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run code in 300+ PHP versions simultaneously
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Output for 7.4.0 - 7.4.28, 7.4.30 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.1, 8.1.3 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.20, 8.4.1 - 8.4.6
array ( 3 => 3, 2 => 2, 1 => 1, 6 => 6, 5 => 5, )
Output for 7.4.29, 8.1.2

Process exited with code 137.
Output for 5.3.14
Parse error: syntax error, unexpected '[' in /in/FmsUL on line 3
Process exited with code 255.
preferences:
82.9 ms | 412 KiB | 5 Q