Missing Controller

Error: PhpBB3Controller could not be found.

Error: Create the class PhpBB3Controller below in file: app/controllers/php_b_b3_controller.php

<?php
class PhpBB3Controller extends AppController {

	var $name = 'PhpBB3';
}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_controller.ctp