crypt and decrypt a string

From: Date: Fri, 05 Oct 2001 14:19:39 +0000
Subject: crypt and decrypt a string
Groups: php.general 
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Does anybody have an easy way to crypt and decrypt a string? I see the Mcrypt Encryption module but thats a little more gung-ho than I'm looking for. I'm not trying to encrypt sensitive data rather I'm more trying obfuscate it a variable for a hidden tag. Thought I remember seeing something using XOR? Any ideas? Thanks Joel

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