<?php



#[AllowDynamicProperties]
class WP_MatchesMapRegex {
	
	private $_matches;

	
	public $output;

	
	private $_subject;

	
	public $_pattern = '(\$matches\[[1-9]+[0-9]*\])'; // Magic number.

	
	public function __construct( $subject, $matches ) {
		$this->_subject = $subject;
		$this->_matches = $matches;
		$this->output   = $this->_map();
	}

	
	public static function apply( $subject, $matches ) {
		$result = new WP_MatchesMapRegex( $subject, $matches );
		return $result->output;
	}

	
	private function _map() {
		$callback = array( $this, 'callback' );
		return preg_replace_callback( $this->_pattern, $callback, $this->_subject );
	}

	
	public function callback( $matches ) {
		$index = (int) substr( $matches[0], 9, -1 );
		return ( isset( $this->_matches[ $index ] ) ? urlencode( $this->_matches[ $index ] ) : '' );
	}
}