Digitally sign PDF documents online in PHP

PDF documents are among the widely used file formats for information sharing. They usually have confidential and legal value, such as a contract. In order to ensure the integrity of files and to avoid any counterfeit, we add digital signatures. It also ensures that a document has not been modified by someone other than its author, and verifies that the author is who we expect and not somebody else.
· Nayyer Shahbaz · 4 min