how to do special character validation in PHP

Posted by php learner on Stack Overflow See other posts from Stack Overflow or by php learner
Published on 2010-05-26T06:14:23Z Indexed on 2010/05/26 6:31 UTC
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I have lot of textarea fields to add comments and quotes. How can I validate these fields. I checked null validation other than null validation what validation I have to do?

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