GUMP::validate_min_numeric PHP Method

    protected function validate_min_numeric($field, $input, $param = null)
    {
        if (!isset($input[$field])) {
            return;
        }
        if (is_numeric($input[$field]) && is_numeric($param) && $input[$field] >= $param) {
            return;
        }
        return array('field' => $field, 'value' => $input[$field], 'rule' => __FUNCTION__, 'param' => $param);
    }