public function boundary()
    {
        if ($this->_boundary) {
            return $this->_boundary;
        }
        $this->_boundary = md5(uniqid(time()));

        return $this->_boundary;
    }
public function boundary()
    {
        if ($this->_boundary) {
            return $this->_boundary;
        }
        $this->_boundary = md5(uniqid(time()));

        return $this->_boundary;
    }
public function boundary ( ) { if ( $ this -> _boundary ) { return $ this -> _boundary ; } $ this -> _boundary = md5 ( uniqid ( time ( ) ) ) ; return $ this -> _boundary ; }
Get the boundary marker

@return string
Get the boundary marker