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run code in 300+ PHP versions simultaneously
<?php if (version_compare(PHP_VERSION, '7.0.0-dev') < 0) { assert_options(ASSERT_CALLBACK, function($file, $line, $code, $message = '') { print_r(array($message)); }); } assert(FALSE, 'Hi');
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 AssertionError: Hi in /in/r46HP:9 Stack trace: #0 /in/r46HP(9): assert(false, 'Hi') #1 {main} thrown in /in/r46HP on line 9
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: assert(): Hi failed in /in/r46HP on line 9
Output for 5.4.8 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Array ( [0] => Hi ) Warning: assert(): Hi failed in /in/r46HP on line 9
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.7
Warning: assert() expects exactly 1 parameter, 2 given in /in/r46HP on line 9
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/r46HP on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/r46HP on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/r46HP on line 4
Process exited with code 255.

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