How to remove blank array from an array?

How to remove blank array  from an array?
like: you have an array where a key is blank and you want to remove the array from the tree of array

then you can use this function like:

function unsetblankarray($array)
    {
        foreach($array as $key=>$value)
        {
            if(!@$array[$key]['field'])
            {
                unset($array[$key]);
            }

        }
        return $array;
}