extract() example

action_string.php

<?php

class Router {

    // ...

    private function _action_string($parsed_action)
    {
        // without extract
        $parsed_action['params'] = implode('/', $parsed_action['params']);
        $action = implode('/', array($parsed_action['controller_name'], $parsed_action['mehtod'], $parsed_action['params']));
        
        // with extract
        extract($parsed_action);
        $params = implode('/', $parsed_action['params']);
        return implode('/', array($controller_name, $method, $params));
    }
}