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PHP: 21 Best CAPTCHAs: Bloggers Boon & Spammers Bane

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PHP » Basics — almost 11 years ago
Do you know about “Completely Automated Public Turing test to tell Computers and Humans Apart,” terminology? If you are a blogger then you must have used this in your various projects, while designing a contact form, login form or any other type of registration forms.

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