Storing user entered data in the session

[email protected] (Mike Alaimo)
Newsgroups php.general
Message-ID <[email protected]> 
Can anyone guide me here?  I have the desire to store user entered
data into the session.  I am regexing it to be only a-zA-z0-9 and a
space.  The data is stored in an object and then serialized before
storing it into the session.  Does anyone see any potential security
risks here?

Thanks,

Mike
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