Securimage CAPTCHA - Free PHP Captcha Script

What is Securimage?

Securimage is an open-source free PHP CAPTCHA script for generating complex images and CAPTCHA codes to protect forms from spam and abuse. It can be easily added into existing forms on your website to provide protection from spam bots. It can run on most any webserver as long as you have PHP installed, and GD support within PHP. Securimage does everything from generating the CAPTCHA images to validating the typed code. Audible codes can be streamed to the browser with Flash for the vision impaired.

Check out the quickstart guide to get going fast
See live example sites using Securimage
Download the latest version

Features

Show an image in just 3 lines of code
Validate submitted entries in less than 6 lines of code
Customizable code length
Customizable character sets
TTF font support
Use custom GD fonts when TTF is not available
Easily add background images
Multi colored, distorted, and transparent text options
Customizable Flash button to stream MP3 audio of CAPTCHA code
Use a word list for generating codes

Securimage Example

Securimage 2.0.1 Beta Released

December 6, 2009 – 3:36 pm

An updated version of the 2.0 beta version has been released. It adds support for users with cookies disabled (requires PHP5 & SQLite support), code timeouts, fixes to color allocation, and an easier way to define colors.

This is the recommended version for new installations. Please report any problems or suggestions.

Posted in Uncategorized | 13 Comments »

Example Sites Cleared

November 19, 2009 – 1:20 am

The list of Example Sites has been cleared to remove outdated sites and to make room for newer examples using version 2.0. While the list is short take advantage and submit your site for maximum visibility!

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FAQ Updated

November 12, 2009 – 11:47 pm

The FAQ page has been updated to address solutions to some common misconfigurations and server incompatibility issues with Securimage. If you have any problems be sure to check the new page for a possible solution. If it is not included then feel free to post a comment with your problem.

The gallery will be updated shortly with new examples from version 2.0 along with the code used to customize the image.

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Securimage 2 Beta Released

November 11, 2009 – 1:47 am

A new version of Securimage CAPTCHA has been released that introduces several new features and fixes several issues with the previous version. Among some of the new features are increased CAPTCHA difficulty using mathematical distortion, streaming MP3 audio of CAPTCHA code using Flash, random audio distortion, improved session support, randomized backgrounds and more.

The code is currently in beta until feedback from the community shows it stable. If you are able to get a satisfying CAPTCHA working on your site then it should work without any problems.

The new version includes several examples and simplified code. The examples can be used out of the box and can easily be changed to create very unique images.

Be sure to check out the CAPTCHA Gallery for some examples from 2.0 and head to the Download page to get the new version.

Posted in Securimage News | 6 Comments »

Minor Bugfix and Site Updates

March 25, 2008 – 4:40 pm

Version 1.0.3.1 was made available yesterday which fixes a problem when using the word list feature. If you do not use this or were not experiencing any problems then there is no need to update.

An article about using Securimage with Ajax was also published yesterday, you can view it here.

We have also released a tool which can obfuscate your email address in Javascript code for those who need to post their email address on their website. Check out the Email Address Obfuscator tool.

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Securimage PHP Captcha