3v4l.org

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<?php echo `strstr("secrets", "secret\x00")`; ?>
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 ValueError: shell_exec(): Argument #1 ($command) must not contain any null bytes in /in/vFFRn:2 Stack trace: #0 /in/vFFRn(2): shell_exec('strstr("secrets...') #1 {main} thrown in /in/vFFRn on line 2
Process exited with code 255.
Output for 7.2.30 - 7.2.33, 7.3.17 - 7.3.33, 7.4.5 - 7.4.33
Warning: shell_exec(): NULL byte detected. Possible attack in /in/vFFRn on line 2
Output for 7.2.29, 7.3.16, 7.4.3 - 7.4.4
Warning: shell_exec(): Unable to execute 'strstr("secrets", "secret' in /in/vFFRn 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 - 5.3.28, 5.4.0 - 5.4.27, 5.4.39 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0
Output for 5.3.29, 5.4.28 - 5.4.38
sh: 1: Syntax error: word unexpected (expecting ")")

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