crypt function



hello, i have found out that my server DOES lt you use the crypt function firstly...

What i want to know is this:

I have an ip address, and it is going to be crypted using the
crypt() function

When i crypt it again, the crypted version is differnet of course.

What code would i need to write in php to determine if the two crypted codes give the same ip address, because you cannot decrypt with the crypt() function?
There are many classes available...
try hotscripts, for such crypt fUnctions...

remeber they should be 2ways...