Question

I have a form which inserts the text (of an article) into a database. When a user submits an article (that has already been submitted) it gets submitted also into the db.

How can I detect a duplicate post (like on stackoverflow)?

Should I select everything from the database and check if the submitted post is like a one before. (I want to post the duplicate alert on the article page as the first comment)

Any help appreciated.

Thanks…

Answer 1

Create an unique ID, e.g. with uniq_id(), put it in a hidden field within your HTML form, then save it in the database in a field that is set to UNIQUE. When the INSERT operation fails, you know that the POST has already been sent before.