run code in 300+ PHP versions simultaneously
<?php class ParentClass { function foo(string $arg): string {} } class ChildClass extends ParentClass { // typehints are missing function foo($arg) {} }

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)

29.76 ms | 406 KiB | 5 Q