Filter and reindex all rows of a 2d array

This is the original array:

[radios1] => Array
    (
        [0] => on
    )

[from] => Array
    (
        [0] => 
        [1] => Bangalore
        [2] => 
        [3] => 
    )

And I want to remove the empty elements of each row so I used this code to do so:

$array = array_map('array_filter', $_POST);
$array = array_filter($array);

And the output of this is as follows

[radios1] => Array
    (
        [0] => on
    )

[from] => Array
    (
        [1] => Bangalore
    )

Here I have been able to remove the keys with empty values but the filtered keys should be reindexed. I have used both array_merge() and array_values(), but there is no use. I am getting the same output; I want the output as:

[radios1] => Array
    (
        [0] => on
    )

[from] => Array
    (
        [0] => Bangalore
    )

I would use array_walk and then array_filter then array_values to reset the index.

For example:

<?php
$array = [
    'radios1' => [
        'on'
    ],
    'from' => [
        '',
        'Bangalore',
        '',
        '',
    ]
];

array_walk($array, function (&$value, $key) {
    $value = array_values(array_filter($value));
});

print_r($array);

https://3v4l.org/Km1i8

Result:

Array
(
    [radios1] => Array
        (
            [0] => on
        )

    [from] => Array
        (
            [0] => Bangalore
        )

)