Question

I am trying to make a PHP chat script and I want to make sure it doesn’t display any entries older than 1 minute. The database contains a timestamp on each row called timestamp.

How can I do this?

Answer 1

SQL

SELECT *
FROM tablename
WHERE timestamp > TIMESTAMP(DATE_SUB(NOW(), INTERVAL 1 MINUTE))

It’s been a while since I’ve used that particular function, so I might be a bit off but it’s close.

JavaScript

It sounds like you might want to actively hide old messages. In that case you need to include the timestamp meta-data so you can filter it using JavaScript.