3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['session.serialize_handler'=>'wddx']; session_start($arr);
Output for 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_start(): Setting option "session.serialize_handler" failed in /in/3qAgc on line 4 Warning: session_start(): Session cookie cannot be sent after headers have already been sent (output started at /in/3qAgc:4) in /in/3qAgc on line 4 Warning: session_start(): Session cache limiter cannot be sent after headers have already been sent (output started at /in/3qAgc:4) in /in/3qAgc on line 4
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: session_start(): Setting option 'session.serialize_handler' failed in /in/3qAgc on line 4 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/3qAgc:4) in /in/3qAgc on line 4 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/3qAgc:4) in /in/3qAgc on line 4
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28

preferences:
199.89 ms | 402 KiB | 241 Q