3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = false; (function () use ($x) { $x = true; })(); var_dump( $x );
Output for 7.0.0 - 7.0.24, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.22, 8.1.0 - 8.1.9
bool(false)

preferences:
16.6 ms | 410 KiB | 5 Q