Unable to find PDF file header error

[mennei]

Hi,

When I'm calling a controller that excute this method:
public function downloadZip ($did) {
$decs = DB::table ('app_decisions')->select ()->where ('id', '=', $did)->first ();

	$files = DB::table('apps_file')
		->where([
			['app_id', '=', $decs->p5_id],
		])->get();
	Log::debug(count($files));
	$filespath = public_path ('upload');
	$marge_file = 'file.pdf';
	$pdf = new PDFMerger();
	foreach ($files as $key => $file) {
		if( file_exists($filespath . '/' . $file->url) ){
			if (strpos($file->url, 'docx') || strpos($file->url, 'doc') !== false) {
				//header ("Content-type: application/vnd.ms-word");
				//header ("Content-Disposition: attachment;Filename=document_name.doc");
			} else {
				$pdf->addPDF($filespath . '/' . $file->url, 'all');
			}
		} 
		if (file_exists($filespath . '/admin/' . $file->url)) {
			Log::debug('admin:'. $file->url);
			if (strpos($file->url, 'jpg') || strpos($file->url, 'docx') || strpos($file->url, 'doc') !== false) {
				//header ("Content-type: application/vnd.ms-word");
				//header ("Content-Disposition: attachment;Filename=document_name.doc");
			} else {
				$pdf->addPDF($filespath . '/admin/' . $file->url, 'all');
			}
		}
	}
	$pdf->merge('file', storage_path('app/public').'/'.$marge_file);
	return response ()->download (storage_path('app/public').'/'.$marge_file)->deleteFileAfterSend (true);
}

I'm getting this exception:

(1/1) PdfParserExceptionUnable to find PDF file header.

in PdfParser.php line 131
at PdfParser->resolveFileHeader()in PdfParser.php line 172
at PdfParser->getPdfVersion()in PdfReader.php line 85
at PdfReader->getPdfVersion()in FpdiTrait.php line 215
at Fpdi->setSourceFile('/var/www/vhosts/betshemesh.automas.co.il/httpdocs/public/upload/5f9e6a074f930_1604217351.jpg')in PDFMerger.php line 67
at PDFMerger->merge('file', '/var/www/vhosts/betshemesh.automas.co.il/httpdocs/storage/app/public/file.pdf')in TendersController.php line 1410
at TendersController->downloadZip('357')

Please, guide me how to use PDFMerger with docx or jpg files.

Thanks,
Menachem.