How Can I Edit PDFs in PHP, Specifically Replacing Text?

How to Edit PDFs in PHP?

When it comes to editing PDF documents in PHP, there are several approaches you can consider. Open-source and zero-license cost options are available to help you seamlessly modify PDF files.

Replacing Text in PDFs

To replace text in a PDF, you can adopt a "fill in the blank" approach. This involves positioning new text precisely on the page, making it easy to add missing information. Using the Zend Framework, you can achieve this with the following code:

require_once 'Zend/Pdf.php';

$pdf = Zend_Pdf::load('blank.pdf');
$page = $pdf->pages[0];
$font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA);
$page->setFont($font, 12);
$page->drawText('Hello world!', 72, 720);
$pdf->save('zend.pdf');

Replacing Inline Content

Replacing inline content, like "[placeholder string]," is more complex. It requires modifying the underlying drawing primitives of the PDF. This can lead to potential layout issues. To avoid these complications, it's generally recommended to use the "fill in the blank" approach for text replacement.

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