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📁 SimplePie	Folder	-
📁 Text	Folder	-
📄 admin-bar.php	File	37106	Edit Download
📁 assets	Folder	-
📄 atomlib.php	File	12078	Edit Download
📄 author-template.php	File	18951	Edit Download
📁 block-bindings	Folder	-
📄 block-bindings.php	File	5594	Edit Download
📄 block-editor.php	File	28797	Edit Download
📄 block-i18n.json	File	316	Edit Download
📁 block-patterns	Folder	-
📄 block-patterns.php	File	13213	Edit Download
📁 block-supports	Folder	-
📄 block-template-utils.php	File	61907	Edit Download
📄 block-template.php	File	15356	Edit Download
📁 blocks	Folder	-
📄 blocks.php	File	113051	Edit Download
📄 bookmark-template.php	File	12768	Edit Download
📄 bookmark.php	File	15427	Edit Download
📄 cache-compat.php	File	5969	Edit Download
📄 cache.php	File	13474	Edit Download
📄 canonical.php	File	34523	Edit Download
📄 capabilities.php	File	42718	Edit Download
📄 category-template.php	File	57003	Edit Download
📄 category.php	File	12829	Edit Download
📁 certificates	Folder	-
📄 class-IXR.php	File	2616	Edit Download
📄 class-avif-info.php	File	29615	Edit Download
📄 class-feed.php	File	539	Edit Download
📄 class-http.php	File	367	Edit Download
📄 class-json.php	File	43684	Edit Download
📄 class-oembed.php	File	401	Edit Download
📄 class-phpass.php	File	6771	Edit Download
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📄 class-pop3.php	File	21121	Edit Download
📄 class-requests.php	File	2237	Edit Download
📄 class-simplepie.php	File	453	Edit Download
📄 class-smtp.php	File	457	Edit Download
📄 class-snoopy.php	File	37715	Edit Download
📄 class-walker-category-dropdown.php	File	2469	Edit Download
📄 class-walker-category.php	File	8477	Edit Download
📄 class-walker-comment.php	File	14221	Edit Download
📄 class-walker-nav-menu.php	File	12044	Edit Download
📄 class-walker-page-dropdown.php	File	2710	Edit Download
📄 class-walker-page.php	File	7612	Edit Download
📄 class-wp-admin-bar.php	File	17874	Edit Download
📄 class-wp-ajax-response.php	File	5266	Edit Download
📄 class-wp-application-passwords.php	File	17099	Edit Download
📄 class-wp-block-bindings-registry.php	File	8463	Edit Download
📄 class-wp-block-bindings-source.php	File	2992	Edit Download
📄 class-wp-block-editor-context.php	File	1350	Edit Download
📄 class-wp-block-list.php	File	4757	Edit Download
📄 class-wp-block-metadata-registry.php	File	11895	Edit Download
📄 class-wp-block-parser-block.php	File	2555	Edit Download
📄 class-wp-block-parser-frame.php	File	2017	Edit Download
📄 class-wp-block-parser.php	File	11532	Edit Download
📄 class-wp-block-pattern-categories-registry.php	File	5371	Edit Download
📄 class-wp-block-patterns-registry.php	File	10783	Edit Download
📄 class-wp-block-styles-registry.php	File	6403	Edit Download
📄 class-wp-block-supports.php	File	5626	Edit Download
📄 class-wp-block-template.php	File	2033	Edit Download
📄 class-wp-block-templates-registry.php	File	7231	Edit Download
📄 class-wp-block-type-registry.php	File	5013	Edit Download
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📄 class-wp-block.php	File	23041	Edit Download
📄 class-wp-classic-to-block-menu-converter.php	File	4088	Edit Download
📄 class-wp-comment-query.php	File	48395	Edit Download
📄 class-wp-comment.php	File	9437	Edit Download
📄 class-wp-customize-control.php	File	25851	Edit Download
📄 class-wp-customize-manager.php	File	202593	Edit Download
📄 class-wp-customize-nav-menus.php	File	57660	Edit Download
📄 class-wp-customize-panel.php	File	10710	Edit Download
📄 class-wp-customize-section.php	File	11209	Edit Download
📄 class-wp-customize-setting.php	File	29962	Edit Download
📄 class-wp-customize-widgets.php	File	72210	Edit Download
📄 class-wp-date-query.php	File	35732	Edit Download
📄 class-wp-dependencies.php	File	15139	Edit Download
📄 class-wp-dependency.php	File	2627	Edit Download
📄 class-wp-duotone.php	File	40783	Edit Download
📄 class-wp-editor.php	File	72335	Edit Download
📄 class-wp-embed.php	File	15931	Edit Download
📄 class-wp-error.php	File	7502	Edit Download
📄 class-wp-exception.php	File	253	Edit Download
📄 class-wp-fatal-error-handler.php	File	8150	Edit Download
📄 class-wp-feed-cache-transient.php	File	3176	Edit Download
📄 class-wp-feed-cache.php	File	969	Edit Download
📄 class-wp-hook.php	File	16000	Edit Download
📄 class-wp-http-cookie.php	File	7389	Edit Download
📄 class-wp-http-curl.php	File	12541	Edit Download
📄 class-wp-http-encoding.php	File	6689	Edit Download
📄 class-wp-http-ixr-client.php	File	3501	Edit Download
📄 class-wp-http-proxy.php	File	5980	Edit Download
📄 class-wp-http-requests-hooks.php	File	2022	Edit Download
📄 class-wp-http-requests-response.php	File	4400	Edit Download
📄 class-wp-http-response.php	File	2977	Edit Download
📄 class-wp-http-streams.php	File	16859	Edit Download
📄 class-wp-http.php	File	41579	Edit Download
📄 class-wp-image-editor-gd.php	File	20162	Edit Download
📄 class-wp-image-editor-imagick.php	File	34735	Edit Download
📄 class-wp-image-editor.php	File	17527	Edit Download
📄 class-wp-list-util.php	File	7443	Edit Download
📄 class-wp-locale-switcher.php	File	6776	Edit Download
📄 class-wp-locale.php	File	16883	Edit Download
📄 class-wp-matchesmapregex.php	File	1828	Edit Download
📄 class-wp-meta-query.php	File	30531	Edit Download
📄 class-wp-metadata-lazyloader.php	File	6833	Edit Download
📄 class-wp-navigation-fallback.php	File	9211	Edit Download
📄 class-wp-network-query.php	File	19857	Edit Download
📄 class-wp-network.php	File	12296	Edit Download
📄 class-wp-object-cache.php	File	17524	Edit Download
📄 class-wp-oembed-controller.php	File	6905	Edit Download
📄 class-wp-oembed.php	File	31606	Edit Download
📄 class-wp-paused-extensions-storage.php	File	5111	Edit Download
📄 class-wp-phpmailer.php	File	3802	Edit Download
📄 class-wp-plugin-dependencies.php	File	25315	Edit Download
📄 class-wp-post-type.php	File	30680	Edit Download
📄 class-wp-post.php	File	6488	Edit Download
📄 class-wp-query.php	File	158023	Edit Download
📄 class-wp-recovery-mode-cookie-service.php	File	6877	Edit Download
📄 class-wp-recovery-mode-email-service.php	File	11183	Edit Download
📄 class-wp-recovery-mode-key-service.php	File	4884	Edit Download
📄 class-wp-recovery-mode-link-service.php	File	3463	Edit Download
📄 class-wp-recovery-mode.php	File	11453	Edit Download
📄 class-wp-rewrite.php	File	63688	Edit Download
📄 class-wp-role.php	File	2523	Edit Download
📄 class-wp-roles.php	File	8586	Edit Download
📄 class-wp-script-modules.php	File	19463	Edit Download
📄 class-wp-scripts.php	File	28344	Edit Download
📄 class-wp-session-tokens.php	File	7319	Edit Download
📄 class-wp-simplepie-file.php	File	3408	Edit Download
📄 class-wp-simplepie-sanitize-kses.php	File	1910	Edit Download
📄 class-wp-site-query.php	File	31625	Edit Download
📄 class-wp-site.php	File	7454	Edit Download
📄 class-wp-speculation-rules.php	File	7527	Edit Download
📄 class-wp-styles.php	File	11010	Edit Download
📄 class-wp-tax-query.php	File	19555	Edit Download
📄 class-wp-taxonomy.php	File	18559	Edit Download
📄 class-wp-term-query.php	File	40869	Edit Download
📄 class-wp-term.php	File	5298	Edit Download
📄 class-wp-text-diff-renderer-inline.php	File	979	Edit Download
📄 class-wp-text-diff-renderer-table.php	File	18880	Edit Download
📄 class-wp-textdomain-registry.php	File	10481	Edit Download
📄 class-wp-theme-json-data.php	File	1809	Edit Download
📄 class-wp-theme-json-resolver.php	File	35738	Edit Download
📄 class-wp-theme-json-schema.php	File	7367	Edit Download
📄 class-wp-theme-json.php	File	163545	Edit Download
📄 class-wp-theme.php	File	65810	Edit Download
📄 class-wp-token-map.php	File	28618	Edit Download
📄 class-wp-url-pattern-prefixer.php	File	4802	Edit Download
📄 class-wp-user-meta-session-tokens.php	File	2990	Edit Download
📄 class-wp-user-query.php	File	43655	Edit Download
📄 class-wp-user-request.php	File	2305	Edit Download
📄 class-wp-user.php	File	22994	Edit Download
📄 class-wp-walker.php	File	13322	Edit Download
📄 class-wp-widget-factory.php	File	3347	Edit Download
📄 class-wp-widget.php	File	18429	Edit Download
📄 class-wp-xmlrpc-server.php	File	215444	Edit Download
📄 class-wp.php	File	26318	Edit Download
📄 class-wpdb.php	File	118284	Edit Download
📄 class.wp-dependencies.php	File	373	Edit Download
📄 class.wp-scripts.php	File	343	Edit Download
📄 class.wp-styles.php	File	338	Edit Download
📄 comment-template.php	File	103104	Edit Download
📄 comment.php	File	131547	Edit Download
📄 compat.php	File	16376	Edit Download
📄 cron.php	File	42658	Edit Download
📁 css	Folder	-
📁 customize	Folder	-
📄 date.php	File	400	Edit Download
📄 default-constants.php	File	11365	Edit Download
📄 default-filters.php	File	36697	Edit Download
📄 default-widgets.php	File	2295	Edit Download
📄 deprecated.php	File	191563	Edit Download
📄 embed-template.php	File	338	Edit Download
📄 embed.php	File	38172	Edit Download
📄 error-protection.php	File	4121	Edit Download
📄 feed-atom-comments.php	File	5504	Edit Download
📄 feed-atom.php	File	3121	Edit Download
📄 feed-rdf.php	File	2668	Edit Download
📄 feed-rss.php	File	1189	Edit Download
📄 feed-rss2-comments.php	File	4136	Edit Download
📄 feed-rss2.php	File	3799	Edit Download
📄 feed.php	File	23411	Edit Download
📁 fonts	Folder	-
📄 fonts.php	File	9751	Edit Download
📄 formatting.php	File	342921	Edit Download
📄 functions.php	File	287546	Edit Download
📄 functions.wp-scripts.php	File	14558	Edit Download
📄 functions.wp-styles.php	File	8583	Edit Download
📄 general-template.php	File	172498	Edit Download
📄 global-styles-and-settings.php	File	21261	Edit Download
📁 html-api	Folder	-
📄 http.php	File	25312	Edit Download
📄 https-detection.php	File	5857	Edit Download
📄 https-migration.php	File	4741	Edit Download
📁 images	Folder	-
📁 interactivity-api	Folder	-
📁 js	Folder	-
📄 kses.php	File	74472	Edit Download
📁 l10n	Folder	-
📄 l10n.php	File	68530	Edit Download
📄 link-template.php	File	157801	Edit Download
📄 load.php	File	56440	Edit Download
📄 locale.php	File	162	Edit Download
📄 media-template.php	File	63060	Edit Download
📄 media.php	File	220496	Edit Download
📄 meta.php	File	65243	Edit Download
📄 ms-blogs.php	File	25845	Edit Download
📄 ms-default-constants.php	File	4921	Edit Download
📄 ms-default-filters.php	File	6636	Edit Download
📄 ms-deprecated.php	File	21759	Edit Download
📄 ms-files.php	File	2744	Edit Download
📄 ms-functions.php	File	91582	Edit Download
📄 ms-load.php	File	19883	Edit Download
📄 ms-network.php	File	3782	Edit Download
📄 ms-settings.php	File	4197	Edit Download
📄 ms-site.php	File	41320	Edit Download
📄 nav-menu-template.php	File	25990	Edit Download
📄 nav-menu.php	File	44373	Edit Download
📄 option.php	File	103065	Edit Download
📁 php-compat	Folder	-
📄 pluggable-deprecated.php	File	6324	Edit Download
📄 pluggable.php	File	122700	Edit Download
📄 plugin.php	File	35465	Edit Download
📁 pomo	Folder	-
📄 post-formats.php	File	7102	Edit Download
📄 post-template.php	File	68648	Edit Download
📄 post-thumbnail-template.php	File	10879	Edit Download
📄 post.php	File	291712	Edit Download
📄 query.php	File	37035	Edit Download
📄 registration-functions.php	File	200	Edit Download
📄 registration.php	File	200	Edit Download
📁 rest-api	Folder	-
📄 rest-api.php	File	100257	Edit Download
📄 revision.php	File	30741	Edit Download
📄 rewrite.php	File	19541	Edit Download
📄 robots-template.php	File	5185	Edit Download
📄 rss-functions.php	File	255	Edit Download
📄 rss.php	File	23113	Edit Download
📄 script-loader.php	File	133262	Edit Download
📄 script-modules.php	File	7712	Edit Download
📄 session.php	File	258	Edit Download
📄 shortcodes.php	File	24051	Edit Download
📁 sitemaps	Folder	-
📄 sitemaps.php	File	3238	Edit Download
📁 sodium_compat	Folder	-
📄 speculative-loading.php	File	8558	Edit Download
📄 spl-autoload-compat.php	File	441	Edit Download
📁 style-engine	Folder	-
📄 style-engine.php	File	7563	Edit Download
📄 taxonomy.php	File	176227	Edit Download
📄 template-canvas.php	File	544	Edit Download
📄 template-loader.php	File	3012	Edit Download
📄 template.php	File	24154	Edit Download
📁 theme-compat	Folder	-
📄 theme-i18n.json	File	1526	Edit Download
📄 theme-previews.php	File	2832	Edit Download
📄 theme-templates.php	File	6238	Edit Download
📄 theme.json	File	8704	Edit Download
📄 theme.php	File	134303	Edit Download
📄 update.php	File	37503	Edit Download
📄 user.php	File	175823	Edit Download
📄 vars.php	File	6562	Edit Download
📄 version.php	File	1090	Edit Download
📁 widgets	Folder	-
📄 widgets.php	File	70719	Edit Download
📄 wp-db.php	File	445	Edit Download
📄 wp-diff.php	File	799	Edit Download

📝 Editing: compat.php Size: 16,376 bytes Lines: 546 Type: .php

<?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;
}

// 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
		if ( empty( $array ) ) {
			return null;
		}

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;
	}
}

if ( ! function_exists( 'array_find' ) ) {
	/**
	 * Polyfill for `array_find()` function added in PHP 8.4.
	 *
	 * Searches an array for the first element that passes a given callback.
	 *
	 * @since 6.8.0
	 *
	 * @param array    $array    The array to search.
	 * @param callable $callback The callback to run for each element.
	 * @return mixed|null The first element in the array that passes the `$callback`, otherwise null.
	 */
	function array_find( array $array, callable $callback ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		foreach ( $array as $key => $value ) {
			if ( $callback( $value, $key ) ) {
				return $value;
			}
		}

return null;
	}
}

if ( ! function_exists( 'array_find_key' ) ) {
	/**
	 * Polyfill for `array_find_key()` function added in PHP 8.4.
	 *
	 * Searches an array for the first key that passes a given callback.
	 *
	 * @since 6.8.0
	 *
	 * @param array    $array    The array to search.
	 * @param callable $callback The callback to run for each element.
	 * @return int|string|null The first key in the array that passes the `$callback`, otherwise null.
	 */
	function array_find_key( array $array, callable $callback ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		foreach ( $array as $key => $value ) {
			if ( $callback( $value, $key ) ) {
				return $key;
			}
		}

return null;
	}
}

if ( ! function_exists( 'array_any' ) ) {
	/**
	 * Polyfill for `array_any()` function added in PHP 8.4.
	 *
	 * Checks if any element of an array passes a given callback.
	 *
	 * @since 6.8.0
	 *
	 * @param array    $array    The array to check.
	 * @param callable $callback The callback to run for each element.
	 * @return bool True if any element in the array passes the `$callback`, otherwise false.
	 */
	function array_any( array $array, callable $callback ): bool { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		foreach ( $array as $key => $value ) {
			if ( $callback( $value, $key ) ) {
				return true;
			}
		}

return false;
	}
}

if ( ! function_exists( 'array_all' ) ) {
	/**
	 * Polyfill for `array_all()` function added in PHP 8.4.
	 *
	 * Checks if all elements of an array pass a given callback.
	 *
	 * @since 6.8.0
	 *
	 * @param array    $array    The array to check.
	 * @param callable $callback The callback to run for each element.
	 * @return bool True if all elements in the array pass the `$callback`, otherwise false.
	 */
	function array_all( array $array, callable $callback ): bool { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		foreach ( $array as $key => $value ) {
			if ( ! $callback( $value, $key ) ) {
				return false;
			}
		}

return true;
	}
}

// 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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