modification in Moodle logs

[atomsk]

hello

 

I'm playing with moodle the last couple of days. (Moodle is an open source CMS project for those who don't know.) I would like to make a minor modification at the admin logs. I want to display the total time a user spent in the system since he was register and for each session separately. I found the variables at http://xref.moodle.org/nav.html?index.html and the function that converts the timestamps. (the login and logout time is stored as seconds since 1/1/70).

 

I'm thinking that I'll have to get those variables from the mdl_user table where they're stored, make my calculations and then pass the result to the  conversion function so I can convert and display them in a readable user format. My PHP skills are very limited and I would like a few pointers on which aspects of php should I focus. I believe I got the logic right but I'm unsure where to start from.

 

If you have any experience with Moodle, I would appreciate any help you can offer.