1.1 misho 1: --TEST-- 2: Bug #20865 (array_key_exists and NULL key) 3: --FILE-- 4: <?php 5: $ta = array(1, 2, 3); 6: $ta[NULL] = "Null Value"; 7: 8: var_dump(array_key_exists(NULL, $ta)); 9: ?> 10: --EXPECT-- 11: bool(true)