3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = "12345"; $res = []; if (preg_match_all('~(?=((\d)\d?))~', $s, $m, PREG_SET_ORDER)) { $single = []; $double = []; foreach ($m as $v) { if ($v[1] != $v[2]) { array_push($single, $v[2]); array_push($double, $v[1]); } else { array_push($single, $v[1]); } } $res = array_merge($single, $double); print_r( $res ); }
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 12 [6] => 23 [7] => 34 [8] => 45 )

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:
72.32 ms | 401 KiB | 8 Q