PHP Captcha Script: Securimage

Securimage is an free PHP captcha script used for protecting web forms from spam and abuse.

It can be easily installed and very well documented.

Different than the famous reCAPTCHA, which is web-based, Securimage is a downloadable solution that requires PHP and GD library to work.

PHP Captcha Script

Some feature of this captcha solution:

  • Show an image in just 3 lines of code
  • Validate submitted entries in less than 6 lines of code
  • Customizable code length
  • Choose the character set
  • TTF font support
  • Use custom GD fonts when TTF is not available
  • Easily add background images
  • Multi colored, angled, and transparent text options
  • Arched lines through text
  • Generates audible CAPTCHA files in wav format
  • Use a word list for creating CAPTCHA codes

You can find a demo of the captcha here.

  • Stumbling your own site is pretty lame.

    Thumbs down here….

  • Will

    So is posting that something is lame, and linking to another site. 🙂

  • That is perfect!!!! Works fine, fast and easy to use, thanks a lot! I love this kind of code

  • nasir

    this is a vary good shareing

  • I’ve used the captcha in one of my projects
    http://www.lorztech.com

  • tom

    hey I am trying to use this captcha, but when I use the onsubmit (on the form) it doesn’t work. when i do not use the onsubmit it does work. what can i do to make it work?

  • The PHPCaptcha script has well known security vulnerabilities:

    http://www.idontplaydarts.com/2011/05/exploit-phpcaptcha-securimage/

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