Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /homepages/43/d838431116/htdocs/demo/index.php:29 Stack trace: #0 /homepages/43/d838431116/htdocs/demo/index.php(29): in_array() #1 {main} thrown in /homepages/43/d838431116/htdocs/demo/index.php on line 29