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<?php
/**
* Main WordPress API
*
* @package WordPress
*/
// Don't load directly.
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
require ABSPATH . WPINC . '/option.php';
/**
* Converts given MySQL date string into a different format.
*
* - `$format` should be a PHP date format string.
* - 'U' and 'G' formats will return an integer sum of timestamp with timezone offset.
* - `$date` is expected to be local time in MySQL format (`Y-m-d H:i:s`).
*
* Historically UTC time could be passed to the function to produce Unix timestamp.
*
* If `$translate` is true then the given date and format string will
* be passed to `wp_date()` for translation.
*
* @since 0.71
*
* @param string $format Format of the date to return.
* @param string $date Date string to convert.
* @param bool $translate Whether the return date should be translated. Default true.
* @return string|int|false Integer if `$format` is 'U' or 'G', string otherwise.
* False on failure.
*/
function mysql2date( $format, $date, $translate = true ) {
if ( empty( $date ) ) {
return false;
}
$timezone = wp_timezone();
$datetime = date_create( $date, $timezone );
if ( false === $datetime ) {
return false;
}
// Returns a sum of timestamp with timezone offset. Ideally should never be used.
if ( 'G' === $format || 'U' === $format ) {
return $datetime->getTimestamp() + $datetime->getOffset();
}
if ( $translate ) {
return wp_date( $format, $datetime->getTimestamp(), $timezone );
}
return $datetime->format( $format );
}
/**
* Retrieves the current time based on specified type.
*
* - The 'mysql' type will return the time in the format for MySQL DATETIME field.
* - The 'timestamp' or 'U' types will return the current timestamp or a sum of timestamp
* and timezone offset, depending on `$gmt`.
* - Other strings will be interpreted as PHP date formats (e.g. 'Y-m-d').
*
* If `$gmt` is a truthy value then both types will use GMT time, otherwise the
* output is adjusted with the GMT offset for the site.
*
* @since 1.0.0
* @since 5.3.0 Now returns an integer if `$type` is 'U'. Previously a string was returned.
*
* @param string $type Type of time to retrieve. Accepts 'mysql', 'timestamp', 'U',
* or PHP date format string (e.g. 'Y-m-d').
* @param bool $gmt Optional. Whether to use GMT timezone. Default false.
* @return int|string Integer if `$type` is 'timestamp' or 'U', string otherwise.
*/
function current_time( $type, $gmt = false ) {
// Don't use non-GMT timestamp, unless you know the difference and really need to.
if ( 'timestamp' === $type || 'U' === $type ) {
return $gmt ? time() : time() + (int) ( (float) get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
}
if ( 'mysql' === $type ) {
$type = 'Y-m-d H:i:s';
}
$timezone = $gmt ? new DateTimeZone( 'UTC' ) : wp_timezone();
$datetime = new DateTime( 'now', $timezone );
return $datetime->format( $type );
}
/**
* Retrieves the current time as an object using the site's timezone.
*
* @since 5.3.0
*
* @return DateTimeImmutable Date and time object.
*/
function current_datetime() {
return new DateTimeImmutable( 'now', wp_timezone() );
}
/**
* Retrieves the timezone of the site as a string.
*
* Uses the `timezone_string` option to get a proper timezone name if available,
* otherwise falls back to a manual UTC ± offset.
*
* Example return values:
*
* - 'Europe/Rome'
* - 'America/North_Dakota/New_Salem'
* - 'UTC'
* - '-06:30'
* - '+00:00'
* - '+08:45'
*
* @since 5.3.0
*
* @return string PHP timezone name or a ±HH:MM offset.
*/
function wp_timezone_string() {
$timezone_string = get_option( 'timezone_string' );
if ( $timezone_string ) {
return $timezone_string;
}
$offset = (float) get_option( 'gmt_offset' );
$hours = (int) $offset;
$minutes = ( $offset - $hours );
$sign = ( $offset < 0 ) ? '-' : '+';
$abs_hour = abs( $hours );
$abs_mins = abs( $minutes * 60 );
$tz_offset = sprintf( '%s%02d:%02d', $sign, $abs_hour, $abs_mins );
return $tz_offset;
}
/**
* Retrieves the timezone of the site as a `DateTimeZone` object.
*
* Timezone can be based on a PHP timezone string or a ±HH:MM offset.
*
* @since 5.3.0
*
* @return DateTimeZone Timezone object.
*/
function wp_timezone() {
return new DateTimeZone( wp_timezone_string() );
}
/**
* Retrieves the date in localized format, based on a sum of Unix timestamp and
* timezone offset in seconds.
*
* If the locale specifies the locale month and weekday, then the locale will
* take over the format for the date. If it isn't, then the date format string
* will be used instead.
*
* Note that due to the way WP typically generates a sum of timestamp and offset
* with `strtotime()`, it implies offset added at a _current_ time, not at the time
* the timestamp represents. Storing such timestamps or calculating them differently
* will lead to invalid output.
*
* @since 0.71
* @since 5.3.0 Converted into a wrapper for wp_date().
*
* @param string $format Format to display the date.
* @param int|bool $timestamp_with_offset Optional. A sum of Unix timestamp and timezone offset
* in seconds. Default false.
* @param bool $gmt Optional. Whether to use GMT timezone. Only applies
* if timestamp is not provided. Default false.
* @return string The date, translated if locale specifies it.
*/
function date_i18n( $format, $timestamp_with_offset = false, $gmt = false ) {
$timestamp = $timestamp_with_offset;
// If timestamp is omitted it should be current time (summed with offset, unless `$gmt` is true).
if ( ! is_numeric( $timestamp ) ) {
// phpcs:ignore WordPress.DateTime.CurrentTimeTimestamp.Requested
$timestamp = current_time( 'timestamp', $gmt );
}
/*
* This is a legacy implementation quirk that the returned timestamp is also with offset.
* Ideally this function should never be used to produce a timestamp.
*/
if ( 'U' === $format ) {
$date = $timestamp;
} elseif ( $gmt && false === $timestamp_with_offset ) { // Current time in UTC.
$date = wp_date( $format, null, new DateTimeZone( 'UTC' ) );
} elseif ( false === $timestamp_with_offset ) { // Current time in site's timezone.
$date = wp_date( $format );
} else {
/*
* Timestamp with offset is typically produced by a UTC `strtotime()` call on an input without timezone.
* This is the best attempt to reverse that operation into a local time to use.
*/
$local_time = gmdate( 'Y-m-d H:i:s', $timestamp );
$timezone = wp_timezone();
$datetime = date_create( $local_time, $timezone );
$date = wp_date( $format, $datetime->getTimestamp(), $timezone );
}
/**
* Filters the date formatted based on the locale.
*
* @since 2.8.0
*
* @param string $date Formatted date string.
* @param string $format Format to display the date.
* @param int $timestamp A sum of Unix timestamp and timezone offset in seconds.
* Might be without offset if input omitted timestamp but requested GMT.
* @param bool $gmt Whether to use GMT timezone. Only applies if timestamp was not provided.
*/
$date = apply_filters( 'date_i18n', $date, $format, $timestamp, $gmt );
return $date;
}
/**
* Retrieves the date, in localized format.
*
* This is a newer function, intended to replace `date_i18n()` without legacy quirks in it.
*
* Note that, unlike `date_i18n()`, this function accepts a true Unix timestamp, not summed
* with timezone offset.
*
* @since 5.3.0
*
* @global WP_Locale $wp_locale WordPress date and time locale object.
*
* @param string $format PHP date format.
* @param int|null $timestamp Optional. Unix timestamp. Defaults to current time.
* @param DateTimeZone|null $timezone Optional. Timezone to output result in. Defaults to timezone
* from site settings.
* @return string|false The date, translated if locale specifies it. False on invalid timestamp input.
*/
function wp_date( $format, $timestamp = null, $timezone = null ) {
global $wp_locale;
if ( null === $timestamp ) {
$timestamp = time();
} elseif ( ! is_numeric( $timestamp ) ) {
return false;
}
if ( ! $timezone ) {
$timezone = wp_timezone();
}
$datetime = date_create( '@' . $timestamp );
$datetime->setTimezone( $timezone );
if ( empty( $wp_locale->month ) || empty( $wp_locale->weekday ) ) {
$date = $datetime->format( $format );
} else {
// We need to unpack shorthand `r` format because it has parts that might be localized.
$format = preg_replace( '/(?<!\\\\)r/', DATE_RFC2822, $format );
$new_format = '';
$format_length = strlen( $format );
$month = $wp_locale->get_month( $datetime->format( 'm' ) );
$weekday = $wp_locale->get_weekday( $datetime->format( 'w' ) );
for ( $i = 0; $i < $format_length; $i++ ) {
switch ( $format[ $i ] ) {
case 'D':
$new_format .= addcslashes( $wp_locale->get_weekday_abbrev( $weekday ), '\\A..Za..z' );
break;
case 'F':
$new_format .= addcslashes( $month, '\\A..Za..z' );
break;
case 'l':
$new_format .= addcslashes( $weekday, '\\A..Za..z' );
break;
case 'M':
$new_format .= addcslashes( $wp_locale->get_month_abbrev( $month ), '\\A..Za..z' );
break;
case 'a':
$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'a' ) ), '\\A..Za..z' );
break;
case 'A':
$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'A' ) ), '\\A..Za..z' );
break;
case '\\':
$new_format .= $format[ $i ];
// If character follows a slash, we add it without translating.
if ( $i < $format_length ) {
$new_format .= $format[ ++$i ];
}
break;
default:
$new_format .= $format[ $i ];
break;
}
}
$date = $datetime->format( $new_format );
$date = wp_maybe_decline_date( $date, $format );
}
/**
* Filters the date formatted based on the locale.
*
* @since 5.3.0
*
* @param string $date Formatted date string.
* @param string $format Format to display the date.
* @param int $timestamp Unix timestamp.
* @param DateTimeZone $timezone Timezone.
*/
$date = apply_filters( 'wp_date', $date, $format, $timestamp, $timezone );
return $date;
}
/**
* Determines if the date should be declined.
*
* If the locale specifies that month names require a genitive case in certain
* formats (like 'j F Y'), the month name will be replaced with a correct form.
*
* @since 4.4.0
* @since 5.4.0 The `$format` parameter was added.
*
* @global WP_Locale $wp_locale WordPress date and time locale object.
*
* @param string $date Formatted date string.
* @param string $format Optional. Date format to check. Default empty string.
* @return string The date, declined if locale specifies it.
*/
function wp_maybe_decline_date( $date, $format = '' ) {
global $wp_locale;
// i18n functions are not available in SHORTINIT mode.
if ( ! function_exists( '_x' ) ) {
return $date;
}
/*
* translators: If months in your language require a genitive case,
* translate this to 'on'. Do not translate into your own language.
*/
if ( 'on' === _x( 'off', 'decline months names: on or off' ) ) {
$months = $wp_locale->month;
$months_genitive = $wp_locale->month_genitive;
/*
* Match a format like 'j F Y' or 'j. F' (day of the month, followed by month name)
* and decline the month.
*/
if ( $format ) {
$decline = preg_match( '#[dj]\.? F#', $format );
} else {
// If the format is not passed, try to guess it from the date string.
$decline = preg_match( '#\b\d{1,2}\.? [^\d ]+\b#u', $date );
}
if ( $decline ) {
foreach ( $months as $key => $month ) {
$months[ $key ] = '# ' . preg_quote( $month, '#' ) . '\b#u';
}
foreach ( $months_genitive as $key => $month ) {
$months_genitive[ $key ] = ' ' . $month;
}
$date = preg_replace( $months, $months_genitive, $date );
}
/*
* Match a format like 'F jS' or 'F j' (month name, followed by day with an optional ordinal suffix)
* and change it to declined 'j F'.
*/
if ( $format ) {
$decline = preg_match( '#F [dj]#', $format );
} else {
// If the format is not passed, try to guess it from the date string.
$decline = preg_match( '#\b[^\d ]+ \d{1,2}(st|nd|rd|th)?\b#u', trim( $date ) );
}
if ( $decline ) {
foreach ( $months as $key => $month ) {
$months[ $key ] = '#\b' . preg_quote( $month, '#' ) . ' (\d{1,2})(st|nd|rd|th)?([-–]\d{1,2})?(st|nd|rd|th)?\b#u';
}
foreach ( $months_genitive as $key => $month ) {
$months_genitive[ $key ] = '$1$3 ' . $month;
}
$date = preg_replace( $months, $months_genitive, $date );
}
}
// Used for locale-specific rules.
$locale = get_locale();
if ( 'ca' === $locale ) {
// " de abril| de agost| de octubre..." -> " d'abril| d'agost| d'octubre..."
$date = preg_replace( '# de ([ao])#i', " d'\\1", $date );
}
return $date;
}
/**
* Converts float number to format based on the locale.
*
* @since 2.3.0
*
* @global WP_Locale $wp_locale WordPress date and time locale object.
*
* @param float $number The number to convert based on locale.
* @param int $decimals Optional. Precision of the number of decimal places. Default 0.
* @return string Converted number in string format.
*/
function number_format_i18n( $number, $decimals = 0 ) {
global $wp_locale;
if ( isset( $wp_locale ) ) {
$formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
} else {
$formatted = number_format( $number, absint( $decimals ) );
}
/**
* Filters the number formatted based on the locale.
*
* @since 2.8.0
* @since 4.9.0 The `$number` and `$decimals` parameters were added.
*
* @param string $formatted Converted number in string format.
* @param float $number The number to convert based on locale.
* @param int $decimals Precision of the number of decimal places.
*/
return apply_filters( 'number_format_i18n', $formatted, $number, $decimals );
}
/**
* Converts a number of bytes to the largest unit the bytes will fit into.
*
* It is easier to read 1 KB than 1024 bytes and 1 MB than 1048576 bytes. Converts
* number of bytes to human readable number by taking the number of that unit
* that the bytes will go into it. Supports YB value.
*
* Please note that integers in PHP are limited to 32 bits, unless they are on
* 64 bit architecture, then they have 64 bit size. If you need to place the
* larger size then what PHP integer type will hold, then use a string. It will
* be converted to a double, which should always have 64 bit length.
*
* Technically the correct unit names for powers of 1024 are KiB, MiB etc.
*
* @since 2.3.0
* @since 6.0.0 Support for PB, EB, ZB, and YB was added.
*
* @param int|string $bytes Number of bytes. Note max integer size for integers.
* @param int $decimals Optional. Precision of number of decimal places. Default 0.
* @return string|false Number string on success, false on failure.
*/
function size_format( $bytes, $decimals = 0 ) {
$quant = array(
/* translators: Unit symbol for yottabyte. */
_x( 'YB', 'unit symbol' ) => YB_IN_BYTES,
/* translators: Unit symbol for zettabyte. */
_x( 'ZB', 'unit symbol' ) => ZB_IN_BYTES,
/* translators: Unit symbol for exabyte. */
_x( 'EB', 'unit symbol' ) => EB_IN_BYTES,
/* translators: Unit symbol for petabyte. */
_x( 'PB', 'unit symbol' ) => PB_IN_BYTES,
/* translators: Unit symbol for terabyte. */
_x( 'TB', 'unit symbol' ) => TB_IN_BYTES,
/* translators: Unit symbol for gigabyte. */
_x( 'GB', 'unit symbol' ) => GB_IN_BYTES,
/* translators: Unit symbol for megabyte. */
_x( 'MB', 'unit symbol' ) => MB_IN_BYTES,
/* translators: Unit symbol for kilobyte. */
_x( 'KB', 'unit symbol' ) => KB_IN_BYTES,
/* translators: Unit symbol for byte. */
_x( 'B', 'unit symbol' ) => 1,
);
if ( 0 === $bytes ) {
/* translators: Unit symbol for byte. */
return number_format_i18n( 0, $decimals ) . ' ' . _x( 'B', 'unit symbol' );
}
foreach ( $quant as $unit => $mag ) {
if ( (float) $bytes >= $mag ) {
return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
}
}
return false;
}
/**
* Converts a duration to human readable format.
*
* @since 5.1.0
*
* @param string $duration Duration will be in string format (HH:ii:ss) OR (ii:ss),
* with a possible prepended negative sign (-).
* @return string|false A human readable duration string, false on failure.
*/
function human_readable_duration( $duration = '' ) {
if ( ( empty( $duration ) || ! is_string( $duration ) ) ) {
return false;
}
$duration = trim( $duration );
// Remove prepended negative sign.
if ( str_starts_with( $duration, '-' ) ) {
$duration = substr( $duration, 1 );
}
// Extract duration parts.
$duration_parts = array_reverse( explode( ':', $duration ) );
$duration_count = count( $duration_parts );
$hour = null;
$minute = null;
$second = null;
if ( 3 === $duration_count ) {
// Validate HH:ii:ss duration format.
if ( ! ( (bool) preg_match( '/^([0-9]+):([0-5]?[0-9]):([0-5]?[0-9])$/', $duration ) ) ) {
return false;
}
// Three parts: hours, minutes & seconds.
list( $second, $minute, $hour ) = $duration_parts;
} elseif ( 2 === $duration_count ) {
// Validate ii:ss duration format.
if ( ! ( (bool) preg_match( '/^([0-5]?[0-9]):([0-5]?[0-9])$/', $duration ) ) ) {
return false;
}
// Two parts: minutes & seconds.
list( $second, $minute ) = $duration_parts;
} else {
return false;
}
$human_readable_duration = array();
// Add the hour part to the string.
if ( is_numeric( $hour ) ) {
/* translators: %s: Time duration in hour or hours. */
$human_readable_duration[] = sprintf( _n( '%s hour', '%s hours', $hour ), (int) $hour );
}
// Add the minute part to the string.
if ( is_numeric( $minute ) ) {
/* translators: %s: Time duration in minute or minutes. */
$human_readable_duration[] = sprintf( _n( '%s minute', '%s minutes', $minute ), (int) $minute );
}
// Add the second part to the string.
if ( is_numeric( $second ) ) {
/* translators: %s: Time duration in second or seconds. */
$human_readable_duration[] = sprintf( _n( '%s second', '%s seconds', $second ), (int) $second );
}
return implode( ', ', $human_readable_duration );
}
/**
* Gets the week start and end from the datetime or date string from MySQL.
*
* @since 0.71
*
* @param string $mysqlstring Date or datetime field type from MySQL.
* @param int|string $start_of_week Optional. Start of the week as an integer. Default empty string.
* @return int[] {
* Week start and end dates as Unix timestamps.
*
* @type int $start The week start date as a Unix timestamp.
* @type int $end The week end date as a Unix timestamp.
* }
*/
function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
// MySQL string year.
$mysql_year = substr( $mysqlstring, 0, 4 );
// MySQL string month.
$mysql_month = substr( $mysqlstring, 5, 2 );
// MySQL string day.
$mysql_day = substr( $mysqlstring, 8, 2 );
// The timestamp for MySQL string day.
$day = mktime( 0, 0, 0, $mysql_month, $mysql_day, $mysql_year );
// The day of the week from the timestamp.
$weekday = (int) gmdate( 'w', $day );
if ( ! is_numeric( $start_of_week ) ) {
$start_of_week = (int) get_option( 'start_of_week' );
}
if ( $weekday < $start_of_week ) {
$weekday += 7;
}
// The most recent week start day on or before $day.
$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week );
// $start + 1 week - 1 second.
$end = $start + WEEK_IN_SECONDS - 1;
return compact( 'start', 'end' );
}
/**
* Serializes data, if needed.
*
* @since 2.0.5
*
* @param string|array|object $data Data that might be serialized.
* @return mixed A scalar data.
*/
function maybe_serialize( $data ) {
if ( is_array( $data ) || is_object( $data ) ) {
return serialize( $data );
}
/*
* Double serialization is required for backward compatibility.
* See https://core.trac.wordpress.org/ticket/12930
* Also the world will end. See WP 3.6.1.
*/
if ( is_serialized( $data, false ) ) {
return serialize( $data );
}
return $data;
}
/**
* Unserializes data only if it was serialized.
*
* @since 2.0.0
*
* @param string $data Data that might be unserialized.
* @return mixed Unserialized data can be any type.
*/
function maybe_unserialize( $data ) {
if ( is_serialized( $data ) ) { // Don't attempt to unserialize data that wasn't serialized going in.
return @unserialize( trim( $data ) );
}
return $data;
}
/**
* Checks value to find if it was serialized.
*
* If $data is not a string, then returned value will always be false.
* Serialized data is always a string.
*
* @since 2.0.5
* @since 6.1.0 Added Enum support.
*
* @param string $data Value to check to see if was serialized.
* @param bool $strict Optional. Whether to be strict about the end of the string. Default true.
* @return bool False if not serialized and true if it was.
*/
function is_serialized( $data, $strict = true ) {
// If it isn't a string, it isn't serialized.
if ( ! is_string( $data ) ) {
return false;
}
$data = trim( $data );
if ( 'N;' === $data ) {
return true;
}
if ( strlen( $data ) < 4 ) {
return false;
}
if ( ':' !== $data[1] ) {
return false;
}
if ( $strict ) {
$lastc = substr( $data, -1 );
if ( ';' !== $lastc && '}' !== $lastc ) {
return false;
}
} else {
$semicolon = strpos( $data, ';' );
$brace = strpos( $data, '}' );
// Either ; or } must exist.
if ( false === $semicolon && false === $brace ) {
return false;
}
// But neither must be in the first X characters.
if ( false !== $semicolon && $semicolon < 3 ) {
return false;
}
if ( false !== $brace && $brace < 4 ) {
return false;
}
}
$token = $data[0];
switch ( $token ) {
case 's':
if ( $strict ) {
if ( '"' !== substr( $data, -2, 1 ) ) {
return false;
}
} elseif ( ! str_contains( $data, '"' ) ) {
return false;
}
// Or else fall through.
case 'a':
case 'O':
case 'E':
return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
case 'b':
case 'i':
case 'd':
$end = $strict ? '$' : '';
return (bool) preg_match( "/^{$token}:[0-9.E+-]+;$end/", $data );
}
return false;
}
/**
* Checks whether serialized data is of string type.
*
* @since 2.0.5
*
* @param string $data Serialized data.
* @return bool False if not a serialized string, true if it is.
*/
function is_serialized_string( $data ) {
// if it isn't a string, it isn't a serialized string.
if ( ! is_string( $data ) ) {
return false;
}
$data = trim( $data );
if ( strlen( $data ) < 4 ) {
return false;
} elseif ( ':' !== $data[1] ) {
return false;
} elseif ( ! str_ends_with( $data, ';' ) ) {
return false;
} elseif ( 's' !== $data[0] ) {
return false;
} elseif ( '"' !== substr( $data, -2, 1 ) ) {
return false;
} else {
return true;
}
}
/**
* Retrieves post title from XML-RPC XML.
*
* If the `title` element is not found in the XML, the default post title
* from the `$post_default_title` global will be used instead.
*
* @since 0.71
*
* @global string $post_default_title Default XML-RPC post title.
*
* @param string $content XML-RPC XML Request content.
* @return string Post title.
*/
function xmlrpc_getposttitle( $content ) {
global $post_default_title;
if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {
$post_title = $matchtitle[1];
} else {
$post_title = $post_default_title;
}
return $post_title;
}
/**
* Retrieves the post category or categories from XML-RPC XML.
*
* If the `category` element is not found in the XML, the default post category
* from the `$post_default_category` global will be used instead.
* The return type will then be a string.
*
* If the `category` element is found, the return type will be an array.
*
* @since 0.71
*
* @global string $post_default_category Default XML-RPC post category.
*
* @param string $content XML-RPC XML Request content.
* @return string[]|string An array of category names or default category name.
*/
function xmlrpc_getpostcategory( $content ) {
global $post_default_category;
if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {
$post_category = trim( $matchcat[1], ',' );
$post_category = explode( ',', $post_category );
} else {
$post_category = $post_default_category;
}
return $post_category;
}
/**
* XML-RPC XML content without title and category elements.
*
* @since 0.71
*
* @param string $content XML-RPC XML Request content.
* @return string XML-RPC XML Request content without title and category elements.
*/
function xmlrpc_removepostdata( $content ) {
$content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );
$content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );
$content = trim( $content );
return $content;
}
/**
* Uses RegEx to extract URLs from arbitrary content.
*
* @since 3.7.0
* @since 6.0.0 Fixes support for HTML entities (Trac 30580).
*
* @param string $content Content to extract URLs from.
* @return string[] Array of URLs found in passed string.
*/
function wp_extract_urls( $content ) {
preg_match_all(
"#([\"']?)("
. '(?:([\w-]+:)?//?)'
. '[^\s()<>]+'
. '[.]'
. '(?:'
. '\([\w\d]+\)|'
. '(?:'
. "[^`!()\[\]{}:'\".,<>«»“”‘’\s]|"
. '(?:[:]\d+)?/?'
. ')+'
. ')'
. ")\\1#",
$content,
$post_links
);
$post_links = array_unique(
array_map(
static function ( $link ) {
// Decode to replace valid entities, like &.
$link = html_entity_decode( $link );
// Maintain backward compatibility by removing extraneous semi-colons (`;`).
return str_replace( ';', '', $link );
},
$post_links[2]
)
);
return array_values( $post_links );
}
/**
* Checks content for video and audio links to add as enclosures.
*
* Will not add enclosures that have already been added and will
* remove enclosures that are no longer in the post. This is called as
* pingbacks and trackbacks.
*
* @since 1.5.0
* @since 5.3.0 The `$content` parameter was made optional, and the `$post` parameter was
* updated to accept a post ID or a WP_Post object.
* @since 5.6.0 The `$content` parameter is no longer optional, but passing `null` to skip it
* is still supported.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string|null $content Post content. If `null`, the `post_content` field from `$post` is used.
* @param int|WP_Post $post Post ID or post object.
* @return void|false Void on success, false if the post is not found.
*/
function do_enclose( $content, $post ) {
global $wpdb;
// @todo Tidy this code and make the debug code optional.
require_once ABSPATH . WPINC . '/class-IXR.php';
$post = get_post( $post );
if ( ! $post ) {
return false;
}
if ( null === $content ) {
$content = $post->post_content;
}
$post_links = array();
$pung = get_enclosed( $post->ID );
$post_links_temp = wp_extract_urls( $content );
foreach ( $pung as $link_test ) {
// Link is no longer in post.
if ( ! in_array( $link_test, $post_links_temp, true ) ) {
$mids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post->ID, $wpdb->esc_like( $link_test ) . '%' ) );
foreach ( $mids as $mid ) {
delete_metadata_by_mid( 'post', $mid );
}
}
}
foreach ( (array) $post_links_temp as $link_test ) {
// If we haven't pung it already.
if ( ! in_array( $link_test, $pung, true ) ) {
$test = parse_url( $link_test );
if ( false === $test ) {
continue;
}
if ( isset( $test['query'] ) ) {
$post_links[] = $link_test;
} elseif ( isset( $test['path'] ) && ( '/' !== $test['path'] ) && ( '' !== $test['path'] ) ) {
$post_links[] = $link_test;
}
}
}
/**
* Filters the list of enclosure links before querying the database.
*
* Allows for the addition and/or removal of potential enclosures to save
* to postmeta before checking the database for existing enclosures.
*
* @since 4.4.0
*
* @param string[] $post_links An array of enclosure links.
* @param int $post_id Post ID.
*/
$post_links = apply_filters( 'enclosure_links', $post_links, $post->ID );
foreach ( (array) $post_links as $url ) {
$url = strip_fragment_from_url( $url );
if ( '' !== $url && ! $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post->ID, $wpdb->esc_like( $url ) . '%' ) ) ) {
$headers = wp_get_http_headers( $url );
if ( $headers ) {
$len = (int) ( $headers['Content-Length'] ?? 0 );
$type = $headers['Content-Type'] ?? '';
$allowed_types = array( 'video', 'audio' );
// Check to see if we can figure out the mime type from the extension.
$url_parts = parse_url( $url );
if ( false !== $url_parts && ! empty( $url_parts['path'] ) ) {
$extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );
if ( ! empty( $extension ) ) {
foreach ( wp_get_mime_types() as $exts => $mime ) {
if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {
$type = $mime;
break;
}
}
}
}
if ( in_array( substr( $type, 0, strpos( $type, '/' ) ), $allowed_types, true ) ) {
add_post_meta( $post->ID, 'enclosure', "$url\n$len\n$mime\n" );
}
}
}
}
}
/**
* Retrieves HTTP Headers from URL.
*
* @since 1.5.1
*
* @param string $url URL to retrieve HTTP headers from.
* @param bool $deprecated Not Used.
* @return \WpOrg\Requests\Utility\CaseInsensitiveDictionary|false Headers on success, false on failure.
*/
function wp_get_http_headers( $url, $deprecated = false ) {
if ( ! empty( $deprecated ) ) {
_deprecated_argument( __FUNCTION__, '2.7.0' );
}
$response = wp_safe_remote_head( $url );
if ( is_wp_error( $response ) ) {
return false;
}
return wp_remote_retrieve_headers( $response );