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PHP Scripts arrow Anti Spam Scripts
Anti Spam Scripts
Anti Spam scripts that will protect your forms to be submited by spammer's bots. Captcha (an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart" ) is the most common and effective spam protection technique.
 
Captcha is a type of challenge-response test used in computing to determine whether or not the user is human or spammer's robot. A CAPTCHA involves one computer (a server) which asks a user to complete a test. While the computer is able to generate and grade the test, it is not able to solve the test on its own. Because computers are unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human.

Protect your forms from spammers with these free php spam protection scripts.
 

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There are 19 listings in this category. Add your free script here
PHP Class hn_captcha PHP Class hn_captcha
This php class generates a picture to use in forms that perform CAPTCHA test (Completely Automated Public Turing to tell Computers from Humans Apart). After the test form is submi ...
(Hits: 1817 | Votes: 3 | Added: 2008-05-01 14:34:54)
Captchar Captchar
Captchar is a simple captcha written in PHP. It requires the GD library and PHP 5 to run. Features include natural-language random word generation, random color generation, and image distortion. It is licensed under the ...
(Hits: 1574 | Votes: 2 | Added: 2010-08-18 03:37:29)
The CAPTCHA The CAPTCHA
Yes, now you can easily protect your site
TheCAPTCHA is creating much more secure from break CAPTCHA images than any script of previous generation. You ...
(Hits: 1497 | Votes: 1 | Added: 2007-10-20 09:29:04)
SpiderSquash Spam, Content Ripper, Hack Bot Blocker SpiderSquash Spam, Content Ripper, Hack Bot Blocker
SpiderSquash detects and blocks malicious automated access to your web site. SpiderSquash uses a central blocking database and advanced statistical analysis techniques to detect and block bad bots. SpiderSquash protect ...
(Hits: 1460 | Votes: 2 | Added: 2010-04-26 01:28:19)
HKCaptcha - yet another PHP Captcha implementation HKCaptcha - yet another PHP Captcha implementation
Yet another captcha implementation in PHP. This one is written with the current state of captcha-defeating research (as of 2007) in mind. Apart from a mathematical letter distortion algorithm tha ...
(Hits: 1365 | Votes: 2 | Added: 2008-05-01 14:11:46)

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