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@ 2020-08-16T11:16:05Z

<?php

var_export(
    array2cols(range('a', 'r'), 12)
);

function array2cols($array,$n){
    $groups = array();
    for($i=0;$i<$n;$i++){
        $groups[$i] = array();
    }
    $col = 0;
    foreach($array as $row){
        $groups[$col][] = $row;
        $col = ($col+1)%$n;
    }
    return $groups;
}

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
range: documentation ( source)

preferences:dark modelive preview

58.24 ms | 402 KiB | 5 Q