3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php interface proxy {} class finalfoo { public function __construct() { if (is_subclass_of($this, __CLASS__, false)) { throw new \Exception('Nein! Class is final!'); } } } class fooproxy extends finalfoo implements proxy { } class naughtyfoo { } new finalfoo; new fooproxy; new naughtyfoo;