_subject = $subject; $this->_matches = $matches; $this->output = $this->_map(); } /** * Substitute substring matches in subject. * * static helper function to ease use * * @param string $subject subject * @param array $matches data used for substitution * @return string */ public static function apply( $subject, $matches ) { $result = new WP_MatchesMapRegex( $subject, $matches ); return $result->output; } /** * do the actual mapping * * @return string */ private function _map() { $callback = array( $this, 'callback' ); return preg_replace_callback( $this->_pattern, $callback, $this->_subject ); } /** * preg_replace_callback hook * * @param array $matches preg_replace regexp matches * @return string */ public function callback( $matches ) { $index = (int) substr( $matches[0], 9, -1 ); return ( isset( $this->_matches[ $index ] ) ? urlencode( $this->_matches[ $index ] ) : '' ); } } My Blog – My WordPress Blog

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