Convert columns of a 2d array into rows of a 2d array

Question

I have a array with x array in it with always same keys in these arrays .

Array
(
    [foo] => Array
        (
            [q] => "12r3"
            [w] => "3r45"
            [e] => "67e8"
        )
    [foo1] => Array
        (
            [q] => "féEt"
            [w] => "Ptmf"
            [e] => "4323"
        )
    [foo2] => Array
        (
            [q] => "axa"
            [w] => "dfvd"
            [e] => "hjh"
        )
)

and I need to merge all these arrays in one like:

[foo] => Array
(
     [q] => Array
       (
          [0] => "12r3",
          [1] => "féEt",
          [2] => "axa",
       )
     [w] => Array
       (
          [0] => "3r45",
          [1] => "Ptmf",
          [2] => "dfvd",
       )
    ...

How can I do that?

Thanks.

Answer 1

This should work for you:

(Here I just go through the first array and grab all columns with array_column() from the entire array with the keys from the first array.)

<?php

    $arr = [

        "foo" => [
            "q" => "12r3",
            "w" => "3r45",
            "e" => "67e8"
        ],
        "foo1" => [
            "q" => "féEt",
            "w" => "Ptmf",
            "e" => "4323"
        ],
        "foo2" => [
            "q" => "axa",
            "w" => "dfvd",
            "e" => "hjh"
        ]
    ];


foreach($arr["foo"] as $k => $v) {
    $results[$k] = array_column($arr, $k);
}

print_r($results);

?>

Output:

Array
(
    [q] => Array
        (
            [0] => 12r3
            [1] => féEt
            [2] => axa
        )

    [w] => Array
        (
            [0] => 3r45
            [1] => Ptmf
            [2] => dfvd
        )

    [e] => Array
        (
            [0] => 67e8
            [1] => 4323
            [2] => hjh
        )

)