3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dow = 0; $weekday = (new DateTime('Sunday')) ->add(new DateInterval('P' . $dow . 'D')); echo $dow . ' = ' . $weekday->format('l'); echo PHP_EOL . PHP_EOL; $dowISO = 7; $weekdayISO = (new DateTime('Sunday')) ->add(new DateInterval('P' . $dow . 'D')); echo $dowISO . ' = ' . $weekdayISO->format('l');
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.4, 8.3.6 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
0 = Sunday 7 = Sunday
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 0 = Sunday 7 = Sunday
preferences:
82.7 ms | 1382 KiB | 4 Q