Counting number of connected user to the site

[Newrules]

Im not sure how to get this, in asp its done by
using global.asa, but I now sure on php

[ucbones]

One solution that works adequately uses sessions and MySQL (or other DB system).

Create a table with a varchar(32) field and an int field.

Each time someone requests a page, see if their session ID exists in the database, if it does, update the int field with the current timestamp. Otherwise, insert a new record to the db.

To count the current users online, select all rows from the DB where the tstamp >= the current time minus say 5 minutes.

HTH,

ucbones