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run code in 300+ PHP versions simultaneously
<?php fopen("/etc/passwd\x00","r");
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught ValueError: fopen(): Argument #1 ($filename) must not contain any null bytes in /in/GUpop:2 Stack trace: #0 /in/GUpop(2): fopen('/etc/passwd\x00', 'r') #1 {main} thrown in /in/GUpop on line 2
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.31, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: fopen() expects parameter 1 to be a valid path, string given in /in/GUpop on line 2
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29

preferences:
271.61 ms | 402 KiB | 436 Q