Perl newbie, want to varify data

From: Aaron (aspenamr_at_hotmail.com)
Date: 03/17/04 

Date: 17 Mar 2004 12:47:44 -0800

I am new to Perl and would like to do some data verification. What I
would like to do is have a variable that would hold a contacts name
ex: "john" and make sure that the user did not enter ex: "(#$%!" does
anyone know the code that would be able to make sure that my user
entry contains only a select set of verified characters. Also is it
possible for me to set up another variable that would contain the
acceptable characters that are able to be used in the input. I also
would like to limit the size of this variable to 10 characters.

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