if you are facing the following problem. Cant use dump() function in twig files or how to enable debug in opencart twig or print_r alternate use dump() in opencart 3.0 for fixing this problem follow these steps You can activate dump() function for twig environment by following these steps in opencart 3.0 : Go to system/library/template/Twig/Environment.php Here in the constructor function, you can find $options array . Set 'debug' option to 'true' . Now we need to include debug extension, so add $this->addExtension(new Twig_Extension_Debug()); below. Now you can use {{ dump(your_variable_name) }} as print_r variable in php That's all 😅😆😛