In ```php
config.local.php
<br />
Add this code directly underneath the copyright notice:<br />
<br />
```php
<br />
if ($_SERVER['REMOTE_ADDR'] == '000.000.000.000') {<br />
define('DEVELOPMENT', true);<br />
error_reporting(E_ALL);<br />
ini_set('display_errors', 'On');<br />
}<br />
```<br />
<br />
Where<br />
```php
000.000.000.000
``` equals your IP address.<br />
This will allow you to review any error messages when displayed, and not to your customers.