Fatal error: Uncaught TypeError: array_map(): Argument #2 ($array) must be of type array, null given in /var/www/html/config.php:16 Stack trace: #0 /var/www/html/config.php(16): array_map() #1 /var/www/html/check-cart.php(17): checkSeats() #2 {main} thrown in /var/www/html/config.php on line 16