Associative transpose array 201701210024001

<?php
$siswa = array
(
    array (
    'nama' => 'joko',
    'kelas' => '3smp',
    'hobi' => 'melukis'
    ),
    array (
    'nama' => 'jokosableng',
    'kelas' => '3smp',
    'hobi' => 'menggambar'
    )
);
function array_trans_assoc($arr) {
    $out = array();
    foreach ($arr as $key => $sub_arr) {
        foreach ($sub_arr as $subkey => $subvalue) {
            $out[$subkey][$key] = $subvalue;
        }
    }
    return $out;
}
echo "<pre>";
print_r(array_trans_assoc($siswa));
/*---- RESULT:
Array
(
    [nama] => Array
        (
            [0] => joko
            [1] => jokosableng
        )

    [kelas] => Array
        (
            [0] => 3smp
            [1] => 3smp
        )

    [hobi] => Array
        (
            [0] => melukis
            [1] => menggambar
        )
*/