DHTML and CSS CAPTCHA (guestbook, color, ajax grid, dhtml)

Name:	DHTML and CSS CAPTCHA Support forum
Base name:	`as_snipercaptcha`
Description:	CAPTCHA validation using colored boxes and AJAX
Related top rated classes:	guestbook, color, ajax grid, dhtml
Version:	`1.03.007`
Required PHP version:	`4.3.0`
License:	GNU General Public License (GPL)
All time users:	3414 users
All time rank:	584
Week users:	30 users
Week rank:	145

	Screenshots		Author		Groups		Detailed description		Freshmeat project

	User ratings		Trackback		Applications		Files

Screenshots

File	Role	Description
`screenshot.png`	Screen	screenshot

Author

Name:	Alexander Selifonov is available for providing paid consulting. Contact Alexander Selifonov .
Published packages:	8 Browse this author's classes
Country:	Russian Federation - PHP jobs in Russian Federation
Home page:	`http://www.selifan.ru/`
Age:	47
All time rank:	91
Week rank:	38

Innovation Award

March 2008
Number 2

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

Groups

Validation	Validation algorithms	View top rated classes
Security	Security protection and attack detection	View top rated classes
AJAX	Interact with the Web server without page reloading	View top rated classes

Detailed description

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.

Freshmeat project

Project record:	`as_snipercaptcha`
Popularity score:	31.43
Vitality score:	1.0

User ratings

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Perfect (100.0%)`	`Good (83.3%)`	`Good (91.7%)`	`Good (91.7%)`	`-`	`-`	`Sufficient (76.7%)`	25
Month:	Not yet rated by the users

Trackback links

Link	Description
Ca(p)tch(a) me	Captchas sind eine feine Sache...

Latest blog trackback links

Applications that use this class

Link	Description
guest book	Historical Reconstruction workshop Sd-Recons
kvn.baikal.ru	Russian Humor contest community

If you know an application of this package, send a message to the author to add a link here.

Files

File	Role	Description
`as_snipercaptcha.php`	Class	Main class file
`as_snipercaptcha_j.php`	Class	jQuery version of a main class
`as_snipercaptcha.en.htm`	Doc.	Documentation (English)
`as_snipercaptcha.ru.htm`	Doc.	Documentation (Russian)
`cap_progress.png`	Icon	image for showing progress bar
`as_jsfunclib.js`	Data	javascript function set needed by class
`captchasight.png`	Icon	image for marking table cells
`captcha_init.gif`	Icon	image used for "init" link
`captcha_styles.css`	Data	styles for drawing CAPTCHA block
`empty.gif`	Icon	empty (transparent pixel) image
`sample.php`	Example	using class sample

Download all files: as_snipercaptcha.tar.gz as_snipercaptcha.zip
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Class: DHTML and CSS CAPTCHA

Innovation Award