PHP Classes

Another CAPTCHA project: CAPTCHA validation using animated images

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Ratings Unique User Downloads Download Rankings
StarStarStar 59%Total: 5,543 All time: 442 This week: 673Down
Version License Categories
animated_captcha 1.0.0FreewareGraphics, Validation, Security
Description 

Author

László Zsidi

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.

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
Picture of László Zsidi
Name: László Zsidi <contact>
Classes: 13 packages by
Country: Hungary Hungary
Age: 51
All time rank: 331 in Hungary Hungary
Week rank: 46 Down1 in Hungary Hungary Equal
Innovation award
Innovation award
Nominee: 10x

Winner: 1x

Screenshots (2)  
  • captcha.gif
  • Captcha_volume2.gif
  Files folder image Files (8)  
File Role Description
Files folder imagecaptcha (1 file)
Files folder imagefonts (1 file)
Plain text file Captcha.class.php Class animated CAPTCHA creator class
Plain text file captcha.php Example CAPTCHA image resource file
Plain text file Captcha2.class.php Class Captcha.class.php - Volume 2
Plain text file index.php Example Example index file

  Files folder image Files (8)  /  captcha  
File Role Description
  Plain text file captcha_files.txt Data CAPTCHA real files holder directory

  Files folder image Files (8)  /  fonts  
File Role Description
  Plain text file fonts.txt Data Truetype fonts holder directory

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Downloadanimated_captcha-2007-02-19.zip 65KB
Downloadanimated_captcha-2007-02-19.tar.gz 66KB
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Needed packages  
Class DownloadWhy it is needed Dependency
GIF images into animated GIF with native PHP class Download .zip .tar.gz Generating single animation Required
 Version Control Unique User Downloads Download Rankings  
 0%
Total:5,543
This week:0
All time:442
This week:673Down
 User Ratings  
 
 All time
Utility:88%StarStarStarStarStar
Consistency:76%StarStarStarStar
Documentation:-
Examples:77%StarStarStarStar
Tests:-
Videos:-
Overall:59%StarStarStar
Rank:1290
  

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  Related pages  
CAPTCHA 2 demo page
CAPTCHA 3 demo page
CAPTCHA 4 demo page
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  Pages that reference this package  
Found an easy way to create animated CAPTCHAs in PHP...
CAPTCHAS gibt es ja überall, und darunter gibt es wiederum schöne und weniger schöne...

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