FM / wp-includes

/var/www/p4ela.net/www/wp-includes

Name	Size	Mode	Actions
assets/	-	0777	rm
block-bindings/	-	0777	rm
block-patterns/	-	0777	rm
block-supports/	-	0777	rm
blocks/	-	0777	rm
certificates/	-	0777	rm
css/	-	0777	rm
customize/	-	0777	rm
fonts/	-	0777	rm
html-api/	-	0777	rm
ID3/	-	0777	rm
images/	-	0777	rm
interactivity-api/	-	0777	rm
IXR/	-	0777	rm
js/	-	0777	rm
l10n/	-	0777	rm
php-compat/	-	0777	rm
PHPMailer/	-	0777	rm
pomo/	-	0777	rm
Requests/	-	0777	rm
rest-api/	-	0777	rm
SimplePie/	-	0777	rm
sitemaps/	-	0777	rm
sodium_compat/	-	0777	rm
style-engine/	-	0777	rm
Text/	-	0777	rm
theme-compat/	-	0777	rm
widgets/	-	0777	rm
admin-bar.php	37100	0666	edit dl rm
atomlib.php	12078	0666	edit dl rm
author-template.php	18951	0666	edit dl rm
block-bindings.php	5594	0666	edit dl rm
block-editor.php	28340	0666	edit dl rm
block-i18n.json	316	0666	edit dl rm
block-patterns.php	13119	0666	edit dl rm
block-template-utils.php	60145	0666	edit dl rm
block-template.php	14142	0666	edit dl rm
blocks.php	104889	0666	edit dl rm
bookmark-template.php	12948	0666	edit dl rm
bookmark.php	15427	0666	edit dl rm
cache-compat.php	5969	0666	edit dl rm
cache.php	13474	0666	edit dl rm
canonical.php	34506	0666	edit dl rm
capabilities.php	42718	0666	edit dl rm
category-template.php	57003	0666	edit dl rm
category.php	12709	0666	edit dl rm
class-avif-info.php	29615	0666	edit dl rm
class-feed.php	539	0666	edit dl rm
class-http.php	367	0666	edit dl rm
class-IXR.php	2543	0666	edit dl rm
class-json.php	43684	0666	edit dl rm
class-oembed.php	401	0666	edit dl rm
class-phpass.php	6771	0666	edit dl rm
class-phpmailer.php	664	0666	edit dl rm
class-pop3.php	21174	0666	edit dl rm
class-requests.php	2237	0666	edit dl rm
class-simplepie.php	453	0666	edit dl rm
class-smtp.php	457	0666	edit dl rm
class-snoopy.php	37715	0666	edit dl rm
class-walker-category-dropdown.php	2469	0666	edit dl rm
class-walker-category.php	8477	0666	edit dl rm
class-walker-comment.php	14221	0666	edit dl rm
class-walker-nav-menu.php	11784	0666	edit dl rm
class-walker-page-dropdown.php	2710	0666	edit dl rm
class-walker-page.php	7612	0666	edit dl rm
class-wp-admin-bar.php	17874	0666	edit dl rm
class-wp-ajax-response.php	5266	0666	edit dl rm
class-wp-application-passwords.php	15617	0666	edit dl rm
class-wp-block-bindings-registry.php	8463	0666	edit dl rm
class-wp-block-bindings-source.php	2992	0666	edit dl rm
class-wp-block-editor-context.php	1350	0666	edit dl rm
class-wp-block-list.php	4757	0666	edit dl rm
class-wp-block-metadata-registry.php	10227	0666	edit dl rm
class-wp-block-parser-block.php	2555	0666	edit dl rm
class-wp-block-parser-frame.php	2017	0666	edit dl rm
class-wp-block-parser.php	11532	0666	edit dl rm
class-wp-block-pattern-categories-registry.php	5371	0666	edit dl rm
class-wp-block-patterns-registry.php	11185	0666	edit dl rm
class-wp-block-styles-registry.php	6262	0666	edit dl rm
class-wp-block-supports.php	5612	0666	edit dl rm
class-wp-block-template.php	2033	0666	edit dl rm
class-wp-block-templates-registry.php	7231	0666	edit dl rm
class-wp-block-type-registry.php	5013	0666	edit dl rm
class-wp-block-type.php	17265	0666	edit dl rm
class-wp-block.php	20438	0666	edit dl rm
class-wp-classic-to-block-menu-converter.php	4088	0666	edit dl rm
class-wp-comment-query.php	48395	0666	edit dl rm
class-wp-comment.php	9372	0666	edit dl rm
class-wp-customize-control.php	25730	0666	edit dl rm
class-wp-customize-manager.php	202539	0666	edit dl rm
class-wp-customize-nav-menus.php	57433	0666	edit dl rm
class-wp-customize-panel.php	10637	0666	edit dl rm
class-wp-customize-section.php	11209	0666	edit dl rm
class-wp-customize-setting.php	29889	0666	edit dl rm
class-wp-customize-widgets.php	72157	0666	edit dl rm
class-wp-date-query.php	35726	0666	edit dl rm
class-wp-dependencies.php	15139	0666	edit dl rm
class-wp-dependency.php	2627	0666	edit dl rm
class-wp-duotone.php	40783	0666	edit dl rm
class-wp-editor.php	72335	0666	edit dl rm
class-wp-embed.php	15994	0666	edit dl rm
class-wp-error.php	7502	0666	edit dl rm
class-wp-exception.php	253	0666	edit dl rm
class-wp-fatal-error-handler.php	8150	0666	edit dl rm
class-wp-feed-cache-transient.php	3176	0666	edit dl rm
class-wp-feed-cache.php	969	0666	edit dl rm
class-wp-hook.php	16000	0666	edit dl rm
class-wp-http-cookie.php	7389	0666	edit dl rm
class-wp-http-curl.php	12541	0666	edit dl rm
class-wp-http-encoding.php	6689	0666	edit dl rm
class-wp-http-ixr-client.php	3506	0666	edit dl rm
class-wp-http-proxy.php	5980	0666	edit dl rm
class-wp-http-requests-hooks.php	2022	0666	edit dl rm
class-wp-http-requests-response.php	4400	0666	edit dl rm
class-wp-http-response.php	2977	0666	edit dl rm
class-wp-http-streams.php	16859	0666	edit dl rm
class-wp-http.php	41506	0666	edit dl rm
class-wp-image-editor-gd.php	19886	0666	edit dl rm
class-wp-image-editor-imagick.php	39106	0666	edit dl rm
class-wp-image-editor.php	16938	0666	edit dl rm
class-wp-list-util.php	7443	0666	edit dl rm
class-wp-locale-switcher.php	6630	0666	edit dl rm
class-wp-locale.php	16111	0666	edit dl rm
class-wp-matchesmapregex.php	1828	0666	edit dl rm
class-wp-meta-query.php	30531	0666	edit dl rm
class-wp-metadata-lazyloader.php	6833	0666	edit dl rm
class-wp-navigation-fallback.php	9211	0666	edit dl rm
class-wp-network-query.php	19857	0666	edit dl rm
class-wp-network.php	12296	0666	edit dl rm
class-wp-object-cache.php	17524	0666	edit dl rm
class-wp-oembed-controller.php	6905	0666	edit dl rm
class-wp-oembed.php	31475	0666	edit dl rm
class-wp-paused-extensions-storage.php	5111	0666	edit dl rm
class-wp-plugin-dependencies.php	25319	0666	edit dl rm
class-wp-post-type.php	30340	0666	edit dl rm
class-wp-post.php	6484	0666	edit dl rm
class-wp-query.php	154081	0666	edit dl rm
class-wp-recovery-mode-cookie-service.php	6877	0666	edit dl rm
class-wp-recovery-mode-email-service.php	11183	0666	edit dl rm
class-wp-recovery-mode-key-service.php	4608	0666	edit dl rm
class-wp-recovery-mode-link-service.php	3463	0666	edit dl rm
class-wp-recovery-mode.php	11435	0666	edit dl rm
class-wp-rewrite.php	63688	0666	edit dl rm
class-wp-role.php	2523	0666	edit dl rm
class-wp-roles.php	8586	0666	edit dl rm
class-wp-script-modules.php	19366	0666	edit dl rm
class-wp-scripts.php	28344	0666	edit dl rm
class-wp-session-tokens.php	7451	0666	edit dl rm
class-wp-simplepie-file.php	3408	0666	edit dl rm
class-wp-simplepie-sanitize-kses.php	1837	0666	edit dl rm
class-wp-site-query.php	31625	0666	edit dl rm
class-wp-site.php	7454	0666	edit dl rm
class-wp-styles.php	11010	0666	edit dl rm
class-wp-tax-query.php	19555	0666	edit dl rm
class-wp-taxonomy.php	18567	0666	edit dl rm
class-wp-term-query.php	40869	0666	edit dl rm
class-wp-term.php	5298	0666	edit dl rm
class-wp-text-diff-renderer-inline.php	979	0666	edit dl rm
class-wp-text-diff-renderer-table.php	18807	0666	edit dl rm
class-wp-textdomain-registry.php	10481	0666	edit dl rm
class-wp-theme-json-data.php	1809	0666	edit dl rm
class-wp-theme-json-resolver.php	35805	0666	edit dl rm
class-wp-theme-json-schema.php	7367	0666	edit dl rm
class-wp-theme-json.php	160780	0666	edit dl rm
class-wp-theme.php	65413	0666	edit dl rm
class-wp-token-map.php	28618	0666	edit dl rm
class-wp-user-meta-session-tokens.php	2990	0666	edit dl rm
class-wp-user-query.php	43654	0666	edit dl rm
class-wp-user-request.php	2222	0666	edit dl rm
class-wp-user.php	22827	0666	edit dl rm
class-wp-walker.php	13322	0666	edit dl rm
class-wp-widget-factory.php	3347	0666	edit dl rm
class-wp-widget.php	18424	0666	edit dl rm
class-wp-xmlrpc-server.php	214948	0666	edit dl rm
class-wp.php	26119	0666	edit dl rm
class-wpdb.php	118389	0666	edit dl rm
class.wp-dependencies.php	373	0666	edit dl rm
class.wp-scripts.php	343	0666	edit dl rm
class.wp-styles.php	338	0666	edit dl rm
comment-template.php	102773	0666	edit dl rm
comment.php	130275	0666	edit dl rm
compat.php	16974	0666	edit dl rm
cron.php	41594	0666	edit dl rm
date.php	400	0666	edit dl rm
default-constants.php	11365	0666	edit dl rm
default-filters.php	35685	0666	edit dl rm
default-widgets.php	2222	0666	edit dl rm
deprecated.php	190130	0666	edit dl rm
embed-template.php	338	0666	edit dl rm
embed.php	37908	0666	edit dl rm
error-protection.php	4121	0666	edit dl rm
feed-atom-comments.php	5504	0666	edit dl rm
feed-atom.php	3048	0666	edit dl rm
feed-rdf.php	2668	0666	edit dl rm
feed-rss.php	1189	0666	edit dl rm
feed-rss2-comments.php	4136	0666	edit dl rm
feed-rss2.php	3799	0666	edit dl rm
feed.php	23411	0666	edit dl rm
fonts.php	9751	0666	edit dl rm
formatting.php	335229	0666	edit dl rm
functions.php	283163	0666	edit dl rm
functions.wp-scripts.php	14558	0666	edit dl rm
functions.wp-styles.php	8583	0666	edit dl rm
general-template.php	169492	0666	edit dl rm
global-styles-and-settings.php	21205	0666	edit dl rm
http.php	27084	0666	edit dl rm
https-detection.php	5661	0666	edit dl rm
https-migration.php	4741	0666	edit dl rm
kses.php	74575	0666	edit dl rm
l10n.php	68415	0666	edit dl rm
link-template.php	157710	0666	edit dl rm
load.php	55658	0666	edit dl rm
locale.php	162	0666	edit dl rm
media-template.php	63043	0666	edit dl rm
media.php	218485	0666	edit dl rm
meta.php	64409	0666	edit dl rm
ms-blogs.php	25772	0666	edit dl rm
ms-default-constants.php	4921	0666	edit dl rm
ms-default-filters.php	6636	0666	edit dl rm
ms-deprecated.php	21759	0666	edit dl rm
ms-files.php	2711	0666	edit dl rm
ms-functions.php	91249	0666	edit dl rm
ms-load.php	19883	0666	edit dl rm
ms-network.php	3782	0666	edit dl rm
ms-settings.php	4124	0666	edit dl rm
ms-site.php	40490	0666	edit dl rm
nav-menu-template.php	25917	0666	edit dl rm
nav-menu.php	44347	0666	edit dl rm
option.php	101759	0666	edit dl rm
pluggable-deprecated.php	6263	0666	edit dl rm
pluggable.php	115970	0666	edit dl rm
plugin.php	35465	0666	edit dl rm
post-formats.php	7102	0666	edit dl rm
post-template.php	66880	0666	edit dl rm
post-thumbnail-template.php	10826	0666	edit dl rm
post.php	289894	0666	edit dl rm
query.php	37035	0666	edit dl rm
registration-functions.php	200	0666	edit dl rm
registration.php	200	0666	edit dl rm
rest-api.php	99593	0666	edit dl rm
revision.php	30890	0666	edit dl rm
rewrite.php	19541	0666	edit dl rm
robots-template.php	5185	0666	edit dl rm
rss-functions.php	255	0666	edit dl rm
rss.php	23113	0666	edit dl rm
script-loader.php	130735	0666	edit dl rm
script-modules.php	7712	0666	edit dl rm
session.php	258	0666	edit dl rm
shortcodes.php	24051	0666	edit dl rm
sitemaps.php	3238	0666	edit dl rm
spl-autoload-compat.php	441	0666	edit dl rm
style-engine.php	7563	0666	edit dl rm
taxonomy.php	175438	0666	edit dl rm
template-canvas.php	544	0666	edit dl rm
template-loader.php	3350	0666	edit dl rm
template.php	24154	0666	edit dl rm
theme-i18n.json	1292	0666	edit dl rm
theme-previews.php	2832	0666	edit dl rm
theme-templates.php	6223	0666	edit dl rm
theme.json	8704	0666	edit dl rm
theme.php	133985	0666	edit dl rm
update.php	36788	0666	edit dl rm
user.php	175058	0666	edit dl rm
vars.php	6489	0666	edit dl rm
version.php	931	0666	edit dl rm
widgets.php	70682	0666	edit dl rm
wp-db.php	445	0666	edit dl rm
wp-diff.php	726	0666	edit dl rm

Edit: /var/www/p4ela.net/www/wp-includes/compat.php (16974B)

<?php
/**
 * WordPress implementation for PHP functions either missing from older PHP versions or not included by default.
 *
 * This file is loaded extremely early and the functions can be relied upon by drop-ins.
 * Ergo, please ensure you do not rely on external functions when writing code for this file.
 * Only use functions built into PHP or are defined in this file and have adequate testing
 * and error suppression to ensure the file will run correctly and not break websites.
 *
 * @package PHP
 * @access private
 */

// If gettext isn't available.
if ( ! function_exists( '_' ) ) {
	function _( $message ) {
		return $message;
	}
}

/**
 * Returns whether PCRE/u (PCRE_UTF8 modifier) is available for use.
 *
 * @ignore
 * @since 4.2.2
 * @access private
 *
 * @param bool $set - Used for testing only
 *             null   : default - get PCRE/u capability
 *             false  : Used for testing - return false for future calls to this function
 *             'reset': Used for testing - restore default behavior of this function
 */
function _wp_can_use_pcre_u( $set = null ) {
	static $utf8_pcre = 'reset';

if ( null !== $set ) {
		$utf8_pcre = $set;
	}

if ( 'reset' === $utf8_pcre ) {
		// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- intentional error generated to detect PCRE/u support.
		$utf8_pcre = @preg_match( '/^./u', 'a' );
	}

return $utf8_pcre;
}

/**
 * Indicates if a given slug for a character set represents the UTF-8 text encoding.
 *
 * A charset is considered to represent UTF-8 if it is a case-insensitive match
 * of "UTF-8" with or without the hyphen.
 *
 * Example:
 *
 *     true  === _is_utf8_charset( 'UTF-8' );
 *     true  === _is_utf8_charset( 'utf8' );
 *     false === _is_utf8_charset( 'latin1' );
 *     false === _is_utf8_charset( 'UTF 8' );
 *
 *     // Only strings match.
 *     false === _is_utf8_charset( [ 'charset' => 'utf-8' ] );
 *
 * `is_utf8_charset` should be used outside of this file.
 *
 * @ignore
 * @since 6.6.1
 *
 * @param string $charset_slug Slug representing a text character encoding, or "charset".
 *                             E.g. "UTF-8", "Windows-1252", "ISO-8859-1", "SJIS".
 *
 * @return bool Whether the slug represents the UTF-8 encoding.
 */
function _is_utf8_charset( $charset_slug ) {
	if ( ! is_string( $charset_slug ) ) {
		return false;
	}

return (
		0 === strcasecmp( 'UTF-8', $charset_slug ) ||
		0 === strcasecmp( 'UTF8', $charset_slug )
	);
}

if ( ! function_exists( 'mb_substr' ) ) :
	/**
	 * Compat function to mimic mb_substr().
	 *
	 * @ignore
	 * @since 3.2.0
	 *
	 * @see _mb_substr()
	 *
	 * @param string      $string   The string to extract the substring from.
	 * @param int         $start    Position to being extraction from in `$string`.
	 * @param int|null    $length   Optional. Maximum number of characters to extract from `$string`.
	 *                              Default null.
	 * @param string|null $encoding Optional. Character encoding to use. Default null.
	 * @return string Extracted substring.
	 */
	function mb_substr( $string, $start, $length = null, $encoding = null ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.stringFound
		return _mb_substr( $string, $start, $length, $encoding );
	}
endif;

/**
 * Internal compat function to mimic mb_substr().
 *
 * Only understands UTF-8 and 8bit. All other character sets will be treated as 8bit.
 * For `$encoding === UTF-8`, the `$str` input is expected to be a valid UTF-8 byte
 * sequence. The behavior of this function for invalid inputs is undefined.
 *
 * @ignore
 * @since 3.2.0
 *
 * @param string      $str      The string to extract the substring from.
 * @param int         $start    Position to being extraction from in `$str`.
 * @param int|null    $length   Optional. Maximum number of characters to extract from `$str`.
 *                              Default null.
 * @param string|null $encoding Optional. Character encoding to use. Default null.
 * @return string Extracted substring.
 */
function _mb_substr( $str, $start, $length = null, $encoding = null ) {
	if ( null === $str ) {
		return '';
	}

if ( null === $encoding ) {
		$encoding = get_option( 'blog_charset' );
	}

/*
	 * The solution below works only for UTF-8, so in case of a different
	 * charset just use built-in substr().
	 */
	if ( ! _is_utf8_charset( $encoding ) ) {
		return is_null( $length ) ? substr( $str, $start ) : substr( $str, $start, $length );
	}

if ( _wp_can_use_pcre_u() ) {
		// Use the regex unicode support to separate the UTF-8 characters into an array.
		preg_match_all( '/./us', $str, $match );
		$chars = is_null( $length ) ? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
		return implode( '', $chars );
	}

$regex = '/(
		[\x00-\x7F]                  # single-byte sequences   0xxxxxxx
		| [\xC2-\xDF][\x80-\xBF]       # double-byte sequences   110xxxxx 10xxxxxx
		| \xE0[\xA0-\xBF][\x80-\xBF]   # triple-byte sequences   1110xxxx 10xxxxxx * 2
		| [\xE1-\xEC][\x80-\xBF]{2}
		| \xED[\x80-\x9F][\x80-\xBF]
		| [\xEE-\xEF][\x80-\xBF]{2}
		| \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
		| [\xF1-\xF3][\x80-\xBF]{3}
		| \xF4[\x80-\x8F][\x80-\xBF]{2}
	)/x';

// Start with 1 element instead of 0 since the first thing we do is pop.
	$chars = array( '' );

do {
		// We had some string left over from the last round, but we counted it in that last round.
		array_pop( $chars );

/*
		 * Split by UTF-8 character, limit to 1000 characters (last array element will contain
		 * the rest of the string).
		 */
		$pieces = preg_split( $regex, $str, 1000, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );

$chars = array_merge( $chars, $pieces );

// If there's anything left over, repeat the loop.
	} while ( count( $pieces ) > 1 && $str = array_pop( $pieces ) );

return implode( '', array_slice( $chars, $start, $length ) );
}

if ( ! function_exists( 'mb_strlen' ) ) :
	/**
	 * Compat function to mimic mb_strlen().
	 *
	 * @ignore
	 * @since 4.2.0
	 *
	 * @see _mb_strlen()
	 *
	 * @param string      $string   The string to retrieve the character length from.
	 * @param string|null $encoding Optional. Character encoding to use. Default null.
	 * @return int String length of `$string`.
	 */
	function mb_strlen( $string, $encoding = null ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.stringFound
		return _mb_strlen( $string, $encoding );
	}
endif;

/**
 * Internal compat function to mimic mb_strlen().
 *
 * Only understands UTF-8 and 8bit. All other character sets will be treated as 8bit.
 * For `$encoding === UTF-8`, the `$str` input is expected to be a valid UTF-8 byte
 * sequence. The behavior of this function for invalid inputs is undefined.
 *
 * @ignore
 * @since 4.2.0
 *
 * @param string      $str      The string to retrieve the character length from.
 * @param string|null $encoding Optional. Character encoding to use. Default null.
 * @return int String length of `$str`.
 */
function _mb_strlen( $str, $encoding = null ) {
	if ( null === $encoding ) {
		$encoding = get_option( 'blog_charset' );
	}

/*
	 * The solution below works only for UTF-8, so in case of a different charset
	 * just use built-in strlen().
	 */
	if ( ! _is_utf8_charset( $encoding ) ) {
		return strlen( $str );
	}

if ( _wp_can_use_pcre_u() ) {
		// Use the regex unicode support to separate the UTF-8 characters into an array.
		preg_match_all( '/./us', $str, $match );
		return count( $match[0] );
	}

$regex = '/(?:
		[\x00-\x7F]                  # single-byte sequences   0xxxxxxx
		| [\xC2-\xDF][\x80-\xBF]       # double-byte sequences   110xxxxx 10xxxxxx
		| \xE0[\xA0-\xBF][\x80-\xBF]   # triple-byte sequences   1110xxxx 10xxxxxx * 2
		| [\xE1-\xEC][\x80-\xBF]{2}
		| \xED[\x80-\x9F][\x80-\xBF]
		| [\xEE-\xEF][\x80-\xBF]{2}
		| \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
		| [\xF1-\xF3][\x80-\xBF]{3}
		| \xF4[\x80-\x8F][\x80-\xBF]{2}
	)/x';

// Start at 1 instead of 0 since the first thing we do is decrement.
	$count = 1;

do {
		// We had some string left over from the last round, but we counted it in that last round.
		--$count;

/*
		 * Split by UTF-8 character, limit to 1000 characters (last array element will contain
		 * the rest of the string).
		 */
		$pieces = preg_split( $regex, $str, 1000 );

// Increment.
		$count += count( $pieces );

// If there's anything left over, repeat the loop.
	} while ( $str = array_pop( $pieces ) );

// Fencepost: preg_split() always returns one extra item in the array.
	return --$count;
}

if ( ! function_exists( 'hash_hmac' ) ) :
	/**
	 * Compat function to mimic hash_hmac().
	 *
	 * The Hash extension is bundled with PHP by default since PHP 5.1.2.
	 * However, the extension may be explicitly disabled on select servers.
	 * As of PHP 7.4.0, the Hash extension is a core PHP extension and can no
	 * longer be disabled.
	 * I.e. when PHP 7.4.0 becomes the minimum requirement, this polyfill
	 * and the associated `_hash_hmac()` function can be safely removed.
	 *
	 * @ignore
	 * @since 3.2.0
	 *
	 * @see _hash_hmac()
	 *
	 * @param string $algo   Hash algorithm. Accepts 'md5' or 'sha1'.
	 * @param string $data   Data to be hashed.
	 * @param string $key    Secret key to use for generating the hash.
	 * @param bool   $binary Optional. Whether to output raw binary data (true),
	 *                       or lowercase hexits (false). Default false.
	 * @return string|false The hash in output determined by `$binary`.
	 *                      False if `$algo` is unknown or invalid.
	 */
	function hash_hmac( $algo, $data, $key, $binary = false ) {
		return _hash_hmac( $algo, $data, $key, $binary );
	}
endif;

/**
 * Internal compat function to mimic hash_hmac().
 *
 * @ignore
 * @since 3.2.0
 *
 * @param string $algo   Hash algorithm. Accepts 'md5' or 'sha1'.
 * @param string $data   Data to be hashed.
 * @param string $key    Secret key to use for generating the hash.
 * @param bool   $binary Optional. Whether to output raw binary data (true),
 *                       or lowercase hexits (false). Default false.
 * @return string|false The hash in output determined by `$binary`.
 *                      False if `$algo` is unknown or invalid.
 */
function _hash_hmac( $algo, $data, $key, $binary = false ) {
	$packs = array(
		'md5'  => 'H32',
		'sha1' => 'H40',
	);

if ( ! isset( $packs[ $algo ] ) ) {
		return false;
	}

$pack = $packs[ $algo ];

if ( strlen( $key ) > 64 ) {
		$key = pack( $pack, $algo( $key ) );
	}

$key = str_pad( $key, 64, chr( 0 ) );

$ipad = ( substr( $key, 0, 64 ) ^ str_repeat( chr( 0x36 ), 64 ) );
	$opad = ( substr( $key, 0, 64 ) ^ str_repeat( chr( 0x5C ), 64 ) );

$hmac = $algo( $opad . pack( $pack, $algo( $ipad . $data ) ) );

if ( $binary ) {
		return pack( $pack, $hmac );
	}

return $hmac;
}

if ( ! function_exists( 'hash_equals' ) ) :
	/**
	 * Timing attack safe string comparison.
	 *
	 * Compares two strings using the same time whether they're equal or not.
	 *
	 * Note: It can leak the length of a string when arguments of differing length are supplied.
	 *
	 * This function was added in PHP 5.6.
	 * However, the Hash extension may be explicitly disabled on select servers.
	 * As of PHP 7.4.0, the Hash extension is a core PHP extension and can no
	 * longer be disabled.
	 * I.e. when PHP 7.4.0 becomes the minimum requirement, this polyfill
	 * can be safely removed.
	 *
	 * @since 3.9.2
	 *
	 * @param string $known_string Expected string.
	 * @param string $user_string  Actual, user supplied, string.
	 * @return bool Whether strings are equal.
	 */
	function hash_equals( $known_string, $user_string ) {
		$known_string_length = strlen( $known_string );

if ( strlen( $user_string ) !== $known_string_length ) {
			return false;
		}

$result = 0;

// Do not attempt to "optimize" this.
		for ( $i = 0; $i < $known_string_length; $i++ ) {
			$result |= ord( $known_string[ $i ] ) ^ ord( $user_string[ $i ] );
		}

return 0 === $result;
	}
endif;

// sodium_crypto_box() was introduced in PHP 7.2.
if ( ! function_exists( 'sodium_crypto_box' ) ) {
	require ABSPATH . WPINC . '/sodium_compat/autoload.php';
}

if ( ! function_exists( 'is_countable' ) ) {
	/**
	 * Polyfill for is_countable() function added in PHP 7.3.
	 *
	 * Verify that the content of a variable is an array or an object
	 * implementing the Countable interface.
	 *
	 * @since 4.9.6
	 *
	 * @param mixed $value The value to check.
	 * @return bool True if `$value` is countable, false otherwise.
	 */
	function is_countable( $value ) {
		return ( is_array( $value )
			|| $value instanceof Countable
			|| $value instanceof SimpleXMLElement
			|| $value instanceof ResourceBundle
		);
	}
}

if ( ! function_exists( 'array_key_first' ) ) {
	/**
	 * Polyfill for array_key_first() function added in PHP 7.3.
	 *
	 * Get the first key of the given array without affecting
	 * the internal array pointer.
	 *
	 * @since 5.9.0
	 *
	 * @param array $array An array.
	 * @return string|int|null The first key of array if the array
	 *                         is not empty; `null` otherwise.
	 */
	function array_key_first( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		foreach ( $array as $key => $value ) {
			return $key;
		}
	}
}

if ( ! function_exists( 'array_key_last' ) ) {
	/**
	 * Polyfill for `array_key_last()` function added in PHP 7.3.
	 *
	 * Get the last key of the given array without affecting the
	 * internal array pointer.
	 *
	 * @since 5.9.0
	 *
	 * @param array $array An array.
	 * @return string|int|null The last key of array if the array
	 *.                        is not empty; `null` otherwise.
	 */
	function array_key_last( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		if ( empty( $array ) ) {
			return null;
		}

end( $array );

return key( $array );
	}
}

if ( ! function_exists( 'array_is_list' ) ) {
	/**
	 * Polyfill for `array_is_list()` function added in PHP 8.1.
	 *
	 * Determines if the given array is a list.
	 *
	 * An array is considered a list if its keys consist of consecutive numbers from 0 to count($array)-1.
	 *
	 * @see https://github.com/symfony/polyfill-php81/tree/main
	 *
	 * @since 6.5.0
	 *
	 * @param array<mixed> $arr The array being evaluated.
	 * @return bool True if array is a list, false otherwise.
	 */
	function array_is_list( $arr ) {
		if ( ( array() === $arr ) || ( array_values( $arr ) === $arr ) ) {
			return true;
		}

$next_key = -1;

foreach ( $arr as $k => $v ) {
			if ( ++$next_key !== $k ) {
				return false;
			}
		}

return true;
	}
}

if ( ! function_exists( 'str_contains' ) ) {
	/**
	 * Polyfill for `str_contains()` function added in PHP 8.0.
	 *
	 * Performs a case-sensitive check indicating if needle is
	 * contained in haystack.
	 *
	 * @since 5.9.0
	 *
	 * @param string $haystack The string to search in.
	 * @param string $needle   The substring to search for in the `$haystack`.
	 * @return bool True if `$needle` is in `$haystack`, otherwise false.
	 */
	function str_contains( $haystack, $needle ) {
		if ( '' === $needle ) {
			return true;
		}

return false !== strpos( $haystack, $needle );
	}
}

if ( ! function_exists( 'str_starts_with' ) ) {
	/**
	 * Polyfill for `str_starts_with()` function added in PHP 8.0.
	 *
	 * Performs a case-sensitive check indicating if
	 * the haystack begins with needle.
	 *
	 * @since 5.9.0
	 *
	 * @param string $haystack The string to search in.
	 * @param string $needle   The substring to search for in the `$haystack`.
	 * @return bool True if `$haystack` starts with `$needle`, otherwise false.
	 */
	function str_starts_with( $haystack, $needle ) {
		if ( '' === $needle ) {
			return true;
		}

return 0 === strpos( $haystack, $needle );
	}
}

if ( ! function_exists( 'str_ends_with' ) ) {
	/**
	 * Polyfill for `str_ends_with()` function added in PHP 8.0.
	 *
	 * Performs a case-sensitive check indicating if
	 * the haystack ends with needle.
	 *
	 * @since 5.9.0
	 *
	 * @param string $haystack The string to search in.
	 * @param string $needle   The substring to search for in the `$haystack`.
	 * @return bool True if `$haystack` ends with `$needle`, otherwise false.
	 */
	function str_ends_with( $haystack, $needle ) {
		if ( '' === $haystack ) {
			return '' === $needle;
		}

$len = strlen( $needle );

return substr( $haystack, -$len, $len ) === $needle;
	}
}

// IMAGETYPE_AVIF constant is only defined in PHP 8.x or later.
if ( ! defined( 'IMAGETYPE_AVIF' ) ) {
	define( 'IMAGETYPE_AVIF', 19 );
}

// IMG_AVIF constant is only defined in PHP 8.x or later.
if ( ! defined( 'IMG_AVIF' ) ) {
	define( 'IMG_AVIF', IMAGETYPE_AVIF );
}

// IMAGETYPE_HEIC constant is not yet defined in PHP as of PHP 8.3.
if ( ! defined( 'IMAGETYPE_HEIC' ) ) {
	define( 'IMAGETYPE_HEIC', 99 );
}

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