3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { private $foo = 'bar'; } class B extends A { public function setFoo() { return $this->{chr(0) . 'A' . chr(0) . 'foo'} = 'stuff'; } } $b = new B(); $b->setFoo(); var_dump($b);

preferences:
45.32 ms | 402 KiB | 5 Q