PHP Classes

DHTML and CSS CAPTCHA: CAPTCHA validation using colored boxes and AJAX

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Ratings Unique User Downloads Download Rankings
StarStarStarStar 61%Total: 5,131 All time: 517 This week: 56Up
Version License PHP version Categories
as_snipercaptcha 1.03.007GNU General Publi...4.3.0Validation, Security, AJAX
Description 

Author

Alexander Selifonov

This class can be used to implement CAPTCHA validation using colored boxes that the user must click which are validated using AJAX requests.

It renders a grid of boxes on which only one box is colored differently to indicate the user must click it.

The class sends an AJAX request to the server passing the coordinates of the user clicks until a given number of clicks correctly point to the colored boxes.

Innovation Award
PHP Programming Innovation award nominee
March 2008
Number 2

Prize: One downloadable copy of PhpED Professional		 CAPTCHA is the name of an approach used to distinguish site accesses performed by real humans from robot script accesses.

Usually the pages show fuzzy pictures with letters that the user needs to guess. However there are smart anti-CAPTCHA robots that can also guess what is written in CAPTCHA picture.

This package provides an alternative CAPTCHA solution that consists in using colored boxes that the user must click in order to have access to the protected site resources.

Since this is a new approach, it is harder to break by people that employ common anti-CAPTCHA scripts.

Manuel Lemos
Picture of Alexander Selifonov
  Performance   Level  
Name: Alexander Selifonov <contact>
Classes: 20 packages by
Country: Russian Federation Russian Federation

Level 5 StarStarStarStarStar

 Innovation award
Innovation award
Nominee: 16x

Winner: 2x

Screenshots (1)  
  • screenshot.png
  Files folder image Files (12)  
File Role Description
Plain text file as_snipercaptcha.php Class Main class file
Plain text file as_snipercaptcha_j.php Class jQuery version of a main class
Accessible without login HTML file as_snipercaptcha.en.htm Doc. Documentation (English)
Accessible without login HTML file as_snipercaptcha.ru.htm Doc. Documentation (Russian)
Accessible without login Image file cap_progress.png Icon image for showing progress bar
Accessible without login Plain text file as_jsfunclib.js Data javascript function set needed by class
Accessible without login Image file captchasight.png Icon image for marking table cells
Accessible without login Image file captcha_init.gif Icon image used for "init" link
Accessible without login Plain text file captcha_styles.css Data styles for drawing CAPTCHA block
Accessible without login Image file empty.gif Icon empty (transparent pixel) image
Accessible without login Plain text file sample.php Example using class sample

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Downloadas_snipercaptcha-2008-12-09.zip 31KB
Downloadas_snipercaptcha-2008-12-09.tar.gz 24KB
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 Version Control Unique User Downloads Download Rankings  
 0%
Total:5,131
This week:0
All time:517
This week:56Up
User Ratings User Comments (1)
 All time
Utility:80%StarStarStarStarStar
Consistency:75%StarStarStarStar
Documentation:66%StarStarStarStar
Examples:72%StarStarStarStar
Tests:-
Videos:-
Overall:61%StarStarStarStar
Rank:1026
  

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Captchas sind eine feine Sache...

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