I want to use this:
```php/* Debug only /
if ($_SERVER['QUERY_STRING'] == 'error') {
define('_PS_MODE_DEV_', true);
}else{
define('_PS_MODE_DEV_', false);
}
/ Compatibility warning */
define('_PS_DISPLAY_COMPATIBILITY_WARNING_', false);
if (_PS_MODE_DEV_ === true) {
@ini_set('display_errors', 'on');
@error_reporting(E_ALL | E_STRICT);
define('_PS_DEBUG_SQL_', true);
} else {
@ini_set('display_errors', 'off');
define('_PS_DEBUG_SQL_', false);
}
if ($SERVER['QUERYSTRING'] == 'profile') {
define('PSDEBUGPROFILING', true);
}else{
define('PSDEBUGPROFILING', false);
}
```
in my defines.inc.php but when I replace the coresponding lines in the file I can't install modules. It gives 'this functionality has been disabled'. I would like to use this function that way instead of the BO option because it quicker and more convenient.