How to generate a multiple documents by mpdf library?

Question

I've been trying to generate a multiple pdfs. How can I do it?

I have tried to use a for loop, but I have no idea how to continue.

for ($i = 0; $i < 10; $i++) {
    $mpdf = new mPDF();
    $mpdf->WriteHTML('<p>Only test$i</p>');
    $mpdf->Output("Document_name$i.pdf", "D");
}

exit;    

I expect 10 documents that will be downloaded by this script.

Answer 1

While HTTP technically does support multiple files in a single response through MIME-Multipart, browser support is mostly non-existent.

A possible course of action would be to add each generated PDF to a ZIP archive, and serve the ZIP file as the response instead:

    $zip = new ZipArchive();
    $zipFile = tempnam('/tmp', 'zip');
    $zip->open($zipFile, ZipArchive::CREATE);

    for ($i = 0; $i < 10; $i++) {
        $mpdf = new mPDF();
        $mpdf->WriteHTML('<p>Only test$i</p>');
        $pdfData = $mpdf->Output("", \Mpdf\Output\Destination::STRING_RETURN);
        $zip->addFromString("Document_name{$i}.pdf", $pdfData);
    }

    $zip->close();

    header("Content-type: application/zip");
    header('Content-Disposition: attachment; filename=Documents.zip'); 
    readfile($zipFile);

    unlink($zipFile);
    exit;