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SGCaptcha: CAPTCHA validation using geometric shapes

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Last Updated Ratings Unique User Downloads Download Rankings  
2014-07-21 (5 months ago) RSS 2.0 feedNot enough user ratingsTotal: 347 This week: 4All time: 6,291 This week: 412Up
Version License PHP version Categories  
sgcaptcha 1MIT/X Consortium License5.0PHP 5, Graphics, Validation, Security
Description Author  

This class implements CAPTCHA validation using geometric shapes.

It can generate an image with several geometric shapes and associated numbers on them.

The user is required to enter the numbers that are in images of one of the types of geometric shape displayed in the end of the CAPTCHA image.

The correct answer is stored in session variable for subsequent verification.

Innovation Award  
PHP Programming Innovation award nominee
July 2014
Number 3


Prize: One downloadable copy of PhpED Professional
CAPTCHA solutions are useful to prevent that sites are abused by robot scripts.

However, some CAPTCHA solutions become a little to hard to authenticate real users.

This class implements an approach that provides a simple solution by letting the users pick numbers associated with given geometric shapes displayed around the numbers.

Manuel Lemos
Picture of Francisco del Aguila
Name: Francisco del Aguila <contact>
Classes: 1 package by
Country: Spain Spain
Age: 48
All time rank: 329888 in Spain Spain
Week rank: 447 Up18 in Spain Spain Up
Innovation award
Innovation award
Nominee: 1x

Screenshots  
  • Image1.jpg
  Files folder image Files  
File Role Description
Accessible without login Plain text file example.php Example Sample use of sgcaptcha.php
Accessible without login Plain text file LICENSE.txt Lic. License
Accessible without login Plain text file README.txt Doc. Basic information
Plain text file sgcaptcha.php Class The sgcaptcha class

 Version Control Unique User Downloads Download Rankings  
 0%Total:347All time:6,291
 This week:4This week:412Up