3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(&$obj) { return $obj; } $o = new StdClass; $foo = 'foo'; $foo($o);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.26, 8.0.0 - 8.0.13, 8.1rc1 - rc3

preferences:
34.31 ms | 459 KiB | 5 Q