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run code in 300+ PHP versions simultaneously
<?php if (ini_get('session.auto_start')) { session_destroy(); } ini_set('session.serialize_handler', 'php_serialize'); session_start(); $_SESSION['ryat'] = '|O:8:"stdClass":0:{}'; var_dump($_SESSION);
Output for 5.5.4 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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
array(1) { ["ryat"]=> string(20) "|O:8:"stdClass":0:{}" }
Output for 5.5.0 - 5.5.3
Warning: ini_set(): Cannot find serialization handler 'php_serialize' in /in/ZHFtO on line 6 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/ZHFtO:6) in /in/ZHFtO on line 7 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/ZHFtO:6) in /in/ZHFtO on line 7 array(1) { ["ryat"]=> string(20) "|O:8:"stdClass":0:{}" }

preferences:
246.81 ms | 402 KiB | 292 Q