Fatal error: Uncaught ValueError: array_rand(): Argument #1 ($array) must not be empty in /home/store/fhs55091/webspace/memory-game/setup.php:51 Stack trace: #0 /home/store/fhs55091/webspace/memory-game/setup.php(51): array_rand() #1 /home/store/fhs55091/webspace/memory-game/setup.php(69): pick_questions() #2 {main} thrown in /home/store/fhs55091/webspace/memory-game/setup.php on line 51