}
}
-if ( !function_exists('mb_substr') ):
- function mb_substr( $str, $start, $length=null, $encoding=null ) {
- return _mb_substr($str, $start, $length, $encoding);
+/**
+ * Returns whether PCRE/u (PCRE_UTF8 modifier) is available for use.
+ *
+ * @ignore
+ * @since 4.2.2
+ * @access private
+ *
+ * @staticvar string $utf8_pcre
+ *
+ * @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 ) {
+ $utf8_pcre = @preg_match( '/^./u', 'a' );
+ }
+
+ return $utf8_pcre;
+}
+
+if ( ! function_exists( 'mb_substr' ) ) :
+ function mb_substr( $str, $start, $length = null, $encoding = null ) {
+ return _mb_substr( $str, $start, $length, $encoding );
}
endif;
-function _mb_substr( $str, $start, $length=null, $encoding=null ) {
- // the solution below, works only for utf-8, so in case of a different
- // charset, just use built-in substr
- $charset = get_option( 'blog_charset' );
- if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
- return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
- }
- // 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 );
+/*
+ * 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.
+ */
+function _mb_substr( $str, $start, $length = null, $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 substr()
+ if ( ! in_array( $encoding, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
+ 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';
+
+ $chars = array( '' ); // Start with 1 element instead of 0 since the first thing we do is pop
+ 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 );
+ } while ( count( $pieces ) > 1 && $str = array_pop( $pieces ) ); // If there's anything left over, repeat the loop.
+
+ return join( '', array_slice( $chars, $start, $length ) );
+}
+
+if ( ! function_exists( 'mb_strlen' ) ) :
+ function mb_strlen( $str, $encoding = null ) {
+ return _mb_strlen( $str, $encoding );
+ }
+endif;
+
+/*
+ * 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.
+ */
+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 ( ! in_array( $encoding, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
+ 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';
+
+ $count = 1; // Start at 1 instead of 0 since the first thing we do is decrement
+ 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 );
+ } while ( $str = array_pop( $pieces ) ); // If there's anything left over, repeat the loop.
+
+ // Fencepost: preg_split() always returns one extra item in the array
+ return --$count;
}
if ( !function_exists('hash_hmac') ):
function json_encode( $string ) {
global $wp_json;
- if ( !is_a($wp_json, 'Services_JSON') ) {
+ if ( ! ( $wp_json instanceof Services_JSON ) ) {
require_once( ABSPATH . WPINC . '/class-json.php' );
$wp_json = new Services_JSON();
}
}
if ( !function_exists('json_decode') ) {
+ /**
+ * @global Services_JSON $wp_json
+ * @param string $string
+ * @param bool $assoc_array
+ * @return object|array
+ */
function json_decode( $string, $assoc_array = false ) {
global $wp_json;
- if ( !is_a($wp_json, 'Services_JSON') ) {
+ if ( ! ($wp_json instanceof Services_JSON ) ) {
require_once( ABSPATH . WPINC . '/class-json.php' );
$wp_json = new Services_JSON();
}
$res = _json_decode_object_helper( $res );
return $res;
}
+
+ /**
+ * @param object $data
+ * @return array
+ */
function _json_decode_object_helper($data) {
if ( is_object($data) )
$data = get_object_vars($data);
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff