删除至少没有一个值的数组键

i have multidimensional array..in this array i have many arrays..i want to filter their keys..to do that i want to remove the keys that has not any value in all arrays..so how to do this in the right way

        $cell_values = array_map('array_filter', $values);
print_r($cell_values);

this will filter them all but i want to let the key if it have any value in another array..

arrays like thts

    Array
    (
        [2] => Array
            (
                [A] => 1010
                [B] => -6989548.4
                [C] => 
                [D] => 
            )

        [3] => Array
            (
                [A] => 1020
                [B] => 20554
                [C] => 28.8
                [D] => 
            )

        [4] => Array
            (
                [A] => 1030
                [B] => 15151
                [C] => 
                [D] => 
            )

the expected output like this

    Array
    (
        [2] => Array
            (
                [A] => 1010
                [B] => -6989548.4
                [C] => 
            )

        [3] => Array
            (
                [A] => 1020
                [B] => 20554
                [C] => 28.8

            )

        [4] => Array
            (
                [A] => 1030
                [B] => 15151
                 [C] => 28.8

            )

First figure out which keys have at least 1 value. Then loop through the array and unset any keys that do not have at least 1 value.

$keys_with_values = array();

foreach($arrays as $array) {
    foreach($array as $key => $value) {
        if($value) {
            $keys_with_values[$key] = 1;
        }
    }
}

foreach($arrays as &$array) {
    foreach($array as $key => $value) {
        if(!isset($keys_with_values[$key]))
            unset($array[$key]);
    }
}