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run code in 300+ PHP versions simultaneously
<?php /** * the deref function */ function ​($mixed) { return $mixed; } class foo { function bar($subj) { var_dump($subj); } } ​(new foo())->bar($foo);
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
Warning: Undefined variable $foo in /in/57alQ on line 15 NULL
Output for 5.0.4 - 5.0.5, 5.1.0 - 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 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: foo in /in/57alQ on line 15 NULL
Output for 7.3.32 - 7.3.33
NULL
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: foo in /in/57alQ on line 15 NULL
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/57alQ on line 15
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
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/57alQ on line 15
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/57alQ on line 15
Process exited with code 255.

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