public function getVerticalResolution()
    {
        if (!isset($this->data[self::VERTICAL_RESOLUTION])) {
            return false;
        }

        return $this->data[self::VERTICAL_RESOLUTION];
    }
public function getVerticalResolution()
    {
        if (!isset($this->data[self::VERTICAL_RESOLUTION])) {
            return false;
        }

        return $this->data[self::VERTICAL_RESOLUTION];
    }
public function getVerticalResolution ( ) { if ( ! isset ( $ this -> data [ self :: VERTICAL_RESOLUTION ] ) ) { return false ; } return $ this -> data [ self :: VERTICAL_RESOLUTION ] ; }
Returns the vertical resolution in DPI, if it exists

@return int|boolean
Returns the vertical resolution in DPI if it exists