Line 14: Declare the class session.
Line 16 to 23: Declare some variables this class hold.
Line 39: Declare the function start
Line 41 to 48: Initialize some variable, and get the time, browser, current page, and cookie data to store them.
Line 49 to 59: If we're using a cookie, grab data from that cookie, and store session id.
Line 60 to 64: Otherwise we're using session... do it the 'session' way.
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