I was trying to merge some PDF on Laravel 10. If there are any other type of file i am converting them into PDF and mergeing . Sometime for some PDF i got this kind of error .

This PDF document probably uses a compression technique which is not supported by the free parser shipped with FPDI. (See https://www.setasign.com/fpdi-pdf-parser for more details)

is there any way to solve this ?

It was my function to merge PDF.

function mergePDFs(array $pdfPaths, $fileName, $fullPublicPath = false)
    {
        if ( count($pdfPaths) <= 0 ) return null;

        ini_set('memory_limit', '-1');
        ini_set('max_execution_time', 900);

        $pdfTempFiles = [];
        $oMerger = PDFMerger::init();

        try {
            foreach ($pdfPaths as $pdfPath) {
                $tempPath = 'uploads/temp/' . IlluminateSupportStr::uuid().'.pdf';

                $extension = getExtension($pdfPath);

                $pdfPath = public_path(substring($pdfPath, "uploads"));

                if ( $extension == 'pdf' ) {
                    $oMerger->addPDF($pdfPath, 'all');
                    continue;
                }

                if ( isDocType($pdfPath) ){
                    if ( $extension == 'xlsx' || $extension == 'xls' ){
                        $path = xlsToPDF($pdfPath, $tempPath);
                        $oMerger->addPDF($path, 'all');
                        $pdfTempFiles[] = $path;
                    } else {
                        if ( $extension == 'doc' ){
                            $newPath = public_path('uploads/temp/' . IlluminateSupportStr::uuid().'.docx');
                            $pdfPath = docToDocx($pdfPath, $newPath);
                            $pdfTempFiles[] = $newPath;
                        }

                        $path = docxToPDF($pdfPath, $tempPath);
                        $oMerger->addPDF($path, 'all');
                        $pdfTempFiles[] = $path;
                    }
                } else {
                    if ( $extension == 'jpeg' || $extension == 'jpg' || $extension == 'png' ){
                        $path = imageToPDF($pdfPath, $tempPath);
                        $oMerger->addPDF($path, 'all');
                        $pdfTempFiles[] = $path;
                    } elseif ( $extension == 'webp' ){
                        $path = convertWebpToPdf($pdfPath, $fileName);
                        $oMerger->addPDF($path, 'all');
                        $pdfTempFiles[] = $path;
                    } elseif ( $extension == 'bmp' ){
                        $path = convertBmpToPdf($pdfPath, $fileName);
                        $oMerger->addPDF($path, 'all');
                        $pdfTempFiles[] = $path;
                    }
                }
            }

            $oMerger->merge();
            $oMerger->save($fileName);
        } catch (Exception $e) {
            throw new Exception();
        }

        foreach ($pdfTempFiles as $pdfTempFile) {
            unlink($pdfTempFile);
        }

        return ($fullPublicPath) ? $fileName : url(substring($fileName, 'uploads'));
    }