After some searching how I could digital sign a PDF document with PHP I couldn't really find a working solution. Does anybody know how to do this? Or do you know a third-party service which can sign PDF's for us?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
问题:
回答1:
Setasign appears to offer a commercial solution for signing PDFs already created - http://www.setasign.de/products/pdf-php-solutions/setapdf-signer/sign-pdf.php
Alternatively, TCPDF (Google it, it won't let me post a second URL), allows you to generate signed PDFs on the fly.
