src/KsUtils/StrFilter/Trim.php
public function filter($str)
    {
        if (is_null($str)) {
            return null;
        }

        if (is_array($str)) {
            foreach ($str as $k => $v) {
                $str[$k] = trim($v);
            }

            return $str;
        }

        return trim($str);
    }
public function filter($str)
    {
        if (is_null($str)) {
            return null;
        }

        if (is_array($str)) {
            foreach ($str as $k => $v) {
                $str[$k] = trim($v);
            }

            return $str;
        }

        return trim($str);
    }
Strips all trailing whitespaces
@param  string|array $str Source string
@return string       Fiiltered string