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OCR CAPTCHA: Generate images to test whether the user is human

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Last Updated Ratings Unique User Downloads Download Rankings  
2004-04-13 (10 years ago) RSS 2.0 feedStarStarStar 54%Total: 7,257 All time: 236 This week: 853Down
Version License Categories  
ocr_captcha 1.0.0GNU General Public Lice...Graphics, Validation, Security
Description Author  

This class is meant to generate CAPTCHA (Completely Automated Public Turing to tell Computers from Humans Apart) images to test whether the user accessing a site is a real human or an automatic script.

The class generate an image with a random key text string printed on it mixed with some noise made of random text characters or line grid.

The image is meant to be used in a form so the user reads the key text in the image and must enter it to prove that is a real human.

The form also passes an hidden field that contains a public key that is used when the form is submitted to the server to verify whether the key text on the image matches what the user entered.

Picture of Julien PACHET
Name: Julien PACHET <contact>
Classes: 15 packages by
Country: France France
Age: 38
All time rank: 261 in France France
Week rank: 130 Down9 in France France Down

  Files folder image Files  
File Role Description
Plain text file class_ocr_captcha.inc.php Class class file
Accessible without login Plain text file example.php Example test the class

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