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Edit File : compat.php \| Size : 17.41 KB
<?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( '_' ) ) { /* * Compat function to mimic _(), an alias of gettext(). * * @since 0.71 * * @see https://php.net/manual/en/function.gettext.php * * @param string $message The message being translated. * @return string / function _( $message ) { return $message; } } /* * Returns whether PCRE/u (PCRE_UTF8 modifier) is available for use. * * @ignore * @since 4.2.2 * @since 6.9.0 Deprecated the `$set` argument. * @access private * * @param bool $set Deprecated. This argument is no longer used for testing purposes. / function _wp_can_use_pcre_u( $set = null ) { static $utf8_pcre = null; if ( isset( $set ) ) { _deprecated_argument( __FUNCTION__, '6.9.0' ); } if ( isset( $utf8_pcre ) ) { return $utf8_pcre; } $utf8_pcre = true; set_error_handler( function ( $errno, $errstr ) use ( &$utf8_pcre ) { if ( str_starts_with( $errstr, 'preg_match():' ) ) { $utf8_pcre = false; return true; } return false; }, E_WARNING ); / * Attempt to compile a PCRE pattern with the PCRE_UTF8 flag. For * systems lacking Unicode support this will trigger a warning * during compilation, which the error handler will intercept. / preg_match( '//u', '' ); restore_error_handler(); 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 supports UTF-8 and non-shifting single-byte encodings. For all other encodings * expect the substrings to be misaligned. When the given encoding (or the `blog_charset` * if none is provided) isn’t UTF-8 then the function returns the output of {@see \substr()}. * * @ignore * @since 3.2.0 * * @param string $str The string to extract the substring from. * @param int $start Character offset at which to start the substring extraction. * @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 ''; } // The solution below works only for UTF-8; treat all other encodings as byte streams. if ( ! _is_utf8_charset( $encoding ?? get_option( 'blog_charset' ) ) ) { return is_null( $length ) ? substr( $str, $start ) : substr( $str, $start, $length ); } $total_length = ( $start < 0 \|\| $length < 0 ) ? _wp_utf8_codepoint_count( $str ) : 0; $normalized_start = $start < 0 ? max( 0, $total_length + $start ) : $start; / * The starting offset is provided as characters, which means this needs to * find how many bytes that many characters occupies at the start of the string. / $starting_byte_offset = _wp_utf8_codepoint_span( $str, 0, $normalized_start ); $normalized_length = $length < 0 ? max( 0, $total_length - $normalized_start + $length ) : $length; / * This is the main step. It finds how many bytes the given length of code points * occupies in the input, starting at the byte offset calculated above. / $byte_length = isset( $normalized_length ) ? _wp_utf8_codepoint_span( $str, $starting_byte_offset, $normalized_length ) : ( strlen( $str ) - $starting_byte_offset ); // The result is a normal byte-level substring using the computed ranges. return substr( $str, $starting_byte_offset, $byte_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 supports UTF-8 and non-shifting single-byte encodings. For all other * encodings expect the counts to be wrong. When the given encoding (or the * `blog_charset` if none is provided) isn’t UTF-8 then the function returns * the byte-count of the provided string. * * @ignore * @since 4.2.0 * * @param string $str The string to retrieve the character length from. * @param string\|null $encoding Optional. Count characters according to this encoding. * Default is to consult `blog_charset`. * @return int Count of code points if UTF-8, byte length otherwise. / function _mb_strlen( $str, $encoding = null ) { return _is_utf8_charset( $encoding ?? get_option( 'blog_charset' ) ) ? _wp_utf8_codepoint_count( $str ) : strlen( $str ); } if ( ! function_exists( 'utf8_encode' ) ) : if ( extension_loaded( 'mbstring' ) ) : /* * Converts a string from ISO-8859-1 to UTF-8. * * @deprecated Use {@see \mb_convert_encoding()} instead. * * @since 6.9.0 * * @param string $iso_8859_1_text Text treated as ISO-8859-1 (latin1) bytes. * @return string Text converted into a UTF-8. / function utf8_encode( $iso_8859_1_text ): string { _deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' ); return mb_convert_encoding( $iso_8859_1_text, 'UTF-8', 'ISO-8859-1' ); } else : /* * @ignore * @private * * @since 6.9.0 / function utf8_encode( $iso_8859_1_text ): string { _deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' ); return _wp_utf8_encode_fallback( $iso_8859_1_text ); } endif; endif; if ( ! function_exists( 'utf8_decode' ) ) : if ( extension_loaded( 'mbstring' ) ) : /* * Converts a string from UTF-8 to ISO-8859-1. * * @deprecated Use {@see \mb_convert_encoding()} instead. * * @since 6.9.0 * * @param string $utf8_text Text treated as UTF-8. * @return string Text converted into ISO-8859-1. / function utf8_decode( $utf8_text ): string { _deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' ); return mb_convert_encoding( $utf8_text, 'ISO-8859-1', 'UTF-8' ); } else : /* * @ignore * @private * * @since 6.9.0 / function utf8_decode( $utf8_text ): string { _deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' ); return _wp_utf8_decode_fallback( $utf8_text ); } endif; 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 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; } } if ( ! function_exists( 'array_first' ) ) { /* * Polyfill for `array_first()` function added in PHP 8.5. * * Returns the first element of an array. * * @since 6.9.0 * * @param array $array The array to get the first element from. * @return mixed\|null The first element of the array, or null if the array is empty. / function array_first( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound if ( empty( $array ) ) { return null; } foreach ( $array as $value ) { return $value; } } } if ( ! function_exists( 'array_last' ) ) { /* * Polyfill for `array_last()` function added in PHP 8.5. * * Returns the last element of an array. * * @since 6.9.0 * * @param array $array The array to get the last element from. * @return mixed\|null The last element of the array, or null if the array is empty. */ function array_last( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound if ( empty( $array ) ) { return null; } return $array[ array_key_last( $array ) ]; } } // 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_HEIF constant is only defined in PHP 8.5 or later. if ( ! defined( 'IMAGETYPE_HEIF' ) ) { define( 'IMAGETYPE_HEIF', 20 ); } Back

Edit File : compat.php | Size : 17.41 KB

<?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( '_' ) ) {
	/**
	 * Compat function to mimic _(), an alias of gettext().
	 *
	 * @since 0.71
	 *
	 * @see https://php.net/manual/en/function.gettext.php
	 *
	 * @param string $message The message being translated.
	 * @return string
	 */
	function _( $message ) {
		return $message;
	}
}

/**
 * Returns whether PCRE/u (PCRE_UTF8 modifier) is available for use.
 *
 * @ignore
 * @since 4.2.2
 * @since 6.9.0 Deprecated the `$set` argument.
 * @access private
 *
 * @param bool $set Deprecated. This argument is no longer used for testing purposes.
 */
function _wp_can_use_pcre_u( $set = null ) {
	static $utf8_pcre = null;

if ( isset( $set ) ) {
		_deprecated_argument( __FUNCTION__, '6.9.0' );
	}

if ( isset( $utf8_pcre ) ) {
		return $utf8_pcre;
	}

$utf8_pcre = true;
	set_error_handler(
		function ( $errno, $errstr ) use ( &$utf8_pcre ) {
			if ( str_starts_with( $errstr, 'preg_match():' ) ) {
				$utf8_pcre = false;
				return true;
			}

return false;
		},
		E_WARNING
	);

/*
	 * Attempt to compile a PCRE pattern with the PCRE_UTF8 flag. For
	 * systems lacking Unicode support this will trigger a warning
	 * during compilation, which the error handler will intercept.
	 */
	preg_match( '//u', '' );
	restore_error_handler();

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 supports UTF-8 and non-shifting single-byte encodings. For all other encodings
 * expect the substrings to be misaligned. When the given encoding (or the `blog_charset`
 * if none is provided) isn’t UTF-8 then the function returns the output of {@see \substr()}.
 *
 * @ignore
 * @since 3.2.0
 *
 * @param string      $str      The string to extract the substring from.
 * @param int         $start    Character offset at which to start the substring extraction.
 * @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 '';
	}

// The solution below works only for UTF-8; treat all other encodings as byte streams.
	if ( ! _is_utf8_charset( $encoding ?? get_option( 'blog_charset' ) ) ) {
		return is_null( $length ) ? substr( $str, $start ) : substr( $str, $start, $length );
	}

$total_length = ( $start < 0 || $length < 0 )
		? _wp_utf8_codepoint_count( $str )
		: 0;

$normalized_start = $start < 0
		? max( 0, $total_length + $start )
		: $start;

/*
	 * The starting offset is provided as characters, which means this needs to
	 * find how many bytes that many characters occupies at the start of the string.
	 */
	$starting_byte_offset = _wp_utf8_codepoint_span( $str, 0, $normalized_start );

$normalized_length = $length < 0
		? max( 0, $total_length - $normalized_start + $length )
		: $length;

/*
	 * This is the main step. It finds how many bytes the given length of code points
	 * occupies in the input, starting at the byte offset calculated above.
	 */
	$byte_length = isset( $normalized_length )
		? _wp_utf8_codepoint_span( $str, $starting_byte_offset, $normalized_length )
		: ( strlen( $str ) - $starting_byte_offset );

// The result is a normal byte-level substring using the computed ranges.
	return substr( $str, $starting_byte_offset, $byte_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 supports UTF-8 and non-shifting single-byte encodings. For all other
 * encodings expect the counts to be wrong. When the given encoding (or the
 * `blog_charset` if none is provided) isn’t UTF-8 then the function returns
 * the byte-count of the provided string.
 *
 * @ignore
 * @since 4.2.0
 *
 * @param string      $str      The string to retrieve the character length from.
 * @param string|null $encoding Optional. Count characters according to this encoding.
 *                              Default is to consult `blog_charset`.
 * @return int Count of code points if UTF-8, byte length otherwise.
 */
function _mb_strlen( $str, $encoding = null ) {
	return _is_utf8_charset( $encoding ?? get_option( 'blog_charset' ) )
		? _wp_utf8_codepoint_count( $str )
		: strlen( $str );
}

if ( ! function_exists( 'utf8_encode' ) ) :
	if ( extension_loaded( 'mbstring' ) ) :
		/**
		 * Converts a string from ISO-8859-1 to UTF-8.
		 *
		 * @deprecated Use {@see \mb_convert_encoding()} instead.
		 *
		 * @since 6.9.0
		 *
		 * @param string $iso_8859_1_text Text treated as ISO-8859-1 (latin1) bytes.
		 * @return string Text converted into a UTF-8.
		 */
		function utf8_encode( $iso_8859_1_text ): string {
			_deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' );

return mb_convert_encoding( $iso_8859_1_text, 'UTF-8', 'ISO-8859-1' );
		}

else :
		/**
		 * @ignore
		 * @private
		 *
		 * @since 6.9.0
		 */
		function utf8_encode( $iso_8859_1_text ): string {
			_deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' );

return _wp_utf8_encode_fallback( $iso_8859_1_text );
		}

endif;
endif;

if ( ! function_exists( 'utf8_decode' ) ) :
	if ( extension_loaded( 'mbstring' ) ) :
		/**
		 * Converts a string from UTF-8 to ISO-8859-1.
		 *
		 * @deprecated Use {@see \mb_convert_encoding()} instead.
		 *
		 * @since 6.9.0
		 *
		 * @param string $utf8_text Text treated as UTF-8.
		 * @return string Text converted into ISO-8859-1.
		 */
		function utf8_decode( $utf8_text ): string {
			_deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' );

return mb_convert_encoding( $utf8_text, 'ISO-8859-1', 'UTF-8' );
		}

else :
		/**
		 * @ignore
		 * @private
		 *
		 * @since 6.9.0
		 */
		function utf8_decode( $utf8_text ): string {
			_deprecated_function( __FUNCTION__, '6.9.0', 'mb_convert_encoding' );

return _wp_utf8_decode_fallback( $utf8_text );
		}

endif;
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
		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;
	}
}

if ( ! function_exists( 'array_first' ) ) {
	/**
	 * Polyfill for `array_first()` function added in PHP 8.5.
	 *
	 * Returns the first element of an array.
	 *
	 * @since 6.9.0
	 *
	 * @param array $array The array to get the first element from.
	 * @return mixed|null The first element of the array, or null if the array is empty.
	 */
	function array_first( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		if ( empty( $array ) ) {
			return null;
		}

foreach ( $array as $value ) {
			return $value;
		}
	}
}

if ( ! function_exists( 'array_last' ) ) {
	/**
	 * Polyfill for `array_last()` function added in PHP 8.5.
	 *
	 * Returns the last element of an array.
	 *
	 * @since 6.9.0
	 *
	 * @param array $array The array to get the last element from.
	 * @return mixed|null The last element of the array, or null if the array is empty.
	 */
	function array_last( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
		if ( empty( $array ) ) {
			return null;
		}

return $array[ array_key_last( $array ) ];
	}
}

// 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_HEIF constant is only defined in PHP 8.5 or later.
if ( ! defined( 'IMAGETYPE_HEIF' ) ) {
	define( 'IMAGETYPE_HEIF', 20 );
}

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