Save Changes to PDF Documents

There are two methods that save changes to PDF documents: the ZendPdf\PdfDocument::save() and ZendPdf\PdfDocument::render() methods.

ZendPdf\PdfDocument::save($filename, $updateOnly = false) saves the PDF document to a file. If $updateOnly is TRUE, then only the new PDF file segment is appended to a file. Otherwise, the file is overwritten.

ZendPdf\PdfDocument::render($newSegmentOnly = false) returns the PDF document as a string. If $newSegmentOnly is TRUE, then only the new PDF file segment is returned.

Saving PDF Documents

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// Load the PDF document
$pdf = ZendPdf\PdfDocument::load($fileName);
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// Update the PDF document
$pdf->save($fileName, true);
// Save document as a new file
$pdf->save($newFileName);

// Return the PDF document as a string
$pdfString = $pdf->render();

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