3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C{ private $wtf="lol"; function f(){ $inherited="inherited"; $uninherited="uninherited"; // "php lambads does not inherit variables automatically" // thus to inerhit $inherited , we need use(&$inherited) call_user_func(function()use(&$inherited){ var_dump($this->wtf); var_dump($inherited); var_dump($uninherited); }); } } (new C())->f();

preferences:
57.87 ms | 402 KiB | 5 Q