--TEST-- prev - ensure we cannot pass a temporary --FILE-- <?php /* Prototype : mixed prev(array $array_arg) * Description: Move array argument's internal pointer to the previous element and return it * Source code: ext/standard/array.c */ /* * Pass temporary variables to prev() to test behaviour */ var_dump(prev(array(1, 2))); ?> --EXPECTF-- Fatal error: Only variables can be passed by reference in %s on line %d