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<?php $arr = range('a', 'g'); $size = 7; var_dump( array_chunk( [...$arr, ...array_fill(0, $size-(count($arr)%$size), null)], $size) );
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(2) { [0]=> array(7) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" [4]=> string(1) "e" [5]=> string(1) "f" [6]=> string(1) "g" } [1]=> array(7) { [0]=> NULL [1]=> NULL [2]=> NULL [3]=> NULL [4]=> NULL [5]=> NULL [6]=> NULL } }

preferences:
59.14 ms | 1018 KiB | 4 Q