How to track that a user visited the site each day for X days?

Question

There is a new badge on Stack Overflow. The \"woot\" badge is awarded to users visited the site each day for 30 days. How can you implement a feature like this? How can you trac

Answer 1

Track each visit in your database with a timestamp (which you probably already do anyway). Then create an sql statement and group the result by day, while you count the number of visits that day. In the period of the last 30 days, it's not allowed to have a 0-visit day...