Dear ones, I made a non Moodle site in php with a course. Now I would like to add to this site the possibility that students who authenticate themselves on my course on Moodle can access without having to make a further login also on the external site. In a nutshell I would like a student to click on a button or link in the course on Moodle to be authenticated on the external site. I read that with Moodle it can be done using LTI but it is not clear to me how. In my site on Moodle it was easy to insert and configure the external tool but I don't know what I have to add to my site outside Moodle to receive the student data for authentication.

I also know that LTI is not the easiest method but it is the method that the IT expert would like me to use (it would be easier with a webservice).

Is there an example (better if done in php) that implements LTI authentication on the provider site?

In case there isn't an example where can I find documentation? I tried to explore the IMS site but got lost without finding anything.

Thanks in advance for any suggestions.