3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_start(); session_decode('a|s:1:”a”;b|s:1:”b”;'); var_dump($_SESSION);
Output for 5.5.29 - 5.5.38, 5.6.13 - 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
Warning: session_decode(): Failed to decode session object. Session has been destroyed in /in/aWVXI on line 3 array(0) { }
Output for 5.5.0 - 5.5.28, 5.6.0 - 5.6.12
array(2) { ["a"]=> NULL ["s:1:”a”;b"]=> NULL }

preferences:
279.43 ms | 402 KiB | 329 Q