是否可以使用PHP在pdf文档中添加签名字段？ 我没有“数字签名”文件。 我只添加一个签名字段。

I have to generate a PDF document and add a "signature field".

A signature field is a field that allow to third party service to digitally sign document.

Is it possible to do this in PHP with an open source solution ?

I saw https://manuals.setasign.com/setapdf-signer-manual/create-a-signature-field/.

I try to use tcpdf but i have no success.

Thanks.