How to modify an existing pdf file using php?

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Vladislav2016-09-21 10:21:45

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Vladislav, 2016-09-21 10:21:45

I use the mPDF library to generate pdf files. Everything was fine, but a new task appeared: modifying an existing pdf file. As far as I understand, mPDF doesn't do that.
Q: Is it possible to modify an existing pdf file using php? And if so, how to do it?

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Hihimor, 2016-09-21
@Hihimor

You can use FPDF. It is free and allows you to modify PDF documents.
Only he is not friendly with compressed PDF files (pdf version> 1.4). But you can install GhostScript and use it to downgrade the version of the document.