3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [ [ 'days' => [ 'day_id' => '2016-11-23,2016-11-24', ], ], [ 'days' => [ 'day_id' => '2016-11-25,', ], ], [ 'days' => [ 'day_id' => '', ], ], [ 'days' => [ 'day_id' => '2016-11-27,2016-11-28', ], ], ]; function reduce_func($carry, $item){ if (isset($item['days']) && !empty($item['days']['day_id'])){ $carry += count(array_unique(array_filter(explode(',', $item['days']['day_id'])))); } return $carry; } $result = array_reduce($arr, "reduce_func", 0); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
int(5)

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:
45.67 ms | 401 KiB | 8 Q