3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dll = new SplDoublyLinkedList(); $dll->push(2); $dll->push(3); $dll->unshift(5); $dll->rewind(); while($dll->valid()){ echo $dll->current().'<br />'; $dll->next();//switch to next list item }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.32, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
5<br />2<br />3<br />
preferences:
240.47 ms | 404 KiB | 397 Q