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run code in 300+ PHP versions simultaneously
<?php session_start(); session_decode('test|s:4:"high|s:1:"a";'); 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 - 8.2.19, 8.3.0 - 8.3.7
Warning: session_decode(): Failed to decode session object. Session has been destroyed in /in/sQYHA on line 4 array(0) { }
Output for 5.5.0 - 5.5.28, 5.6.0 - 5.6.12
array(2) { ["test"]=> NULL [""]=> string(1) "a" }

preferences:
223.74 ms | 402 KiB | 332 Q