Class: DHTML and CSS CAPTCHA (css, progressbar, color, dhtml)

Screenshots:

File	Role	Description
`screenshot.png`	Screen	screenshot

Supplied by:

Name:	Alexander Selifonov `<e-mail contact>`
Published packages:	4
Country:	Russian Federation - PHP jobs in Russian Federation
Home page:	`http://www.selifan.ru/`
Age:	45
All time rank:	153
Week rank:	47

Browse this author's classes

Innovation Award:

PHP Programming Innovation award nominee

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:	85.72 (0.14%)
Popularity rank:	29,957 (PHP Classes: 219)
Vitality score:	1.00 (0.00%)
Rating:	Not yet rated Please rate this class in Freshmeat

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%)`	17
Month:	Not yet rated by the users

Applications that use this class:

Link	Description
guest book	Historical Reconstruction workshop Sd-Recons

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.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_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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	Screenshots		Supplied by		Groups		Detailed description		Freshmeat project

Class: DHTML and CSS CAPTCHA

Screenshots:

Supplied by:

Innovation Award:

Groups:

Detailed description:

Freshmeat project:

User ratings:

Applications that use this class:

Files: