3v4l.org

run code in 300+ PHP versions simultaneously
<?php $st = new stdClass(); $st->q = new stdClass(); $st->q->k = 1; $st->q->w = 2; $kl = $st->q; unset($kl->k); print_r($st); print_r($kl);

preferences:
44.18 ms | 402 KiB | 5 Q