3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 123; $bar = 456; list($foo, $bar) = [$bar, $foo]; var_dump($foo, $bar);
Output for 5.6.0 - 5.6.25, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
int(456) int(123)
preferences:
213.36 ms | 403 KiB | 200 Q