3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $items=array(); for ($j=1;$j<=2;$j++) { for ($i=0;$i<4*$j;$i++) { $item=&$items[$i]; if (!isset($item)) $item=$j."_".$i."x"; $item=$item.="x"; } } print_r($items); foreach ($items as $item) echo $item."\n"; print_r($items);
Output for 4.3.0 - 7.1.0
Array ( [0] => 1_0xxx [1] => 1_1xxx [2] => 1_2xxx [3] => 1_3xxx [4] => 2_4xx [5] => 2_5xx [6] => 2_6xx [7] => 2_7xx ) 1_0xxx 1_1xxx 1_2xxx 1_3xxx 2_4xx 2_5xx 2_6xx 2_6xx Array ( [0] => 1_0xxx [1] => 1_1xxx [2] => 1_2xxx [3] => 1_3xxx [4] => 2_4xx [5] => 2_5xx [6] => 2_6xx [7] => 2_6xx )