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 = clone $st->q; unset($kl->k); print_r($st); print_r($kl);
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
stdClass Object ( [q] => stdClass Object ( [k] => 1 [w] => 2 ) ) stdClass Object ( [w] => 2 )
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_VARIABLE in /in/8tfYj on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_VARIABLE in /in/8tfYj on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/8tfYj on line 8
Process exited with code 255.

preferences:
237.81 ms | 401 KiB | 309 Q