How can I read a PPTX file using PHPPresentation ?

[biswa34]

@Progi1984
I am getting this after trying to read from a .pptx. Actually I want to show pptx on browser. But this gives me this weird output. Here is my code:

 $inputFileName = public_path('asset/docs/filename.pptx');

        /** Load $inputFileName to a Spreadsheet Object  **/

        $ppt = \PhpOffice\PhpPresentation\IOFactory::load($inputFileName);
        $writer = \PhpOffice\PhpPresentation\IOFactory::createWriter($ppt, 'PowerPoint2007');
        $message = $writer->save('php://output');

Kindly help ASAP !!