php mysql encryption

[tombell]

Hello everyone,

I have a script that retrieves data from mysql and allows users to edit and delete details.
What I would like to know is, if there is a way to encrypt in some way the following link after the ? :

delete.php?id=12 and
edit.php?id=34&cid=9

is there any way?
Thanks

[Wien]

if you mean to cryp the ID, why don't you have a look to these functions :
mcrypt_generic
mdecrypt_generic()

--> http://www.php.net/manual/en/function.mcrypt-generic.php

[tombell]

Ok, I found that the base64_encode function suits my needs. I didn't have mcrypt built in my system.

Another question:

The only way to get the previous page a user came from is with sessions or is there any other way?

Thanks again

[Wien]

Try $_SERVER['HTTP_REFERER'] to get the page users come from.
I don't exactly remember but it doesn't work in every circumstances, like with frames there is a strange behaviour I can't remember. But i helps...

actually it's
$HTTP_REFERER
or $HTTP_SERVER_VARS['HTTP_REFERER']
or $_SERVER['HTTP_REFERER']

[tombell]

yes $HTTP_REFERER it is.
thanks a lot