Track the Refferer of a customer

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I am using who is online enhancement that shows me all customers/guests/spiders logged in and the reffer url. when i click on it, it takes me to the page and i can see what they typed in the search engine.

 

Now i need to have the same functionality but want to

- permenantly store them in the database

- and email the link along with the order to me only.

 

If someone has done it ir have an idea how will i do that. I will appreciate that.

 

Thanks