--TEST-- SPL SplDoublyLinkedList offsetExists displays warning and returns null on no parameters --CREDITS-- PHPNW TestFest 2009 - Ben Longden --FILE-- offsetExists(); if(is_null($a)) { echo 'PASS'; } ?> --EXPECTF-- Warning: SplDoublyLinkedList::offsetExists() expects exactly 1 parameter, 0 given in %s on line %d PASS