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Class: Another CAPTCHA project

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  Classes of László Zsidi  >  Another CAPTCHA project  >  Download  >  Support forum Support forum (5)  >  Blog Blog  >  RSS 1.0 feed RSS 2.0 feed Latest changes  
Name: Another CAPTCHA project Support forum
Base name: animated_captcha
Description: CAPTCHA validation using animated images
Version: -
Required PHP version: -
License: Freeware
 
  Screenshots Screenshots   Author   Group folder image Groups   Detailed description  
  Dependencies   Trackback   Applications   Related links   Files Files  

Screenshots

Example CAPTCHA image
File Role Description
Accessible without login Image file captcha.gif Screen Example CAPTCHA image
Accessible without login Image file Captcha_volume2.gif Screen Captcha vol.2 class screenshot

Author

Picture of László Zsidi
Name: László Zsidi <e-mail contact>
Published packages: 13 Browse this author's classes Browse this author's classes
Country: Hungary Hungary - PHP jobs in Hungary
Home page: http://camder.com/

Innovation Award

PHP Programming Innovation award winner
October 2006
Winner
 CAPTCHA validation has become a widely adopted method to prevent that people use robot scripts to abuse from Web site content or services.

It uses images with fuzzy text to make it more difficult for robots that attempt to automatically read the text that is written. Meanwhile, several techniques have been developed to discover the text in the CAPTCHA validation images.

This class provides a more advanced solution that employs animated images to render the verification text.

It raises the bar in terms of the difficulty that it imposes to robots, as the actual text is never completely displayed in each of the animated image frames.

Manuel Lemos

Groups

Group folder image Graphics Colors, images, charts and picture formats View top rated classes
Group folder image Validation Validation algorithms View top rated classes
Group folder image Security Security protection and attack detection View top rated classes

Detailed description

This package can be used to perform human user validation using CAPTCHA images (Completely Automated Public Turing to tell Computers from Humans Apart).

It generates a sequence of animated images, assembled with in a GIF animation file, to make it more difficult to break by robots because the validation text does not completely appear in each of the animation images.

The text length, color and font are configurable.

Packages needed by this class

Class Dependency Why it is needed
GIF images into animated GIF with native PHP class
Required
 Generating single animation

Trackback links

Link Description
Animated CAPTCHA in PHP Found an easy way to create animated CAPTCHAs in PHP...
Animierte CAPTCHAS? Ein Ungar macht es möglich: Another CAPTCHA project CAPTCHAS gibt es ja überall, und darunter gibt es wiederum schöne und weniger schöne...
Latest blog trackback links Latest blog trackback links

Applications that use this class

No application links were specified for this class.
Add link image If you know an application of this package, send a message to the author to add a link here.

Related links

Link Description
Demo pages CAPTCHA 2 demo page
Demo pages CAPTCHA 3 demo page
Demo pages CAPTCHA 4 demo page
Donate Page Donate to development
Download page Download originaly tested and packed CAPTCHA generators

Files

File Role Description
Plain text file Captcha.class.php Class animated CAPTCHA creator class
Plain text file captcha.php Example CAPTCHA image resource file
Files folder image captcha
  Plain text file captcha_files.txt Data CAPTCHA real files holder directory
Plain text file Captcha2.class.php Class Captcha.class.php - Volume 2
Files folder image fonts
  Plain text file fonts.txt Data Truetype fonts holder directory
Plain text file index.php Example Example index file
Download all files: animated_captcha.tar.gz animated_captcha.zip
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