Best solution to anti-spam in PHP?

Posted by user198729 on Stack Overflow See other posts from Stack Overflow or by user198729
Published on 2010-04-03T05:45:27Z Indexed on 2010/04/03 5:53 UTC
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How to distinguish robots from normal user?

How does SO do this job?

Currently I'm met with a robot which post once every 1 hour...

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