3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $list = new SplDoublyLinkedList; $list->push("foo"); $list->push("bar"); var_dump($list->serialize()); var_dump(serialize(array("foo", "bar")));
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
string(26) "i:0;:s:3:"foo";:s:3:"bar";" string(34) "a:2:{i:0;s:3:"foo";i:1;s:3:"bar";}"
Output for hhvm-3.12.0
string(52) "a:2:{i:0;a:2:{i:0;s:3:"foo";i:1;s:3:"bar";}i:1;i:0;}" string(34) "a:2:{i:0;s:3:"foo";i:1;s:3:"bar";}"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.3.29
Fatal error: Call to undefined method SplDoublyLinkedList::serialize() in /in/G3BUY on line 5
Process exited with code 255.
Output for 5.0.0 - 5.2.17
Fatal error: Class 'SplDoublyLinkedList' not found in /in/G3BUY on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: spldoublylinkedlist in /in/G3BUY on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: spldoublylinkedlist in /in/G3BUY on line 2