3v4l.org

run code in 300+ PHP versions simultaneously
<?php $source = [ array_combine(range(1,10), range(1,10)), array_combine(range(11,20), range(11,20)), array_combine(range(21,30), range(21,30)) ]; $return = []; foreach($source as $data) { $return = array_merge($return, $data); } $filter = function ($value, $key) { return ($value < 25); }; $return = array_filter($return, $filter, ARRAY_FILTER_USE_BOTH); var_dump($return);

preferences:
43.81 ms | 402 KiB | 5 Q