SVG Canvas editor integration

I have a CodeIgniter based application which needs an SVG editor integrated. You can re-use code like: [login to view URL] or [login to view URL] or anything you're comfortable with. The important thing to bear in mind is that the requirement is to be able to: 1) Integrate the call to the editor from the current web application 2) What we want is to store the individual edits as information in a table (a PHP REST endpoint for this can be developed) 3) The output is generated as and when the user wants it and authorizes it 4) The ability to link to other IDs in the existing system