<?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