3v4l.org

run code in 300+ PHP versions simultaneously
<?php $requests = [-11, -1, 0, 1, 2]; foreach ($requests as $request) { $d = new DateTime('first day of this month'); $d->modify("$request month"); echo $d->format('Y') . ' & ' . $d->format('n') . "\n"; }
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.26, 8.4.1 - 8.4.13
2020 & 12 2021 & 10 2021 & 11 2021 & 12 2022 & 1
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 2020 & 12 2021 & 10 2021 & 11 2021 & 12 2022 & 1
preferences:
139.44 ms | 407 KiB | 5 Q