writing-an-api-1.php

<?php

public function __call($method, $arguments) {

	$realMethodName = "_" . $method;

	if (method_exists($this, $realMethodName)) {

		$response = $this->callOldVersion($arguments);

		if ($response) {
			
			return $response;
        	}

		return call_user_func_array(array($this, $realMethodName), $arguments); 
    	}
}