3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = new stdClass(); $a->b = 1; $a->c = 2; $d = 3; echo serialize(array($a,array($d, 4)));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 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 - 7.1.33, 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
a:2:{i:0;O:8:"stdClass":2:{s:1:"b";i:1;s:1:"c";i:2;}i:1;a:2:{i:0;i:3;i:1;i:4;}}

preferences:
251.69 ms | 406 KiB | 459 Q