For a class I'm doing a web site in PHP for a project (see http://cboard.cprogramming.com/showthread.php?t=74740), and I have to produce a "class diagram."

We're doing the site procedurally rather than using OO, so how would I go about in creating a class diagram or something similar? Since we're not going to have C-like classes, should we just make each "class" object a page in the site? Or, should we model the real-world objects (e.g., users, airplanes, students, instructor, ...)?

The instructor didn't give me good feedback, so that's why I posted here.