3v4l.org

run code in 300+ PHP versions simultaneously
<?php $list = new SplDoublyLinkedList(); $list->push(1); $list->push(2); foreach($list as $a) { foreach($list as $b) { echo "($a, $b)"; } }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
(1, 1)(1, 2)(2, 1)(2, 2)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Fatal error: Class 'SplDoublyLinkedList' not found in /in/2PIID on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Cannot instantiate non-existent class: spldoublylinkedlist in /in/2PIID on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: spldoublylinkedlist in /in/2PIID on line 3

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202.62 ms | 401 KiB | 315 Q