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run code in 300+ PHP versions simultaneously
<?php $user = $_GET[‘user’] ?? ‘nobody’; print $user;
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
Fatal error: Uncaught Error: Undefined constant "‘user’" in /in/MSQmP:3 Stack trace: #0 {main} thrown in /in/MSQmP on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant ‘user’ - assumed '‘user’' (this will throw an Error in a future version of PHP) in /in/MSQmP on line 3 Warning: Use of undefined constant ‘nobody’ - assumed '‘nobody’' (this will throw an Error in a future version of PHP) in /in/MSQmP on line 3 ‘nobody’
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant ‘user’ - assumed '‘user’' in /in/MSQmP on line 3 Notice: Use of undefined constant ‘nobody’ - assumed '‘nobody’' in /in/MSQmP on line 3 ‘nobody’
Output for 5.4.8 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/MSQmP on line 3
Process exited with code 255.

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