Am 25.08.2011 11:01, schrieb John Black:
True, a SESSION can be reset by closing the browser but I am not
trying to deny a user from submitting different information again. I
want to prevent them from submitting the same data again by accident
(back button or refresh).
what about storing an md5 of the message body in the db?
that way you could check if the mail is exactly the same.
probaply you could let the md5 stay in the db for hours so that nobody
could use 2 browser windows to send mail1, mail2, mail1, ....
it wouldn't even be necessary to store the identity of the sender since
its highly inprobable that 2 100% identical messages contain anything
worth bothering about.
http://php.net/manual/en/function.md5.php
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