Get a subset of an array based on an array of keys

Question

I wrote this function to get a subset of an array. Does php have a built in function for this. I can't find one in the docs. Seems like a waste if I'm reinventing the wheel.

function array_subset($array, $keys) {
    $result = array();
    foreach($keys as $key){
        $result[$key] = $array[$key];
    }
    return $result;
}

Answer 1

array_diff_key and array_intersect_key are probably what you want.