3v4l.org

run code in 300+ PHP versions simultaneously
<?php $Foo = call_user_func(function() { $a = function() { return 'hello'; }; $b = function() { return 'world'; }; return (object)array( 'a' => $a, 'b' => $b, ); }); echo implode(' ', array($Foo->a->__invoke(), $Foo->b->__invoke()));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
hello world
preferences:
240.18 ms | 404 KiB | 376 Q