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Best PHP Scripts ~ Captcha Scripts

 CAPTCHA is a program that can differentiate between human and computer bot. Website spam has become a nightmare for most webmasters and the following CAPTCHA php scripts help in automatic bots prevent and contact form spam. Some of them include image CAPTCHAs scripts where a user need to verify randomly generated characters..

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reCAPTCHA
reCAPTCHA is a free and powerful captcha script and developed at carnegie mellion university.
License: Free | Added on: 2007-07-08 | Votes: 92 | Details | Visit
3052
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Egglue Semantic CAPTCHA
Egglue Semantic CAPTCHA generates intuition based CAPTCHA challenges. Visitors are presented with two meaningful sentences as plain texts, each missing one verb. Visitors are asked to type in...
License: Free | Added on: 2009-06-26 | Votes: 36 | Details | Visit
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PHP CAPTCHA
PHPCaptcha is a class library written in PHP to prevent spam using image and audio or visual verification. It is very easy to use this library and all you need to do is just call a function in a...
License: Free | Added on: 2007-04-23 | Votes: 41 | Details | Visit
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KCaptcha
KCAPTCHA is a very good script to generate strong image captchas. It is free and released under open source. It outputs close and distorted characters which makes it harder for bots to guess. It...
License: Free | Added on: 2007-07-10 | Votes: 16 | Details | Visit
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Easy PHP Captcha
Quick and Easy to use PHP CAPTCHA script with detailed usage instructions.
License: Free | Added on: 2007-11-27 | Votes: 33 | Details | Visit
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QuickCaptcha
QuickCaptcha provides quick CAPTCHA image functionality to any website. CAPTCHA image verification is a must use in contact forms, online forms to prevent spams and bot registrations. It runs on...
License: Free | Added on: 2007-05-21 | Votes: 11 | Details | Visit
1162
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Captcha Creator
Captcha creator is a professional commercially available script that generates very strong captchas where only humans can recognize and verify it. It virtually makes it impossible for automated...
License: Commercial | Added on: 2007-04-28 | Votes: 16 | Details | Visit
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HKCaptcha
HK Captcha was written with captcha-defeating in mind. It is free to use
License: Free | Added on: 2007-06-18 | Votes: 13 | Details | Visit
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Contact Form
PHP contact form features: (1) to prevent spam, a user is required to enter a security code; (2) the script checks that all form fields are filled and that e-mail address has the correct form;...
License: Free | Added on: 2008-02-08 | Votes: 12 | Details | Visit
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BotProof Email
BotProof Email is a very useful script class which hides contact emails in your website and prompts users for image verification before showing them your direct email. It requires PHP 4.1 and...
License: Free | Added on: 2007-05-16 | Votes: 10 | Details | Visit
428
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PHP Captcha With Refresh
PHP class can be used to generate CAPTCHA validation images. It generates an image with a given width and height display a random validation text with a given length. The generated random text...
License: Free | Added on: 2009-05-26 | Votes: 13 | Details | Visit
202
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Securimage PHP Captcha
A free opensource PHP CAPTCHA script for generating complex images and codes to protect from spam and abuse.
License: Free | Added on: 2009-08-25 | Votes: 15 | Details | Visit

Total: 12

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