[feature/twig] Add a comment to tpl output if PHP used, but disabled

PHPBB3-11598

phpBB/includes/template/twig/node/php.php

@@ -28,13 +28,17 @@ class phpbb_template_twig_node_php extends Twig_Node
     {
         $compiler->addDebugInfo($this);
 
-		$config = $this->environment->get_phpbb_config();
+		if (!$config['tpl_allow_php'])
-
-		if ($config['tpl_allow_php'])
 		{
+			$compiler
+				->write("// PHP Disabled\n")
+			;
+
+			return;
+		}
+
 		$compiler
 			->raw($this->getNode('text')->getAttribute('data'))
 		;
     }
 }
-}