// display_errors and sql debug is automatically set to on when dev mode is activated

config/config.inc.php

@@ -26,8 +26,17 @@
 */
 
 /* Debug only */
-@ini_set('display_errors', 'on');
-define('_PS_DEBUG_SQL_', true);
+define('_PS_MODE_DEV_', true);
+if (_PS_MODE_DEV_)
+{
+	@ini_set('display_errors', 'on');	
+	define('_PS_DEBUG_SQL_', true);
+}
+else
+{
+	@ini_set('display_errors', 'off');
+	define('_PS_DEBUG_SQL_', false);
+}
 
 $start_time = microtime(true);
 

config/defines.inc.php

@@ -25,7 +25,6 @@
 *  International Registered Trademark & Property of PrestaShop SA
 */
 
-define('_PS_MODE_DEV_', true);
 define('_PS_DEBUG_PROFILING_', false);
 define('_PS_MODE_DEMO_', false);