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run code in 300+ PHP versions simultaneously
<?php $array[something] = "Something is not a string. It's a constant. But because it's not found, PHP will assume you meant a string."; //And if you error reporting is off, you'll never know.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Undefined constant "something" in /in/0CXk3:3 Stack trace: #0 {main} thrown in /in/0CXk3 on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant something - assumed 'something' (this will throw an Error in a future version of PHP) in /in/0CXk3 on line 3
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant something - assumed 'something' in /in/0CXk3 on line 3
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/0CXk3 on line 5
Process exited with code 255.
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212.64 ms | 401 KiB | 357 Q