How to store search keyword or browsing history in database

I'm making my final year project. Which is a website. Things I can't do: 1. Store the browsing history of users between their login and logout session on the site. Or 2. Store the search keywords. But I dont know how to do it. Is there any query or functions that I can use??? I'm using xampp server. I'm really stuck in this phase and don't know how to do it. One of my friend told me it's IMPOSSIBLE. Does anyone have a possible solution rather than just IMPOSSIBLE. Please help.