How to make a ticket count for a feedback form?

Question

PHP

I explain: there is a form on the site, feedback to send to the administrator from the visitors of the message.
the question is how to calculate each message, so that when the admin receives a message from the visitor, he sees the number of this application.
for example like this:
message #100500
and when the next one sends message #100501
what to add to php code for sending messages?

Answer 1

Take the current number of the application from the text editor or database and substitute it in the letter
. After sending, add one and write down the new number back.