Tags → Captcha Image Tutorial

Creating a CAPTCHA in PHP with GD

A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a system designed to test if input is originating from a human or a computer. This tutorial will explain how to make your own CAPTCHA using PHP and the bundled ...

• Categories
  • PHP →
  • Tips and Tutorials →
  • Image Manipulation
• Platforms
  • Linux,
  • Windows
• Licenses
  • Freeware

Math Captcha image validation

With all the Captcha decoders these days, its impossible to build a solid Captcha image validator with a string. The solution? Have a captcha that asks simple math addition questions! Decoders are not very good at breaking these. This tutorial ...

• Categories
  • PHP →
  • Tips and Tutorials →
  • Security
• Platforms
  • Linux,
  • FreeBSD
• Licenses
  • GPL