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"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_chr' ) ) : /** * Compat function to mimic mb_chr(). * * @ignore * @since 7.1.0 * * @see _mb_ord() * * @param int $codepoint A Unicode codepoint value, e.g. 128024 for U+1F418 ELEPHANT * @param "UTF-8"|null $encoding Must be 'UTF-8' or null. * @return string|false A string containing the requested character, if it can be represented in the specified encoding or false on failure. */ function mb_chr( $codepoint, $encoding = null ) { return _mb_chr( $codepoint, $encoding ); } endif; /** * Internal compat function to mimic mb_chr(). * * @ignore * @since 7.1.0 * * @param int $codepoint A Unicode codepoint value, e.g. 128024 for U+1F418 ELEPHANT * @param "UTF-8"|null $encoding Must be 'UTF-8' or null. * @return string|false A string containing the requested character, if it can be represented in the specified encoding or false on failure. */ function _mb_chr( $codepoint, $encoding = null ) { if ( ! is_int( $codepoint ) || ( isset( $encoding ) && 'UTF-8' !== $encoding ) ) { return false; } // Pre-check to ensure a valid code point. if ( $codepoint < 0 || ( $codepoint >= 0xD800 && $codepoint <= 0xDFFF ) || $codepoint > 0x10FFFF ) { return false; } if ( $codepoint <= 0x7F ) { return chr( $codepoint ); } if ( $codepoint <= 0x7FF ) { $byte1 = chr( ( $codepoint >> 6 ) | 0xC0 ); $byte2 = chr( $codepoint & 0x3F | 0x80 ); return "{$byte1}{$byte2}"; } if ( $codepoint <= 0xFFFF ) { $byte1 = chr( ( $codepoint >> 12 ) | 0xE0 ); $byte2 = chr( ( $codepoint >> 6 ) & 0x3F | 0x80 ); $byte3 = chr( $codepoint & 0x3F | 0x80 ); return "{$byte1}{$byte2}{$byte3}"; } // Any values above U+10FFFF are eliminated above in the pre-check. $byte1 = chr( ( $codepoint >> 18 ) | 0xF0 ); $byte2 = chr( ( $codepoint >> 12 ) & 0x3F | 0x80 ); $byte3 = chr( ( $codepoint >> 6 ) & 0x3F | 0x80 ); $byte4 = chr( $codepoint & 0x3F | 0x80 ); return "{$byte1}{$byte2}{$byte3}{$byte4}"; } if ( ! function_exists( 'mb_ord' ) ) : /** * Compat function to mimic mb_ord(). * * @ignore * @since 7.1.0 * * @see _mb_ord() * * @param string $string Return the code point at the start of this string. * @param "UTF-8"|null $encoding Must be 'UTF-8' or null. * @return int|false The Unicode code point for the first character of string or false on failure. */ function mb_ord( $string, $encoding = null ) { return _mb_ord( $string, $encoding ); } endif; /** * Internal compat function to mimic mb_ord(). * * @ignore * @since 7.1.0 * * @param string $string Return the code point at the start of this string. * @param "UTF-8"|null $encoding Must be 'UTF-8' or null. * @return int|false The Unicode code point for the first character of string or false on failure. */ function _mb_ord( $string, $encoding = null ) { if ( ! is_string( $string ) || '' === $string || ( isset( $encoding ) && 'UTF-8' !== $encoding ) ) { return false; } $byte_length = 0; $invalid_length = 0; $found_count = _wp_scan_utf8( $string, $byte_length, $invalid_length, null, 1 ); if ( 1 !== $found_count ) { return false; } // These are valid code points, so no further validation is required. $b0 = ord( $string[0] ); switch ( $byte_length ) { case 1: return $b0; case 2: return ( ( ( $b0 & 0x1F ) << 6 ) | ( ( ord( $string[1] ) & 0x3F ) ) ); case 3: return ( ( ( $b0 & 0x0F ) << 12 ) | ( ( ord( $string[1] ) & 0x3F ) << 6 ) | ( ( ord( $string[2] ) & 0x3F ) ) ); case 4: return ( ( ( $b0 & 0x07 ) << 18 ) | ( ( ord( $string[1] ) & 0x3F ) << 12 ) | ( ( ord( $string[2] ) & 0x3F ) << 6 ) | ( ( ord( $string[3] ) & 0x3F ) ) ); } return false; } 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' ) ) ) { $result = is_null( $length ) ? substr( $str, $start ) : substr( $str, $start, $length ); /* * For an out-of-range start, substr() returns false on PHP < 8.0 but an * empty string on PHP >= 8.0. mb_substr() always returns an empty string, * so normalize to match its behavior across all supported PHP versions. */ return false === $result ? '' : $result; } $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( $utf8_text ); } endif; endif; // sodium_crypto_box() was introduced with Sodium in PHP 7.2, but the extension may not be enabled. if ( ! function_exists( 'sodium_crypto_box' ) ) { require ABSPATH . WPINC . '/sodium_compat/autoload.php'; } if ( ! function_exists( 'array_is_list' ) ) { /** * Polyfill for `array_is_list()` function added in PHP 8.1. * * Determines if the given array is a list. * * An array is considered a list if its keys consist of consecutive numbers from 0 to count($array)-1. * * @see https://github.com/symfony/polyfill-php81/tree/main * * @since 6.5.0 * * @param array $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 ) ]; } } if ( ! function_exists( 'clamp' ) ) { /** * Polyfill for `clamp()` function added in PHP 8.6. * * Clamps a value to be within the range of a given minimum and maximum. * * If the value is within the bounds, the original value is returned. * If it is not within the bounds, the closest bound is returned. * * @since 7.1.0 * * @param mixed $value The value to clamp. * @param mixed $min The minimum bound. Must be less than or equal to `$max`. * @param mixed $max The maximum bound. Must be greater than or equal to `$min`. * @return mixed The clamped value. Either `$value`, `$min`, or `$max`. * * @throws ValueError If `$min` is greater than `$max`, or if `$min` or `$max` is NAN, and the ValueError class exists (PHP 8.0+ or polyfilled). * @throws InvalidArgumentException If `$min` is greater than `$max`, or if `$min` or `$max` is NAN, and the ValueError class does not exist (PHP 7.x). * * @phpstan-template TValue * @phpstan-template TMin * @phpstan-template TMax * @phpstan-param TValue $value * @phpstan-param TMin $min * @phpstan-param TMax $max * @phpstan-return TValue|TMin|TMax */ function clamp( $value, $min, $max ) { $throw_value_error = static function ( string $message ) { // The ValueError class was introduced in PHP 8, so in 7.4 throw InvalidArgumentException instead. if ( ! class_exists( 'ValueError', false ) ) { throw new InvalidArgumentException( $message ); } throw new ValueError( $message ); }; if ( is_float( $min ) && is_nan( $min ) ) { $throw_value_error( 'clamp(): Argument #2 ($min) must not be NAN' ); } if ( is_float( $max ) && is_nan( $max ) ) { $throw_value_error( 'clamp(): Argument #3 ($max) must not be NAN' ); } if ( $max < $min ) { $throw_value_error( 'clamp(): Argument #2 ($min) must be smaller than or equal to argument #3 ($max)' ); } /* * The upper bound is checked before the lower bound to match the order in PHP's * implementation. Comparison in PHP is not transitive when operands of different * types are mixed (for example, comparing against a bool coerces both operands to * bool), so both bounds can compare as exceeded at once, and the first check wins. */ if ( $value > $max ) { return $max; } if ( $value < $min ) { return $min; } return $value; } } // 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 ); }