public function open($pdfFile)
    {
        $this->file = $pdfFile;
        $this->setOutputDirectory(dirname($pdfFile));

        return $this;
    }
public function open($pdfFile)
    {
        $this->file = $pdfFile;
        $this->setOutputDirectory(dirname($pdfFile));

        return $this;
    }
public function open ( $ pdfFile ) { $ this -> file = $ pdfFile ; $ this -> setOutputDirectory ( dirname ( $ pdfFile ) ) ; return $ this ; }
open pdf file that will be converted. make sure it is exists

@param string $pdfFile path to pdf file

@return $this current object
open pdf file that will be converted . make sure it is exists