SPAM, it's not just a type of meat featured in Monty Python, it is also one of the most annoying plagues of modern day life. If you've got an email address then chances are you know what it's like to get spammed, and the same goes for Forums too. This guide uses PHP and the GD Image Library to show one possible method of stopping "Spam-bots" from submitting junk on your site's forms.
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