',
2514 'image/bmp' => 'bmp',
2515 'image/tiff' => 'tif',
2518 // Replace whatever is after the last period in the filename with the correct extension
2519 if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
2520 $filename_parts = explode( '.', $filename );
2521 array_pop( $filename_parts );
2522 $filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
2523 $new_filename = implode( '.', $filename_parts );
2525 if ( $new_filename != $filename )
2526 $proper_filename = $new_filename; // Mark that it changed
2528 // Redefine the extension / MIME
2529 $wp_filetype = wp_check_filetype( $new_filename, $mimes );
2530 extract( $wp_filetype );
2535 // Let plugins try and validate other types of files
2536 // Should return an array in the style of array( 'ext' => $ext, 'type' => $type, 'proper_filename' => $proper_filename )
2537 return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
2541 * Retrieve list of allowed mime types and file extensions.
2545 * @return array Array of mime types keyed by the file extension regex corresponding to those types.
2547 function get_allowed_mime_types() {
2548 static $mimes = false;
2551 // Accepted MIME types are set here as PCRE unless provided.
2552 $mimes = apply_filters( 'upload_mimes', array(
2553 'jpg|jpeg|jpe' => 'image/jpeg',
2554 'gif' => 'image/gif',
2555 'png' => 'image/png',
2556 'bmp' => 'image/bmp',
2557 'tif|tiff' => 'image/tiff',
2558 'ico' => 'image/x-icon',
2559 'asf|asx|wax|wmv|wmx' => 'video/asf',
2560 'avi' => 'video/avi',
2561 'divx' => 'video/divx',
2562 'flv' => 'video/x-flv',
2563 'mov|qt' => 'video/quicktime',
2564 'mpeg|mpg|mpe' => 'video/mpeg',
2565 'txt|asc|c|cc|h' => 'text/plain',
2566 'csv' => 'text/csv',
2567 'tsv' => 'text/tab-separated-values',
2568 'ics' => 'text/calendar',
2569 'rtx' => 'text/richtext',
2570 'css' => 'text/css',
2571 'htm|html' => 'text/html',
2572 'mp3|m4a|m4b' => 'audio/mpeg',
2573 'mp4|m4v' => 'video/mp4',
2574 'ra|ram' => 'audio/x-realaudio',
2575 'wav' => 'audio/wav',
2576 'ogg|oga' => 'audio/ogg',
2577 'ogv' => 'video/ogg',
2578 'mid|midi' => 'audio/midi',
2579 'wma' => 'audio/wma',
2580 'mka' => 'audio/x-matroska',
2581 'mkv' => 'video/x-matroska',
2582 'rtf' => 'application/rtf',
2583 'js' => 'application/javascript',
2584 'pdf' => 'application/pdf',
2585 'doc|docx' => 'application/msword',
2586 'pot|pps|ppt|pptx|ppam|pptm|sldm|ppsm|potm' => 'application/vnd.ms-powerpoint',
2587 'wri' => 'application/vnd.ms-write',
2588 'xla|xls|xlsx|xlt|xlw|xlam|xlsb|xlsm|xltm' => 'application/vnd.ms-excel',
2589 'mdb' => 'application/vnd.ms-access',
2590 'mpp' => 'application/vnd.ms-project',
2591 'docm|dotm' => 'application/vnd.ms-word',
2592 'pptx|sldx|ppsx|potx' => 'application/vnd.openxmlformats-officedocument.presentationml',
2593 'xlsx|xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml',
2594 'docx|dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml',
2595 'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
2596 'swf' => 'application/x-shockwave-flash',
2597 'class' => 'application/java',
2598 'tar' => 'application/x-tar',
2599 'zip' => 'application/zip',
2600 'gz|gzip' => 'application/x-gzip',
2601 'exe' => 'application/x-msdownload',
2602 // openoffice formats
2603 'odt' => 'application/vnd.oasis.opendocument.text',
2604 'odp' => 'application/vnd.oasis.opendocument.presentation',
2605 'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
2606 'odg' => 'application/vnd.oasis.opendocument.graphics',
2607 'odc' => 'application/vnd.oasis.opendocument.chart',
2608 'odb' => 'application/vnd.oasis.opendocument.database',
2609 'odf' => 'application/vnd.oasis.opendocument.formula',
2610 // wordperfect formats
2611 'wp|wpd' => 'application/wordperfect',
2619 * Retrieve nonce action "Are you sure" message.
2621 * The action is split by verb and noun. The action format is as follows:
2622 * verb-action_extra. The verb is before the first dash and has the format of
2623 * letters and no spaces and numbers. The noun is after the dash and before the
2624 * underscore, if an underscore exists. The noun is also only letters.
2626 * The filter will be called for any action, which is not defined by WordPress.
2627 * You may use the filter for your plugin to explain nonce actions to the user,
2628 * when they get the "Are you sure?" message. The filter is in the format of
2629 * 'explain_nonce_$verb-$noun' with the $verb replaced by the found verb and the
2630 * $noun replaced by the found noun. The two parameters that are given to the
2631 * hook are the localized "Are you sure you want to do this?" message with the
2632 * extra text (the text after the underscore).
2634 * @package WordPress
2635 * @subpackage Security
2638 * @param string $action Nonce action.
2639 * @return string Are you sure message.
2641 function wp_explain_nonce( $action ) {
2642 if ( $action !== -1 && preg_match( '/([a-z]+)-([a-z]+)(_(.+))?/', $action, $matches ) ) {
2643 $verb = $matches[1];
2644 $noun = $matches[2];
2647 $trans['update']['attachment'] = array( __( 'Your attempt to edit this attachment: “%s” has failed.' ), 'get_the_title' );
2649 $trans['add']['category'] = array( __( 'Your attempt to add this category has failed.' ), false );
2650 $trans['delete']['category'] = array( __( 'Your attempt to delete this category: “%s” has failed.' ), 'get_cat_name' );
2651 $trans['update']['category'] = array( __( 'Your attempt to edit this category: “%s” has failed.' ), 'get_cat_name' );
2653 $trans['delete']['comment'] = array( __( 'Your attempt to delete this comment: “%s” has failed.' ), 'use_id' );
2654 $trans['unapprove']['comment'] = array( __( 'Your attempt to unapprove this comment: “%s” has failed.' ), 'use_id' );
2655 $trans['approve']['comment'] = array( __( 'Your attempt to approve this comment: “%s” has failed.' ), 'use_id' );
2656 $trans['update']['comment'] = array( __( 'Your attempt to edit this comment: “%s” has failed.' ), 'use_id' );
2657 $trans['bulk']['comments'] = array( __( 'Your attempt to bulk modify comments has failed.' ), false );
2658 $trans['moderate']['comments'] = array( __( 'Your attempt to moderate comments has failed.' ), false );
2660 $trans['add']['bookmark'] = array( __( 'Your attempt to add this link has failed.' ), false );
2661 $trans['delete']['bookmark'] = array( __( 'Your attempt to delete this link: “%s” has failed.' ), 'use_id' );
2662 $trans['update']['bookmark'] = array( __( 'Your attempt to edit this link: “%s” has failed.' ), 'use_id' );
2663 $trans['bulk']['bookmarks'] = array( __( 'Your attempt to bulk modify links has failed.' ), false );
2665 $trans['add']['page'] = array( __( 'Your attempt to add this page has failed.' ), false );
2666 $trans['delete']['page'] = array( __( 'Your attempt to delete this page: “%s” has failed.' ), 'get_the_title' );
2667 $trans['update']['page'] = array( __( 'Your attempt to edit this page: “%s” has failed.' ), 'get_the_title' );
2669 $trans['edit']['plugin'] = array( __( 'Your attempt to edit this plugin file: “%s” has failed.' ), 'use_id' );
2670 $trans['activate']['plugin'] = array( __( 'Your attempt to activate this plugin: “%s” has failed.' ), 'use_id' );
2671 $trans['deactivate']['plugin'] = array( __( 'Your attempt to deactivate this plugin: “%s” has failed.' ), 'use_id' );
2672 $trans['upgrade']['plugin'] = array( __( 'Your attempt to update this plugin: “%s” has failed.' ), 'use_id' );
2674 $trans['add']['post'] = array( __( 'Your attempt to add this post has failed.' ), false );
2675 $trans['delete']['post'] = array( __( 'Your attempt to delete this post: “%s” has failed.' ), 'get_the_title' );
2676 $trans['update']['post'] = array( __( 'Your attempt to edit this post: “%s” has failed.' ), 'get_the_title' );
2678 $trans['add']['user'] = array( __( 'Your attempt to add this user has failed.' ), false );
2679 $trans['delete']['users'] = array( __( 'Your attempt to delete users has failed.' ), false );
2680 $trans['bulk']['users'] = array( __( 'Your attempt to bulk modify users has failed.' ), false );
2681 $trans['update']['user'] = array( __( 'Your attempt to edit this user: “%s” has failed.' ), 'get_the_author_meta', 'display_name' );
2682 $trans['update']['profile'] = array( __( 'Your attempt to modify the profile for: “%s” has failed.' ), 'get_the_author_meta', 'display_name' );
2684 $trans['update']['options'] = array( __( 'Your attempt to edit your settings has failed.' ), false );
2685 $trans['update']['permalink'] = array( __( 'Your attempt to change your permalink structure to: %s has failed.' ), 'use_id' );
2686 $trans['edit']['file'] = array( __( 'Your attempt to edit this file: “%s” has failed.' ), 'use_id' );
2687 $trans['edit']['theme'] = array( __( 'Your attempt to edit this theme file: “%s” has failed.' ), 'use_id' );
2688 $trans['switch']['theme'] = array( __( 'Your attempt to switch to this theme: “%s” has failed.' ), 'use_id' );
2690 $trans['log']['out'] = array( sprintf( __( 'You are attempting to log out of %s' ), get_bloginfo( 'sitename' ) ), false );
2692 if ( isset( $trans[$verb][$noun] ) ) {
2693 if ( !empty( $trans[$verb][$noun][1] ) ) {
2694 $lookup = $trans[$verb][$noun][1];
2695 if ( isset($trans[$verb][$noun][2]) )
2696 $lookup_value = $trans[$verb][$noun][2];
2697 $object = $matches[4];
2698 if ( 'use_id' != $lookup ) {
2699 if ( isset( $lookup_value ) )
2700 $object = call_user_func( $lookup, $lookup_value, $object );
2702 $object = call_user_func( $lookup, $object );
2704 return sprintf( $trans[$verb][$noun][0], esc_html($object) );
2706 return $trans[$verb][$noun][0];
2710 return apply_filters( 'explain_nonce_' . $verb . '-' . $noun, __( 'Are you sure you want to do this?' ), isset($matches[4]) ? $matches[4] : '' );
2712 return apply_filters( 'explain_nonce_' . $action, __( 'Are you sure you want to do this?' ) );
2717 * Display "Are You Sure" message to confirm the action being taken.
2719 * If the action has the nonce explain message, then it will be displayed along
2720 * with the "Are you sure?" message.
2722 * @package WordPress
2723 * @subpackage Security
2726 * @param string $action The nonce action.
2728 function wp_nonce_ays( $action ) {
2729 $title = __( 'WordPress Failure Notice' );
2730 $html = esc_html( wp_explain_nonce( $action ) );
2731 if ( 'log-out' == $action )
2732 $html .= "</p><p>" . sprintf( __( "Do you really want to <a href='%s'>log out</a>?"), wp_logout_url() );
2733 elseif ( wp_get_referer() )
2734 $html .= "</p><p><a href='" . esc_url( remove_query_arg( 'updated', wp_get_referer() ) ) . "'>" . __( 'Please try again.' ) . "</a>";
2736 wp_die( $html, $title, array('response' => 403) );
2741 * Kill WordPress execution and display HTML message with error message.
2743 * This function complements the die() PHP function. The difference is that
2744 * HTML will be displayed to the user. It is recommended to use this function
2745 * only, when the execution should not continue any further. It is not
2746 * recommended to call this function very often and try to handle as many errors
2747 * as possible siliently.
2751 * @param string $message Error message.
2752 * @param string $title Error title.
2753 * @param string|array $args Optional arguements to control behaviour.
2755 function wp_die( $message, $title = '', $args = array() ) {
2756 if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
2759 if ( function_exists( 'apply_filters' ) ) {
2760 $function = apply_filters( 'wp_die_handler', '_default_wp_die_handler');
2762 $function = '_default_wp_die_handler';
2765 call_user_func( $function, $message, $title, $args );
2769 * Kill WordPress execution and display HTML message with error message.
2771 * This is the default handler for wp_die if you want a custom one for your
2772 * site then you can overload using the wp_die_handler filter in wp_die
2777 * @param string $message Error message.
2778 * @param string $title Error title.
2779 * @param string|array $args Optional arguements to control behaviour.
2781 function _default_wp_die_handler( $message, $title = '', $args = array() ) {
2782 $defaults = array( 'response' => 500 );
2783 $r = wp_parse_args($args, $defaults);
2785 $have_gettext = function_exists('__');
2787 if ( function_exists( 'is_wp_error' ) && is_wp_error( $message ) ) {
2788 if ( empty( $title ) ) {
2789 $error_data = $message->get_error_data();
2790 if ( is_array( $error_data ) && isset( $error_data['title'] ) )
2791 $title = $error_data['title'];
2793 $errors = $message->get_error_messages();
2794 switch ( count( $errors ) ) :
2799 $message = "<p>{$errors[0]}</p>";
2802 $message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $errors ) . "</li>\n\t</ul>";
2805 } elseif ( is_string( $message ) ) {
2806 $message = "<p>$message</p>";
2809 if ( isset( $r['back_link'] ) && $r['back_link'] ) {
2810 $back_text = $have_gettext? __('« Back') : '« Back';
2811 $message .= "\n<p><a href='javascript:history.back()'>$back_text</p>";
2814 if ( defined( 'WP_SITEURL' ) && '' != WP_SITEURL )
2815 $admin_dir = WP_SITEURL . '/wp-admin/';
2816 elseif ( function_exists( 'get_bloginfo' ) && '' != get_bloginfo( 'wpurl' ) )
2817 $admin_dir = get_bloginfo( 'wpurl' ) . '/wp-admin/';
2818 elseif ( strpos( $_SERVER['PHP_SELF'], 'wp-admin' ) !== false )
2821 $admin_dir = 'wp-admin/';
2823 if ( !function_exists( 'did_action' ) || !did_action( 'admin_head' ) ) :
2824 if ( !headers_sent() ) {
2825 status_header( $r['response'] );
2827 header( 'Content-Type: text/html; charset=utf-8' );
2830 if ( empty($title) )
2831 $title = $have_gettext ? __('WordPress › Error') : 'WordPress › Error';
2833 $text_direction = 'ltr';
2834 if ( isset($r['text_direction']) && 'rtl' == $r['text_direction'] )
2835 $text_direction = 'rtl';
2836 elseif ( function_exists( 'is_rtl' ) && is_rtl() )
2837 $text_direction = 'rtl';
2839 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2840 <!-- Ticket #11289, IE bug fix: always pad the error page with enough characters such that it is greater than 512 bytes, even after gzip compression abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono -->
2841 <html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) language_attributes(); else echo "dir='$text_direction'"; ?>>
2843 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
2844 <title><?php echo $title ?></title>
2845 <link rel="stylesheet" href="<?php echo $admin_dir; ?>css/install.css" type="text/css" />
2847 if ( 'rtl' == $text_direction ) : ?>
2848 <link rel="stylesheet" href="<?php echo $admin_dir; ?>css/install-rtl.css" type="text/css" />
2851 <body id="error-page">
2853 <?php echo $message; ?>
2861 * Kill WordPress execution and display XML message with error message.
2863 * This is the handler for wp_die when processing XMLRPC requests.
2868 * @param string $message Error message.
2869 * @param string $title Error title.
2870 * @param string|array $args Optional arguements to control behaviour.
2872 function _xmlrpc_wp_die_handler( $message, $title = '', $args = array() ) {
2873 global $wp_xmlrpc_server;
2874 $defaults = array( 'response' => 500 );
2876 $r = wp_parse_args($args, $defaults);
2878 if ( $wp_xmlrpc_server ) {
2879 $error = new IXR_Error( $r['response'] , $message);
2880 $wp_xmlrpc_server->output( $error->getXml() );
2886 * Filter to enable special wp_die handler for xmlrpc requests.
2891 function _xmlrpc_wp_die_filter() {
2892 return '_xmlrpc_wp_die_handler';
2897 * Retrieve the WordPress home page URL.
2899 * If the constant named 'WP_HOME' exists, then it willl be used and returned by
2900 * the function. This can be used to counter the redirection on your local
2901 * development environment.
2904 * @package WordPress
2907 * @param string $url URL for the home location
2908 * @return string Homepage location.
2910 function _config_wp_home( $url = '' ) {
2911 if ( defined( 'WP_HOME' ) )
2917 * Retrieve the WordPress site URL.
2919 * If the constant named 'WP_SITEURL' is defined, then the value in that
2920 * constant will always be returned. This can be used for debugging a site on
2921 * your localhost while not having to change the database to your URL.
2924 * @package WordPress
2927 * @param string $url URL to set the WordPress site location.
2928 * @return string The WordPress Site URL
2930 function _config_wp_siteurl( $url = '' ) {
2931 if ( defined( 'WP_SITEURL' ) )
2937 * Set the localized direction for MCE plugin.
2939 * Will only set the direction to 'rtl', if the WordPress locale has the text
2940 * direction set to 'rtl'.
2942 * Fills in the 'directionality', 'plugins', and 'theme_advanced_button1' array
2943 * keys. These keys are then returned in the $input array.
2946 * @package WordPress
2950 * @param array $input MCE plugin array.
2951 * @return array Direction set for 'rtl', if needed by locale.
2953 function _mce_set_direction( $input ) {
2955 $input['directionality'] = 'rtl';
2956 $input['plugins'] .= ',directionality';
2957 $input['theme_advanced_buttons1'] .= ',ltr';
2965 * Convert smiley code to the icon graphic file equivalent.
2967 * You can turn off smilies, by going to the write setting screen and unchecking
2968 * the box, or by setting 'use_smilies' option to false or removing the option.
2970 * Plugins may override the default smiley list by setting the $wpsmiliestrans
2971 * to an array, with the key the code the blogger types in and the value the
2974 * The $wp_smiliessearch global is for the regular expression and is set each
2975 * time the function is called.
2977 * The full list of smilies can be found in the function and won't be listed in
2978 * the description. Probably should create a Codex page for it, so that it is
2981 * @global array $wpsmiliestrans
2982 * @global array $wp_smiliessearch
2985 function smilies_init() {
2986 global $wpsmiliestrans, $wp_smiliessearch;
2988 // don't bother setting up smilies if they are disabled
2989 if ( !get_option( 'use_smilies' ) )
2992 if ( !isset( $wpsmiliestrans ) ) {
2993 $wpsmiliestrans = array(
2994 ':mrgreen:' => 'icon_mrgreen.gif',
2995 ':neutral:' => 'icon_neutral.gif',
2996 ':twisted:' => 'icon_twisted.gif',
2997 ':arrow:' => 'icon_arrow.gif',
2998 ':shock:' => 'icon_eek.gif',
2999 ':smile:' => 'icon_smile.gif',
3000 ':???:' => 'icon_confused.gif',
3001 ':cool:' => 'icon_cool.gif',
3002 ':evil:' => 'icon_evil.gif',
3003 ':grin:' => 'icon_biggrin.gif',
3004 ':idea:' => 'icon_idea.gif',
3005 ':oops:' => 'icon_redface.gif',
3006 ':razz:' => 'icon_razz.gif',
3007 ':roll:' => 'icon_rolleyes.gif',
3008 ':wink:' => 'icon_wink.gif',
3009 ':cry:' => 'icon_cry.gif',
3010 ':eek:' => 'icon_surprised.gif',
3011 ':lol:' => 'icon_lol.gif',
3012 ':mad:' => 'icon_mad.gif',
3013 ':sad:' => 'icon_sad.gif',
3014 '8-)' => 'icon_cool.gif',
3015 '8-O' => 'icon_eek.gif',
3016 ':-(' => 'icon_sad.gif',
3017 ':-)' => 'icon_smile.gif',
3018 ':-?' => 'icon_confused.gif',
3019 ':-D' => 'icon_biggrin.gif',
3020 ':-P' => 'icon_razz.gif',
3021 ':-o' => 'icon_surprised.gif',
3022 ':-x' => 'icon_mad.gif',
3023 ':-|' => 'icon_neutral.gif',
3024 ';-)' => 'icon_wink.gif',
3025 '8)' => 'icon_cool.gif',
3026 '8O' => 'icon_eek.gif',
3027 ':(' => 'icon_sad.gif',
3028 ':)' => 'icon_smile.gif',
3029 ':?' => 'icon_confused.gif',
3030 ':D' => 'icon_biggrin.gif',
3031 ':P' => 'icon_razz.gif',
3032 ':o' => 'icon_surprised.gif',
3033 ':x' => 'icon_mad.gif',
3034 ':|' => 'icon_neutral.gif',
3035 ';)' => 'icon_wink.gif',
3036 ':!:' => 'icon_exclaim.gif',
3037 ':?:' => 'icon_question.gif',
3041 if (count($wpsmiliestrans) == 0) {
3046 * NOTE: we sort the smilies in reverse key order. This is to make sure
3047 * we match the longest possible smilie (:???: vs :?) as the regular
3048 * expression used below is first-match
3050 krsort($wpsmiliestrans);
3052 $wp_smiliessearch = '/(?:\s|^)';
3055 foreach ( (array) $wpsmiliestrans as $smiley => $img ) {
3056 $firstchar = substr($smiley, 0, 1);
3057 $rest = substr($smiley, 1);
3060 if ($firstchar != $subchar) {
3061 if ($subchar != '') {
3062 $wp_smiliessearch .= ')|(?:\s|^)';
3064 $subchar = $firstchar;
3065 $wp_smiliessearch .= preg_quote($firstchar, '/') . '(?:';
3067 $wp_smiliessearch .= '|';
3069 $wp_smiliessearch .= preg_quote($rest, '/');
3072 $wp_smiliessearch .= ')(?:\s|$)/m';
3076 * Merge user defined arguments into defaults array.
3078 * This function is used throughout WordPress to allow for both string or array
3079 * to be merged into another array.
3083 * @param string|array $args Value to merge with $defaults
3084 * @param array $defaults Array that serves as the defaults.
3085 * @return array Merged user defined values with defaults.
3087 function wp_parse_args( $args, $defaults = '' ) {
3088 if ( is_object( $args ) )
3089 $r = get_object_vars( $args );
3090 elseif ( is_array( $args ) )
3093 wp_parse_str( $args, $r );
3095 if ( is_array( $defaults ) )
3096 return array_merge( $defaults, $r );
3101 * Clean up an array, comma- or space-separated list of IDs
3105 * @param array|string $list
3106 * @return array Sanitized array of IDs
3108 function wp_parse_id_list( $list ) {
3109 if ( !is_array($list) )
3110 $list = preg_split('/[\s,]+/', $list);
3112 return array_unique(array_map('absint', $list));
3116 * Extract a slice of an array, given a list of keys
3120 * @param array $array The original array
3121 * @param array $keys The list of keys
3122 * @return array The array slice
3124 function wp_array_slice_assoc( $array, $keys ) {
3126 foreach ( $keys as $key )
3127 if ( isset( $array[ $key ] ) )
3128 $slice[ $key ] = $array[ $key ];
3134 * Filters a list of objects, based on a set of key => value arguments
3138 * @param array $list An array of objects to filter
3139 * @param array $args An array of key => value arguments to match against each object
3140 * @param string $operator The logical operation to perform. 'or' means only one element
3141 * from the array needs to match; 'and' means all elements must match. The default is 'and'.
3142 * @param bool|string $field A field from the object to place instead of the entire object
3143 * @return array A list of objects or object fields
3145 function wp_filter_object_list( $list, $args = array(), $operator = 'and', $field = false ) {
3146 if ( ! is_array( $list ) )
3149 $list = wp_list_filter( $list, $args, $operator );
3152 $list = wp_list_pluck( $list, $field );
3158 * Filters a list of objects, based on a set of key => value arguments
3162 * @param array $list An array of objects to filter
3163 * @param array $args An array of key => value arguments to match against each object
3164 * @param string $operator The logical operation to perform:
3165 * 'AND' means all elements from the array must match;
3166 * 'OR' means only one element needs to match;
3167 * 'NOT' means no elements may match.
3168 * The default is 'AND'.
3171 function wp_list_filter( $list, $args = array(), $operator = 'AND' ) {
3172 if ( ! is_array( $list ) )
3175 if ( empty( $args ) )
3178 $operator = strtoupper( $operator );
3179 $count = count( $args );
3180 $filtered = array();
3182 foreach ( $list as $key => $obj ) {
3183 $matched = count( array_intersect_assoc( (array) $obj, $args ) );
3184 if ( ( 'AND' == $operator && $matched == $count )
3185 || ( 'OR' == $operator && $matched <= $count )
3186 || ( 'NOT' == $operator && 0 == $matched ) ) {
3187 $filtered[$key] = $obj;
3195 * Pluck a certain field out of each object in a list
3199 * @param array $list A list of objects or arrays
3200 * @param int|string $field A field from the object to place instead of the entire object
3203 function wp_list_pluck( $list, $field ) {
3204 foreach ( $list as $key => $value ) {
3205 $value = (array) $value;
3206 $list[ $key ] = $value[ $field ];
3213 * Determines if Widgets library should be loaded.
3215 * Checks to make sure that the widgets library hasn't already been loaded. If
3216 * it hasn't, then it will load the widgets library and run an action hook.
3219 * @uses add_action() Calls '_admin_menu' hook with 'wp_widgets_add_menu' value.
3221 function wp_maybe_load_widgets() {
3222 if ( ! apply_filters('load_default_widgets', true) )
3224 require_once( ABSPATH . WPINC . '/default-widgets.php' );
3225 add_action( '_admin_menu', 'wp_widgets_add_menu' );
3229 * Append the Widgets menu to the themes main menu.
3232 * @uses $submenu The administration submenu list.
3234 function wp_widgets_add_menu() {
3236 $submenu['themes.php'][7] = array( __( 'Widgets' ), 'edit_theme_options', 'widgets.php' );
3237 ksort( $submenu['themes.php'], SORT_NUMERIC );
3241 * Flush all output buffers for PHP 5.2.
3243 * Make sure all output buffers are flushed before our singletons our destroyed.
3247 function wp_ob_end_flush_all() {
3248 $levels = ob_get_level();
3249 for ($i=0; $i<$levels; $i++)
3254 * Load custom DB error or display WordPress DB error.
3256 * If a file exists in the wp-content directory named db-error.php, then it will
3257 * be loaded instead of displaying the WordPress DB error. If it is not found,
3258 * then the WordPress DB error will be displayed instead.
3260 * The WordPress DB error sets the HTTP status header to 500 to try to prevent
3261 * search engines from caching the message. Custom DB messages should do the
3264 * This function was backported to the the WordPress 2.3.2, but originally was
3265 * added in WordPress 2.5.0.
3270 function dead_db() {
3273 // Load custom DB error template, if present.
3274 if ( file_exists( WP_CONTENT_DIR . '/db-error.php' ) ) {
3275 require_once( WP_CONTENT_DIR . '/db-error.php' );
3279 // If installing or in the admin, provide the verbose message.
3280 if ( defined('WP_INSTALLING') || defined('WP_ADMIN') )
3281 wp_die($wpdb->error);
3283 // Otherwise, be terse.
3284 status_header( 500 );
3286 header( 'Content-Type: text/html; charset=utf-8' );
3288 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
3289 <html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) ) language_attributes(); ?>>
3291 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
3292 <title>Database Error</title>
3296 <h1>Error establishing a database connection</h1>
3304 * Converts value to nonnegative integer.
3308 * @param mixed $maybeint Data you wish to have convered to an nonnegative integer
3309 * @return int An nonnegative integer
3311 function absint( $maybeint ) {
3312 return abs( intval( $maybeint ) );
3316 * Determines if the blog can be accessed over SSL.
3318 * Determines if blog can be accessed over SSL by using cURL to access the site
3319 * using the https in the siteurl. Requires cURL extension to work correctly.
3323 * @param string $url
3324 * @return bool Whether SSL access is available
3326 function url_is_accessable_via_ssl($url)
3328 if (in_array('curl', get_loaded_extensions())) {
3329 $ssl = preg_replace( '/^http:\/\//', 'https://', $url );
3332 curl_setopt($ch, CURLOPT_URL, $ssl);
3333 curl_setopt($ch, CURLOPT_FAILONERROR, true);
3334 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
3335 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
3336 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
3340 $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
3343 if ($status == 200 || $status == 401) {
3351 * Marks a function as deprecated and informs when it has been used.
3353 * There is a hook deprecated_function_run that will be called that can be used
3354 * to get the backtrace up to what file and function called the deprecated
3357 * The current behavior is to trigger a user error if WP_DEBUG is true.
3359 * This function is to be used in every function that is deprecated.
3361 * @package WordPress
3366 * @uses do_action() Calls 'deprecated_function_run' and passes the function name, what to use instead,
3367 * and the version the function was deprecated in.
3368 * @uses apply_filters() Calls 'deprecated_function_trigger_error' and expects boolean value of true to do
3369 * trigger or false to not trigger error.
3371 * @param string $function The function that was called
3372 * @param string $version The version of WordPress that deprecated the function
3373 * @param string $replacement Optional. The function that should have been called
3375 function _deprecated_function( $function, $version, $replacement=null ) {
3377 do_action( 'deprecated_function_run', $function, $replacement, $version );
3379 // Allow plugin to filter the output error trigger
3380 if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) {
3381 if ( ! is_null($replacement) )
3382 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $function, $version, $replacement ) );
3384 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
3389 * Marks a file as deprecated and informs when it has been used.
3391 * There is a hook deprecated_file_included that will be called that can be used
3392 * to get the backtrace up to what file and function included the deprecated
3395 * The current behavior is to trigger a user error if WP_DEBUG is true.
3397 * This function is to be used in every file that is deprecated.
3399 * @package WordPress
3404 * @uses do_action() Calls 'deprecated_file_included' and passes the file name, what to use instead,
3405 * the version in which the file was deprecated, and any message regarding the change.
3406 * @uses apply_filters() Calls 'deprecated_file_trigger_error' and expects boolean value of true to do
3407 * trigger or false to not trigger error.
3409 * @param string $file The file that was included
3410 * @param string $version The version of WordPress that deprecated the file
3411 * @param string $replacement Optional. The file that should have been included based on ABSPATH
3412 * @param string $message Optional. A message regarding the change
3414 function _deprecated_file( $file, $version, $replacement = null, $message = '' ) {
3416 do_action( 'deprecated_file_included', $file, $replacement, $version, $message );
3418 // Allow plugin to filter the output error trigger
3419 if ( WP_DEBUG && apply_filters( 'deprecated_file_trigger_error', true ) ) {
3420 $message = empty( $message ) ? '' : ' ' . $message;
3421 if ( ! is_null( $replacement ) )
3422 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) . $message );
3424 trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) . $message );
3428 * Marks a function argument as deprecated and informs when it has been used.
3430 * This function is to be used whenever a deprecated function argument is used.
3431 * Before this function is called, the argument must be checked for whether it was
3432 * used by comparing it to its default value or evaluating whether it is empty.
3435 * if ( !empty($deprecated) )
3436 * _deprecated_argument( __FUNCTION__, '3.0' );
3439 * There is a hook deprecated_argument_run that will be called that can be used
3440 * to get the backtrace up to what file and function used the deprecated
3443 * The current behavior is to trigger a user error if WP_DEBUG is true.
3445 * @package WordPress
3450 * @uses do_action() Calls 'deprecated_argument_run' and passes the function name, a message on the change,
3451 * and the version in which the argument was deprecated.
3452 * @uses apply_filters() Calls 'deprecated_argument_trigger_error' and expects boolean value of true to do
3453 * trigger or false to not trigger error.
3455 * @param string $function The function that was called
3456 * @param string $version The version of WordPress that deprecated the argument used
3457 * @param string $message Optional. A message regarding the change.
3459 function _deprecated_argument( $function, $version, $message = null ) {
3461 do_action( 'deprecated_argument_run', $function, $message, $version );
3463 // Allow plugin to filter the output error trigger
3464 if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) {
3465 if ( ! is_null( $message ) )
3466 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) );
3468 trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) );
3473 * Marks something as being incorrectly called.
3475 * There is a hook doing_it_wrong_run that will be called that can be used
3476 * to get the backtrace up to what file and function called the deprecated
3479 * The current behavior is to trigger a user error if WP_DEBUG is true.
3481 * @package WordPress
3486 * @uses do_action() Calls 'doing_it_wrong_run' and passes the function arguments.
3487 * @uses apply_filters() Calls 'doing_it_wrong_trigger_error' and expects boolean value of true to do
3488 * trigger or false to not trigger error.
3490 * @param string $function The function that was called.
3491 * @param string $message A message explaining what has been done incorrectly.
3492 * @param string $version The version of WordPress where the message was added.
3494 function _doing_it_wrong( $function, $message, $version ) {
3496 do_action( 'doing_it_wrong_run', $function, $message, $version );
3498 // Allow plugin to filter the output error trigger
3499 if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
3500 $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
3501 trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
3506 * Is the server running earlier than 1.5.0 version of lighttpd
3510 * @return bool Whether the server is running lighttpd < 1.5.0
3512 function is_lighttpd_before_150() {
3513 $server_parts = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] )? $_SERVER['SERVER_SOFTWARE'] : '' );
3514 $server_parts[1] = isset( $server_parts[1] )? $server_parts[1] : '';
3515 return 'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
3519 * Does the specified module exist in the apache config?
3523 * @param string $mod e.g. mod_rewrite
3524 * @param bool $default The default return value if the module is not found
3527 function apache_mod_loaded($mod, $default = false) {
3533 if ( function_exists('apache_get_modules') ) {
3534 $mods = apache_get_modules();
3535 if ( in_array($mod, $mods) )
3537 } elseif ( function_exists('phpinfo') ) {
3540 $phpinfo = ob_get_clean();
3541 if ( false !== strpos($phpinfo, $mod) )
3548 * Check if IIS 7 supports pretty permalinks
3554 function iis7_supports_permalinks() {
3557 $supports_permalinks = false;
3559 /* First we check if the DOMDocument class exists. If it does not exist,
3560 * which is the case for PHP 4.X, then we cannot easily update the xml configuration file,
3561 * hence we just bail out and tell user that pretty permalinks cannot be used.
3562 * This is not a big issue because PHP 4.X is going to be depricated and for IIS it
3563 * is recommended to use PHP 5.X NTS.
3564 * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
3565 * URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
3566 * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
3567 * via ISAPI then pretty permalinks will not work.
3569 $supports_permalinks = class_exists('DOMDocument') && isset($_SERVER['IIS_UrlRewriteModule']) && ( php_sapi_name() == 'cgi-fcgi' );
3572 return apply_filters('iis7_supports_permalinks', $supports_permalinks);
3576 * File validates against allowed set of defined rules.
3578 * A return value of '1' means that the $file contains either '..' or './'. A
3579 * return value of '2' means that the $file contains ':' after the first
3580 * character. A return value of '3' means that the file is not in the allowed
3585 * @param string $file File path.
3586 * @param array $allowed_files List of allowed files.
3587 * @return int 0 means nothing is wrong, greater than 0 means something was wrong.
3589 function validate_file( $file, $allowed_files = '' ) {
3590 if ( false !== strpos( $file, '..' ))
3593 if ( false !== strpos( $file, './' ))
3596 if (!empty ( $allowed_files ) && (!in_array( $file, $allowed_files ) ) )
3599 if (':' == substr( $file, 1, 1 ))
3606 * Determine if SSL is used.
3610 * @return bool True if SSL, false if not used.
3613 if ( isset($_SERVER['HTTPS']) ) {
3614 if ( 'on' == strtolower($_SERVER['HTTPS']) )
3616 if ( '1' == $_SERVER['HTTPS'] )
3618 } elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
3625 * Whether SSL login should be forced.
3629 * @param string|bool $force Optional.
3630 * @return bool True if forced, false if not forced.
3632 function force_ssl_login( $force = null ) {
3633 static $forced = false;
3635 if ( !is_null( $force ) ) {
3636 $old_forced = $forced;
3645 * Whether to force SSL used for the Administration Screens.
3649 * @param string|bool $force
3650 * @return bool True if forced, false if not forced.
3652 function force_ssl_admin( $force = null ) {
3653 static $forced = false;
3655 if ( !is_null( $force ) ) {
3656 $old_forced = $forced;
3665 * Guess the URL for the site.
3667 * Will remove wp-admin links to retrieve only return URLs not in the wp-admin
3674 function wp_guess_url() {
3675 if ( defined('WP_SITEURL') && '' != WP_SITEURL ) {
3678 $schema = is_ssl() ? 'https://' : 'http://';
3679 $url = preg_replace('|/wp-admin/.*|i', '', $schema . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
3681 return rtrim($url, '/');
3685 * Suspend cache invalidation.
3687 * Turns cache invalidation on and off. Useful during imports where you don't wont to do invalidations
3688 * every time a post is inserted. Callers must be sure that what they are doing won't lead to an inconsistent
3689 * cache when invalidation is suspended.
3693 * @param bool $suspend Whether to suspend or enable cache invalidation
3694 * @return bool The current suspend setting
3696 function wp_suspend_cache_invalidation($suspend = true) {
3697 global $_wp_suspend_cache_invalidation;
3699 $current_suspend = $_wp_suspend_cache_invalidation;
3700 $_wp_suspend_cache_invalidation = $suspend;
3701 return $current_suspend;
3705 * Retrieve site option value based on name of option.
3708 * @package WordPress
3709 * @subpackage Option
3712 * @uses apply_filters() Calls 'pre_site_option_$option' before checking the option.
3713 * Any value other than false will "short-circuit" the retrieval of the option
3714 * and return the returned value.
3715 * @uses apply_filters() Calls 'site_option_$option', after checking the option, with
3718 * @param string $option Name of option to retrieve. Expected to not be SQL-escaped.
3719 * @param mixed $default Optional value to return if option doesn't exist. Default false.
3720 * @param bool $use_cache Whether to use cache. Multisite only. Default true.
3721 * @return mixed Value set for the option.
3723 function get_site_option( $option, $default = false, $use_cache = true ) {
3726 // Allow plugins to short-circuit site options.
3727 $pre = apply_filters( 'pre_site_option_' . $option, false );
3728 if ( false !== $pre )
3731 if ( !is_multisite() ) {
3732 $value = get_option($option, $default);
3734 $cache_key = "{$wpdb->siteid}:$option";
3736 $value = wp_cache_get($cache_key, 'site-options');
3738 if ( !isset($value) || (false === $value) ) {
3739 $row = $wpdb->get_row( $wpdb->prepare("SELECT meta_value FROM $wpdb->sitemeta WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) );
3741 // Has to be get_row instead of get_var because of funkiness with 0, false, null values
3742 if ( is_object( $row ) )
3743 $value = $row->meta_value;
3747 $value = maybe_unserialize( $value );
3749 wp_cache_set( $cache_key, $value, 'site-options' );
3753 return apply_filters( 'site_option_' . $option, $value );
3757 * Add a new site option.
3760 * @package WordPress
3761 * @subpackage Option
3764 * @uses apply_filters() Calls 'pre_add_site_option_$option' hook to allow overwriting the
3765 * option value to be stored.
3766 * @uses do_action() Calls 'add_site_option_$option' and 'add_site_option' hooks on success.
3768 * @param string $option Name of option to add. Expected to not be SQL-escaped.
3769 * @param mixed $value Optional. Option value, can be anything. Expected to not be SQL-escaped.
3770 * @return bool False if option was not added and true if option was added.
3772 function add_site_option( $option, $value ) {
3775 $value = apply_filters( 'pre_add_site_option_' . $option, $value );
3777 if ( !is_multisite() ) {
3778 $result = add_option( $option, $value );
3780 $cache_key = "{$wpdb->siteid}:$option";
3782 if ( $wpdb->get_row( $wpdb->prepare( "SELECT meta_value FROM $wpdb->sitemeta WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) ) )
3783 return update_site_option( $option, $value );
3785 $value = sanitize_option( $option, $value );
3786 wp_cache_set( $cache_key, $value, 'site-options' );
3789 $value = maybe_serialize($value);
3790 $result = $wpdb->insert( $wpdb->sitemeta, array('site_id' => $wpdb->siteid, 'meta_key' => $option, 'meta_value' => $value ) );
3794 do_action( "add_site_option_{$option}", $option, $value );
3795 do_action( "add_site_option", $option, $value );
3801 * Removes site option by name.
3803 * @see delete_option()
3804 * @package WordPress
3805 * @subpackage Option
3808 * @uses do_action() Calls 'pre_delete_site_option_$option' hook before option is deleted.
3809 * @uses do_action() Calls 'delete_site_option' and 'delete_site_option_$option'
3812 * @param string $option Name of option to remove. Expected to not be SQL-escaped.
3813 * @return bool True, if succeed. False, if failure.
3815 function delete_site_option( $option ) {
3818 // ms_protect_special_option( $option ); @todo
3820 do_action( 'pre_delete_site_option_' . $option );
3822 if ( !is_multisite() ) {
3823 $result = delete_option( $option );
3825 $row = $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) );
3826 if ( is_null( $row ) || !$row->meta_id )
3828 $cache_key = "{$wpdb->siteid}:$option";
3829 wp_cache_delete( $cache_key, 'site-options' );
3831 $result = $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) );
3835 do_action( "delete_site_option_{$option}", $option );
3836 do_action( "delete_site_option", $option );
3843 * Update the value of a site option that was already added.
3845 * @see update_option()
3847 * @package WordPress
3848 * @subpackage Option
3850 * @uses apply_filters() Calls 'pre_update_site_option_$option' hook to allow overwriting the
3851 * option value to be stored.
3852 * @uses do_action() Calls 'update_site_option_$option' and 'update_site_option' hooks on success.
3854 * @param string $option Name of option. Expected to not be SQL-escaped.
3855 * @param mixed $value Option value. Expected to not be SQL-escaped.
3856 * @return bool False if value was not updated and true if value was updated.
3858 function update_site_option( $option, $value ) {
3861 $oldvalue = get_site_option( $option );
3862 $value = apply_filters( 'pre_update_site_option_' . $option, $value, $oldvalue );
3864 if ( $value === $oldvalue )
3867 if ( !is_multisite() ) {
3868 $result = update_option( $option, $value );
3870 $cache_key = "{$wpdb->siteid}:$option";
3872 if ( $value && !$wpdb->get_row( $wpdb->prepare( "SELECT meta_value FROM $wpdb->sitemeta WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) ) )
3873 return add_site_option( $option, $value );
3874 $value = sanitize_option( $option, $value );
3875 wp_cache_set( $cache_key, $value, 'site-options' );
3878 $value = maybe_serialize( $value );
3879 $result = $wpdb->update( $wpdb->sitemeta, array( 'meta_value' => $value ), array( 'site_id' => $wpdb->siteid, 'meta_key' => $option ) );
3884 do_action( "update_site_option_{$option}", $option, $value );
3885 do_action( "update_site_option", $option, $value );
3892 * Delete a site transient
3895 * @package WordPress
3896 * @subpackage Transient
3898 * @uses do_action() Calls 'delete_site_transient_$transient' hook before transient is deleted.
3899 * @uses do_action() Calls 'deleted_site_transient' hook on success.
3901 * @param string $transient Transient name. Expected to not be SQL-escaped.
3902 * @return bool True if successful, false otherwise
3904 function delete_site_transient( $transient ) {
3905 global $_wp_using_ext_object_cache;
3907 do_action( 'delete_site_transient_' . $transient, $transient );
3908 if ( $_wp_using_ext_object_cache ) {
3909 $result = wp_cache_delete( $transient, 'site-transient' );
3911 $option_timeout = '_site_transient_timeout_' . $transient;
3912 $option = '_site_transient_' . $transient;
3913 $result = delete_site_option( $option );
3915 delete_site_option( $option_timeout );
3918 do_action( 'deleted_site_transient', $transient );
3923 * Get the value of a site transient
3925 * If the transient does not exist or does not have a value, then the return value
3928 * @see get_transient()
3930 * @package WordPress
3931 * @subpackage Transient
3933 * @uses apply_filters() Calls 'pre_site_transient_$transient' hook before checking the transient.
3934 * Any value other than false will "short-circuit" the retrieval of the transient
3935 * and return the returned value.
3936 * @uses apply_filters() Calls 'site_transient_$option' hook, after checking the transient, with
3937 * the transient value.
3939 * @param string $transient Transient name. Expected to not be SQL-escaped.
3940 * @return mixed Value of transient
3942 function get_site_transient( $transient ) {
3943 global $_wp_using_ext_object_cache;
3945 $pre = apply_filters( 'pre_site_transient_' . $transient, false );
3946 if ( false !== $pre )
3949 if ( $_wp_using_ext_object_cache ) {
3950 $value = wp_cache_get( $transient, 'site-transient' );
3952 // Core transients that do not have a timeout. Listed here so querying timeouts can be avoided.
3953 $no_timeout = array('update_core', 'update_plugins', 'update_themes');
3954 $transient_option = '_site_transient_' . $transient;
3955 if ( ! in_array( $transient, $no_timeout ) ) {
3956 $transient_timeout = '_site_transient_timeout_' . $transient;
3957 $timeout = get_site_option( $transient_timeout );
3958 if ( false !== $timeout && $timeout < time() ) {
3959 delete_site_option( $transient_option );
3960 delete_site_option( $transient_timeout );
3965 $value = get_site_option( $transient_option );
3968 return apply_filters( 'site_transient_' . $transient, $value );
3972 * Set/update the value of a site transient
3974 * You do not need to serialize values, if the value needs to be serialize, then
3975 * it will be serialized before it is set.
3977 * @see set_transient()
3979 * @package WordPress
3980 * @subpackage Transient
3982 * @uses apply_filters() Calls 'pre_set_site_transient_$transient' hook to allow overwriting the
3983 * transient value to be stored.
3984 * @uses do_action() Calls 'set_site_transient_$transient' and 'setted_site_transient' hooks on success.
3986 * @param string $transient Transient name. Expected to not be SQL-escaped.
3987 * @param mixed $value Transient value. Expected to not be SQL-escaped.
3988 * @param int $expiration Time until expiration in seconds, default 0
3989 * @return bool False if value was not set and true if value was set.
3991 function set_site_transient( $transient, $value, $expiration = 0 ) {
3992 global $_wp_using_ext_object_cache;
3994 $value = apply_filters( 'pre_set_site_transient_' . $transient, $value );
3996 if ( $_wp_using_ext_object_cache ) {
3997 $result = wp_cache_set( $transient, $value, 'site-transient', $expiration );
3999 $transient_timeout = '_site_transient_timeout_' . $transient;
4000 $transient = '_site_transient_' . $transient;
4001 if ( false === get_site_option( $transient ) ) {
4003 add_site_option( $transient_timeout, time() + $expiration );
4004 $result = add_site_option( $transient, $value );
4007 update_site_option( $transient_timeout, time() + $expiration );
4008 $result = update_site_option( $transient, $value );
4012 do_action( 'set_site_transient_' . $transient );
4013 do_action( 'setted_site_transient', $transient );
4023 * @package WordPress
4025 * @param int $blog_id optional blog id to test (default current blog)
4026 * @return bool True if not multisite or $blog_id is main site
4028 function is_main_site( $blog_id = '' ) {
4029 global $current_site, $current_blog;
4031 if ( !is_multisite() )
4035 $blog_id = $current_blog->blog_id;
4037 return $blog_id == $current_site->blog_id;
4041 * Whether global terms are enabled.
4045 * @package WordPress
4047 * @return bool True if multisite and global terms enabled
4049 function global_terms_enabled() {
4050 if ( ! is_multisite() )
4053 static $global_terms = null;
4054 if ( is_null( $global_terms ) ) {
4055 $filter = apply_filters( 'global_terms_enabled', null );
4056 if ( ! is_null( $filter ) )
4057 $global_terms = (bool) $filter;
4059 $global_terms = (bool) get_site_option( 'global_terms_enabled', false );
4061 return $global_terms;
4065 * gmt_offset modification for smart timezone handling
4067 * Overrides the gmt_offset option if we have a timezone_string available
4071 * @return float|bool
4073 function wp_timezone_override_offset() {
4074 if ( !$timezone_string = get_option( 'timezone_string' ) ) {
4078 $timezone_object = timezone_open( $timezone_string );
4079 $datetime_object = date_create();
4080 if ( false === $timezone_object || false === $datetime_object ) {
4083 return round( timezone_offset_get( $timezone_object, $datetime_object ) / 3600, 2 );
4087 * {@internal Missing Short Description}}
4091 * @param unknown_type $a
4092 * @param unknown_type $b
4095 function _wp_timezone_choice_usort_callback( $a, $b ) {
4096 // Don't use translated versions of Etc
4097 if ( 'Etc' === $a['continent'] && 'Etc' === $b['continent'] ) {
4098 // Make the order of these more like the old dropdown
4099 if ( 'GMT+' === substr( $a['city'], 0, 4 ) && 'GMT+' === substr( $b['city'], 0, 4 ) ) {
4100 return -1 * ( strnatcasecmp( $a['city'], $b['city'] ) );
4102 if ( 'UTC' === $a['city'] ) {
4103 if ( 'GMT+' === substr( $b['city'], 0, 4 ) ) {
4108 if ( 'UTC' === $b['city'] ) {
4109 if ( 'GMT+' === substr( $a['city'], 0, 4 ) ) {
4114 return strnatcasecmp( $a['city'], $b['city'] );
4116 if ( $a['t_continent'] == $b['t_continent'] ) {
4117 if ( $a['t_city'] == $b['t_city'] ) {
4118 return strnatcasecmp( $a['t_subcity'], $b['t_subcity'] );
4120 return strnatcasecmp( $a['t_city'], $b['t_city'] );
4122 // Force Etc to the bottom of the list
4123 if ( 'Etc' === $a['continent'] ) {
4126 if ( 'Etc' === $b['continent'] ) {
4129 return strnatcasecmp( $a['t_continent'], $b['t_continent'] );
4134 * Gives a nicely formatted list of timezone strings // temporary! Not in final
4138 * @param string $selected_zone Selected Zone
4141 function wp_timezone_choice( $selected_zone ) {
4142 static $mo_loaded = false;
4144 $continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific');
4146 // Load translations for continents and cities
4147 if ( !$mo_loaded ) {
4148 $locale = get_locale();
4149 $mofile = WP_LANG_DIR . '/continents-cities-' . $locale . '.mo';
4150 load_textdomain( 'continents-cities', $mofile );
4155 foreach ( timezone_identifiers_list() as $zone ) {
4156 $zone = explode( '/', $zone );
4157 if ( !in_array( $zone[0], $continents ) ) {
4161 // This determines what gets set and translated - we don't translate Etc/* strings here, they are done later
4163 0 => ( isset( $zone[0] ) && $zone[0] ),
4164 1 => ( isset( $zone[1] ) && $zone[1] ),
4165 2 => ( isset( $zone[2] ) && $zone[2] ),
4167 $exists[3] = ( $exists[0] && 'Etc' !== $zone[0] );
4168 $exists[4] = ( $exists[1] && $exists[3] );
4169 $exists[5] = ( $exists[2] && $exists[3] );
4172 'continent' => ( $exists[0] ? $zone[0] : '' ),
4173 'city' => ( $exists[1] ? $zone[1] : '' ),
4174 'subcity' => ( $exists[2] ? $zone[2] : '' ),
4175 't_continent' => ( $exists[3] ? translate( str_replace( '_', ' ', $zone[0] ), 'continents-cities' ) : '' ),
4176 't_city' => ( $exists[4] ? translate( str_replace( '_', ' ', $zone[1] ), 'continents-cities' ) : '' ),
4177 't_subcity' => ( $exists[5] ? translate( str_replace( '_', ' ', $zone[2] ), 'continents-cities' ) : '' )
4180 usort( $zonen, '_wp_timezone_choice_usort_callback' );
4182 $structure = array();
4184 if ( empty( $selected_zone ) ) {
4185 $structure[] = '<option selected="selected" value="">' . __( 'Select a city' ) . '</option>';
4188 foreach ( $zonen as $key => $zone ) {
4189 // Build value in an array to join later
4190 $value = array( $zone['continent'] );
4192 if ( empty( $zone['city'] ) ) {
4193 // It's at the continent level (generally won't happen)
4194 $display = $zone['t_continent'];
4196 // It's inside a continent group
4198 // Continent optgroup
4199 if ( !isset( $zonen[$key - 1] ) || $zonen[$key - 1]['continent'] !== $zone['continent'] ) {
4200 $label = $zone['t_continent'];
4201 $structure[] = '<optgroup label="'. esc_attr( $label ) .'">';
4204 // Add the city to the value
4205 $value[] = $zone['city'];
4207 $display = $zone['t_city'];
4208 if ( !empty( $zone['subcity'] ) ) {
4209 // Add the subcity to the value
4210 $value[] = $zone['subcity'];
4211 $display .= ' - ' . $zone['t_subcity'];
4216 $value = join( '/', $value );
4218 if ( $value === $selected_zone ) {
4219 $selected = 'selected="selected" ';
4221 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $value ) . '">' . esc_html( $display ) . "</option>";
4223 // Close continent optgroup
4224 if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) {
4225 $structure[] = '</optgroup>';
4230 $structure[] = '<optgroup label="'. esc_attr__( 'UTC' ) .'">';
4232 if ( 'UTC' === $selected_zone )
4233 $selected = 'selected="selected" ';
4234 $structure[] = '<option ' . $selected . 'value="' . esc_attr( 'UTC' ) . '">' . __('UTC') . '</option>';
4235 $structure[] = '</optgroup>';
4237 // Do manual UTC offsets
4238 $structure[] = '<optgroup label="'. esc_attr__( 'Manual Offsets' ) .'">';
4239 $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,
4240 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);
4241 foreach ( $offset_range as $offset ) {
4243 $offset_name = '+' . $offset;
4245 $offset_name = (string) $offset;
4247 $offset_value = $offset_name;
4248 $offset_name = str_replace(array('.25','.5','.75'), array(':15',':30',':45'), $offset_name);
4249 $offset_name = 'UTC' . $offset_name;
4250 $offset_value = 'UTC' . $offset_value;
4252 if ( $offset_value === $selected_zone )
4253 $selected = 'selected="selected" ';
4254 $structure[] = '<option ' . $selected . 'value="' . esc_attr( $offset_value ) . '">' . esc_html( $offset_name ) . "</option>";
4257 $structure[] = '</optgroup>';
4259 return join( "\n", $structure );
4263 * Strip close comment and close php tags from file headers used by WP
4264 * See http://core.trac.wordpress.org/ticket/8497
4268 * @param string $str
4271 function _cleanup_header_comment($str) {
4272 return trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $str));
4276 * Permanently deletes posts, pages, attachments, and comments which have been in the trash for EMPTY_TRASH_DAYS.
4280 function wp_scheduled_delete() {
4283 $delete_timestamp = time() - (60*60*24*EMPTY_TRASH_DAYS);
4285 $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);
4287 foreach ( (array) $posts_to_delete as $post ) {
4288 $post_id = (int) $post['post_id'];
4292 $del_post = get_post($post_id);
4294 if ( !$del_post || 'trash' != $del_post->post_status ) {
4295 delete_post_meta($post_id, '_wp_trash_meta_status');
4296 delete_post_meta($post_id, '_wp_trash_meta_time');
4298 wp_delete_post($post_id);
4302 $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);
4304 foreach ( (array) $comments_to_delete as $comment ) {
4305 $comment_id = (int) $comment['comment_id'];
4309 $del_comment = get_comment($comment_id);
4311 if ( !$del_comment || 'trash' != $del_comment->comment_approved ) {
4312 delete_comment_meta($comment_id, '_wp_trash_meta_time');
4313 delete_comment_meta($comment_id, '_wp_trash_meta_status');
4315 wp_delete_comment($comment_id);
4321 * Retrieve metadata from a file.
4323 * Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
4324 * Each piece of metadata must be on its own line. Fields can not span multple
4325 * lines, the value will get cut at the end of the first line.
4327 * If the file data is not within that first 8kiB, then the author should correct
4328 * their plugin file and move the data headers to the top.
4330 * @see http://codex.wordpress.org/File_Header
4333 * @param string $file Path to the file
4334 * @param array $default_headers List of headers, in the format array('HeaderKey' => 'Header Name')
4335 * @param string $context If specified adds filter hook "extra_{$context}_headers"
4337 function get_file_data( $file, $default_headers, $context = '' ) {
4338 // We don't need to write to the file, so just open for reading.
4339 $fp = fopen( $file, 'r' );
4341 // Pull only the first 8kiB of the file in.
4342 $file_data = fread( $fp, 8192 );
4344 // PHP will close file handle, but we are good citizens.
4347 if ( $context != '' ) {
4348 $extra_headers = apply_filters( "extra_{$context}_headers", array() );
4350 $extra_headers = array_flip( $extra_headers );
4351 foreach( $extra_headers as $key=>$value ) {
4352 $extra_headers[$key] = $key;
4354 $all_headers = array_merge( $extra_headers, (array) $default_headers );
4356 $all_headers = $default_headers;
4359 foreach ( $all_headers as $field => $regex ) {
4360 preg_match( '/^[ \t\/*#@]*' . preg_quote( $regex, '/' ) . ':(.*)$/mi', $file_data, ${$field});
4361 if ( !empty( ${$field} ) )
4362 ${$field} = _cleanup_header_comment( ${$field}[1] );
4367 $file_data = compact( array_keys( $all_headers ) );
4373 * Used internally to tidy up the search terms
4381 function _search_terms_tidy($t) {
4382 return trim($t, "\"'\n\r ");
4388 * Useful for returning true to filters easily
4391 * @see __return_false()
4394 function __return_true() {
4401 * Useful for returning false to filters easily
4404 * @see __return_true()
4405 * @return bool false
4407 function __return_false() {
4414 * Useful for returning 0 to filters easily
4417 * @see __return_zero()
4420 function __return_zero() {
4425 * Returns an empty array
4427 * Useful for returning an empty array to filters easily
4430 * @see __return_zero()
4431 * @return array Empty array
4433 function __return_empty_array() {
4438 * Send a HTTP header to disable content type sniffing in browsers which support it.
4440 * @link http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
4441 * @link http://src.chromium.org/viewvc/chrome?view=rev&revision=6985
4446 function send_nosniff_header() {
4447 @header( 'X-Content-Type-Options: nosniff' );
4451 * Returns a MySQL expression for selecting the week number based on the start_of_week option.
4455 * @param string $column
4458 function _wp_mysql_week( $column ) {
4459 switch ( $start_of_week = (int) get_option( 'start_of_week' ) ) {
4462 return "WEEK( $column, 0 )";
4464 return "WEEK( $column, 1 )";
4470 return "WEEK( DATE_SUB( $column, INTERVAL $start_of_week DAY ), 0 )";
4475 * Finds hierarchy loops using a callback function that maps object IDs to parent IDs.
4480 * @param callback $callback function that accepts ( ID, $callback_args ) and outputs parent_ID
4481 * @param int $start The ID to start the loop check at
4482 * @param int $start_parent the parent_ID of $start to use instead of calling $callback( $start ). Use null to always use $callback
4483 * @param array $callback_args optional additional arguments to send to $callback
4484 * @return array IDs of all members of loop
4486 function wp_find_hierarchy_loop( $callback, $start, $start_parent, $callback_args = array() ) {
4487 $override = is_null( $start_parent ) ? array() : array( $start => $start_parent );
4489 if ( !$arbitrary_loop_member = wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override, $callback_args ) )
4492 return wp_find_hierarchy_loop_tortoise_hare( $callback, $arbitrary_loop_member, $override, $callback_args, true );
4496 * Uses the "The Tortoise and the Hare" algorithm to detect loops.
4498 * For every step of the algorithm, the hare takes two steps and the tortoise one.
4499 * If the hare ever laps the tortoise, there must be a loop.
4504 * @param callback $callback function that accupts ( ID, callback_arg, ... ) and outputs parent_ID
4505 * @param int $start The ID to start the loop check at
4506 * @param array $override an array of ( ID => parent_ID, ... ) to use instead of $callback
4507 * @param array $callback_args optional additional arguments to send to $callback
4508 * @param bool $_return_loop Return loop members or just detect presence of loop?
4509 * Only set to true if you already know the given $start is part of a loop
4510 * (otherwise the returned array might include branches)
4511 * @return mixed scalar ID of some arbitrary member of the loop, or array of IDs of all members of loop if $_return_loop
4513 function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = array(), $callback_args = array(), $_return_loop = false ) {
4514 $tortoise = $hare = $evanescent_hare = $start;
4517 // Set evanescent_hare to one past hare
4518 // Increment hare two steps
4522 ( $evanescent_hare = isset( $override[$hare] ) ? $override[$hare] : call_user_func_array( $callback, array_merge( array( $hare ), $callback_args ) ) )
4524 ( $hare = isset( $override[$evanescent_hare] ) ? $override[$evanescent_hare] : call_user_func_array( $callback, array_merge( array( $evanescent_hare ), $callback_args ) ) )
4526 if ( $_return_loop )
4527 $return[$tortoise] = $return[$evanescent_hare] = $return[$hare] = true;
4529 // tortoise got lapped - must be a loop
4530 if ( $tortoise == $evanescent_hare || $tortoise == $hare )
4531 return $_return_loop ? $return : $tortoise;
4533 // Increment tortoise by one step
4534 $tortoise = isset( $override[$tortoise] ) ? $override[$tortoise] : call_user_func_array( $callback, array_merge( array( $tortoise ), $callback_args ) );
4541 * Send a HTTP header to limit rendering of pages to same origin iframes.
4543 * @link https://developer.mozilla.org/en/the_x-frame-options_response_header
4548 function send_frame_options_header() {
4549 @header( 'X-Frame-Options: SAMEORIGIN' );