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run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL & ~E_NOTICE); $foo = array("bar" => "baz", "null" => "void"); print_r($foo[bar]); //this works, as it will assume $foo["bar"] print_r($foo[null]); //null is a defined constant, so it will look for a value with an empty key which is not defined
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
Fatal error: Uncaught Error: Undefined constant "bar" in /in/QW8qV:4 Stack trace: #0 {main} thrown in /in/QW8qV on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant bar - assumed 'bar' (this will throw an Error in a future version of PHP) in /in/QW8qV on line 4 baz
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 - 7.1.25
baz
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/QW8qV on line 5
Process exited with code 255.
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211.44 ms | 409 KiB | 5 Q