3v4l.org

run code in 300+ PHP versions simultaneously
<?php function firstDayOfWeek($date) { $day = DateTime::createFromFormat('d-m-Y', $date); $day->setISODate((int)$day->format('o'), (int)$day->format('W'), 1); return $day->format('d-m-Y'); } var_dump(firstDayOfWeek('10-07-2017'));
Output for git.master, git.master_jit, rfc.property-hooks
string(10) "10-07-2017"

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:
38.51 ms | 401 KiB | 8 Q