How to remove spaces in array keys names in php?

Question

I am trying to remove all spaces in array keys names i.e. str_replace(\' \',\'\',$value) (or worst cast scenario replace them with underscores (_) )

and I am trying

Answer 1

This will help:

function fixArrayKey(&$arr)
{
    $arr = array_combine(
        array_map(
            function ($str) {
                return str_replace(" ", "_", $str);
            },
            array_keys($arr)
        ),
        array_values($arr)
    );

    foreach ($arr as $key => $val) {
        if (is_array($val)) {
            fixArrayKey($arr[$key]);
        }
    }
}

Tested as below:

$data = array (
    "key 1" => "abc",
    "key 2" => array ("sub 1" => "abc", "sub 2" => "def"),
    "key 3" => "ghi"
);
print_r($data);
fixArrayKey($data);
print_r($data);

Input:

Array
(
    [key 1] => abc
    [key 2] => Array
        (
            [sub 1] => abc
            [sub 2] => def
        )

    [key 3] => ghi
)

Output:

Array
(
    [key_1] => abc
    [key_2] => Array
        (
            [sub_1] => abc
            [sub_2] => def
        )

    [key_3] => ghi
)