Warning: Undefined variable $isContained in C:\xampp\htdocs\storage\framework\views\ab1b85177720bc8dc016b7ee825860a6.php on line 4

Fatal error: Uncaught Error: Value of type null is not callable in C:\xampp\htdocs\storage\framework\views\ab1b85177720bc8dc016b7ee825860a6.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\storage\framework\views\ab1b85177720bc8dc016b7ee825860a6.php on line 4