Add captcha security images to your website to combat spam for FREE using php. Security Image enables you to easily add Captcha security images to any form on your website. It uses PHP4 (and GD, which is bundled with PHP4).
This CAPTCHA has three main features. Including several random colored lines that are arranged randomly, random image background color, and random text position. This allows humans to read the image, but not robots or computers.
This PHP script protects your email address from malicious site crawling spam robots. This script uses many methods of protection. The most obvious is the use of a CAPTCHA that expires every 3 min to prevent brute force attacks. There are some hidden features as well. There are two CSS hidden form f... Read more
TheCAPTCHA - a powerful PHP script to protect your site from spambots. Free and open-source. Easy to install. TheCAPTCHA is creating much more secure from break CAPTCHA images than any script of previous generation.
Phoca CAPTCHA class is a small free class to show CAPTCHA image in your form. You can safe your form from Spam. you need PHP with GD library but you need not TTF support.
Scrambling text by add fake text in between chunks of real text. A good alternative to encryption making letters and numbers unreadable with PHP pure scripting.
Free for non-commercial useVersion: 1
Platform: Linux, Windows, Mac OSX, Sun Solaris, FreeBSD
Updated Date: 2007-12-26
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