Implement the digital capture of a handwritten signature inside an HTML form for a PHP/MySQL website

I need an open source solution that saves/generates a handwritten signature to/from a MySQL table. The HTML form will include multiple signature instances (e.g. initials by some lines followed up with a final signature line). The signature capture should be responsive, working from a browser on a desktop/laptop/table/mobile device. It would be good if there was a zoom capability for each signature instance. I will provide the successful bidder with root Terminal access to an Ubuntu LAMP server instance, where a very simple HTML form will currently be doing PHP CRUD with a MySQL database. I need you to implement the signature capability into this form. Solutions found easily on Google include: Signature Pad [login to view URL] (look at related [login to view URL]) jSignature: [login to view URL] jQuery UI Signature [login to view URL] You can implement one of these solutions or any other open source solution (jQuery, JSON, Javascript etc) as long as the signature information will be stored in and read from MySQL. The website this will be incorporated into is in PHP, so that would be the preferred server side language. I am looking for responses with a fixed implementation cost.