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phpcakephppdfmergepage-numbering

PHP Insert multiple PDF's into PDF on specific page number

My problem is - A user can upload a PDF-File and now I want to add other (between 1 and n) single page PDF's after every Page of the user uploaded PDF.

For example a user uploads a PDF with 4 Pages and I have got 3 single page PDF's on my Webserver that I want to merge with the user PDF. The resulting PDF should then look like this:

Page 1: Page #1 from User uploaded PDF

Page 2: First Single-Page-PDF from Webserver

Page 3: Page #2 from User uploaded PDF

Page 4: Second Single-Page-PDF from Webserver

Page 5: Page #3 from User uploaded PDF

Page 6: Third Single-Page-PDF from Webserver

Page 7: Page #4 from User uploaded PDF

Page 8: First Single-Page-PDF from Webserver

So far I've tried it with PDFMerger

$pdf = new PDFMerger;

$pdf->addPDF('samplepdfs/userpdf.pdf', 'all')
    ->addPDF('samplepdfs/one.pdf', 'all')
    ->addPDF('samplepdfs/two.pdf', 'all')
    ->addPDF('samplepdfs/three.pdf', 'all')
    ->merge('file', 'xxx/result.pdf');

but this only adds the other PDF's at the end.. Is there a solution in PHP where I can specify the number of the page where the other PDF's shall be inserted?

Solution

  • You should avoid using the PDFMerger class. It is almost 6 (!!!) years old! You can do the same with FPDI without much effort. Anyhow you should insert the pages in the order you want them to appear. So I guess it's more a logic problem. From what you'd written in your question I assume that you want to import a whole document while spreading another document with 3 pages between the imported pages. So a simple POC could look like this:

    <?php

require_once("libs/fpdf/fpdf.php");
require_once("libs/fpdi/fpdi.php");

$pdf = new FPDI();

// let's prepare the static "filler pages"
$staticIds = array();
$pageCount = $pdf->setSourceFile('pdf/on/the/webserver.pdf');
for ($pageNumber = 1; $pageNumber <= $pageCount; $pageNumber++) {
    $staticIds[$pageNumber] = $pdf->importPage($pageNumber);
}

// get the page count of the uploaded file
$pageCount = $pdf->setSourceFile('the/uploaded.pdf');
// let's track the page number for the filler page
$fillerPageCount = 1;
// import the uploaded document page by page
for ($pageNumber = 1; $pageNumber <= $pageCount; $pageNumber++) {
    $tplId = $pdf->importPage($pageNumber);
    $pdf->AddPage();
    $pdf->useTemplate($tplId, null, null, 0, 0, true);

    // add the current filler page
    $pdf->AddPage();
    $pdf->useTemplate($staticIds[$fillerPageCount], null, null, 0, 0, true);

    // update the filler page number or reset it
    $fillerPageCount++;
    if ($fillerPageCount > count($staticIds)) {
        $fillerPageCount = 1;
    }
}

// done
$pdf->Output('xxx/result.pdf', 'F');