This is not a simple one to accomplish. it require a good understanding of creating recordsets, setting session, doing basic math in PHP and updating the database. It will require some hand coding to accomplish.
you would need to have a table that stores the view count.
it will need a column to hold the productID and the count
create a recordset to return the count column for the product using the product ID querystring to filter.
store the count in a session variable and increment it by one.
then add an update record behavior to store the new count in the database.
you can use the session to show the currant count.
We wont be able to offer a lot of help on setting this up, if you need assistance, i would suggest signing up for a premiere ticket appointment where we would be able to work with you in a one on one scenario.