Add new content to existing PDF documents with PHP

SetaPDF-Stamper

Add new content to existing PDF documents with PHP

Stamp already encrypted and protected PDF documents

Sometimes it is neccesary to encrypt PDF documents to prevent changes or extracting content of them. As encryption is a high performance task the SetaPDF-Stamper component offers the facility to stamp already encrypted documents without re-encrypting the whole document but just the new content. Which leads into a performance boost when delivering stamped and encrypted documents.

This solution is perfect if the offered PDF documents were not encrypted with a user password (the password that is needed to open the document) but the encryption "just" restricts features like copy&paste.

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