3v4l.org

run code in 300+ PHP versions simultaneously
<?php $values = array('a'=>1, 'b'=>2, 'c'=>3); $revisions = array('b'=>4, 'c'=>5, 'd'=>6); $fees = array(); foreach(array_keys($values + $revisions) as $key){ if(array_key_exists($key, $values) && array_key_exists($key, $revisions)){ $fees[$key] = $values[$key] + $revisions[$key]; } elseif(array_key_exists($key, $values)){ $fees[$key] = $values[$key]; } elseif(array_key_exists($key, $revisions)){ $fees[$key] = $revisions[$key]; } } print_r($fees);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [a] => 1 [b] => 6 [c] => 8 [d] => 6 )

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:
40.39 ms | 401 KiB | 8 Q