PHP GD Library: Captcha and the Alternatives

Tutorials Shared by the Internet Community

Advertisements


PHP GD Library: Captcha and the Alternatives

Most of us have probably encountered a Captcha system on the web in the past few years, sometimes without even knowing it.

Statistics

  • Total Hits - 33950

  • Total Votes - 96 votes

  • Vote Up - 41 votes

  • Vote Down - 55 votes

  • Domain - www.talkphp.com

  • Category - PHP/Image Manipulation

  • Submitted By - Devesh Khanna

  • Submitted on - 2008-03-16 07:17:17

Description

Most of us have probably encountered a Captcha system on the web in the past few years, sometimes without even knowing it.<br /><br />Captcha systems are designed to filter out automated "spam bots" from posting to websites that accept submissions such as forums and blogs by asking the user to solve a problem. These problems can range from typing in the letters and numbers displayed in an image to answering a simple math question or selecting the correct image.    More detail...


Broken  |   Tweet  |   Facebook  |     |   Save  |   Liked  |   Down

Advertisements