laravel/app/config/local/app.php

<?php

return array(

	/*
	|--------------------------------------------------------------------------
	| Application Debug Mode
	|--------------------------------------------------------------------------
	|
	| When your application is in debug mode, detailed error messages with
	| stack traces will be shown on every error that occurs within your
	| application. If disabled, a simple generic error page is shown.
	|
	*/

	'debug' => true,

);