3v4l.org

run code in 300+ PHP versions simultaneously
<?php $name = 'mickmackusa'; $dob = fn(?int $age): ?int => !$age ? null : ( fn($newAge) => (print "$name's age is $newAge\n") ? $newAge : null )(2021 - $age); var_export($dob(null)); echo "\n---\n"; var_export($dob(31));
Output for git.master, git.master_jit, rfc.property-hooks
NULL --- mickmackusa's age is 1990 1990

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
83.49 ms | 405 KiB | 5 Q