1--TEST-- 2SPL: DoublyLinkedList: Iterator 3--FILE-- 4<?php 5$a = new SplDoublyLinkedList(); 6$a->push(1); 7$a->push(2); 8$a->push(3); 9 10$a->rewind(); 11while ($a->valid()) { 12 var_dump($a->current(), $a->next()); 13} 14?> 15===DONE=== 16<?php exit(0); ?> 17--EXPECTF-- 18int(1) 19NULL 20int(2) 21NULL 22int(3) 23NULL 24===DONE=== 25