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<?php function restructureArray3($array, $x) { while ($x) $return [] = implode(', ', array_splice($array, 0, ceil(sizeof($array) / $x--))); return $return; } $array = range(1, 7); $x = 3; var_dump(restructureArray3($array, $x));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(3) { [0]=> string(7) "1, 2, 3" [1]=> string(4) "4, 5" [2]=> string(4) "6, 7" }

preferences:
269.57 ms | 405 KiB | 344 Q