How do I send emails when the site is updated?

Question

PHP

Let's say I have one form and the user must write only an email there, and after that, when I exit (let's say news), I should send a letter to the email that the user indicated with the message that (we have news). How to make it so that the letter is sent automatically and each time with different content (because every time something new comes out)? What can be used for this?

Answer 1

Might be worth digging towards RSS