defaultroutning.php

<?php 

//Save the Route 

class Router {
    /** ... **/

    public static function connect($route, $defaults = array(), $options = array());
 
    /** ... **/
}

?>

<?php 

//Match the url

class CakeRoute {
    public function match($url) {
        /** ... **/
        // Missing defaults is a fail.
	if (array_diff_key($defaults, $url) !== array()) {
	    return false;
	}
        /** ... **/
    }   
}