'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 $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 f