vertical_to_horizontal_array.php

vertical_to_horizontal_array.php

<?php

$flat = [ 'this', 'seems', 'a', 'bit', 'strange'];
$nested = [];

function v2h_array(&$flat, &$nested) {
    $nested[$flat[0]] = [];
    while (count($flat) > 1) {
        v2h_array(array_splice($flat, 1, count($flat)-1), $nested[$flat[0]]);
    }
    return false;
}

v2h_array($flat, $nested);

var_dump($nested);