Same problem here, nothing happens when I set it to "true".
define('_PS_MODE_DEV_', true);
if (_PS_MODE_DEV_)
{
@ini_set('display_errors', 'on');
@error_reporting(E_ALL | E_STRICT);
define('_PS_DEBUG_SQL_', true);
/* Compatibility warning */
define('_PS_DISPLAY_COMPATIBILITY_WARNING_', true);
}
else
{
@ini_set('display_errors', 'off');
define('_PS_DEBUG_SQL_', false);
/* Compatibility warning */
define('_PS_DISPLAY_COMPATIBILITY_WARNING_', false);
}
define('_PS_DEBUG_PROFILING_', false);
define('_PS_MODE_DEMO_', false);