El objetivo de este proyecto es la generación de captchas de seguridad básica generando imágenes relativamente amigables para el usuario.

Example

This project provides the SimpleCaptcha class.

Basic example:

session_start();
$captcha = new SimpleCaptcha();
// Change configuration...
//$captcha->wordsFile = null;           // Disable dictionary words
//$captcha->wordsFile = 'words/es.txt'; // Enable spanish words
//$captcha->session_var = 'secretword'; // Change session variable
$captcha->CreateImage();

... will output:

You can validate the php captcha with:

if (strtolower(trim($_REQUEST['captcha'])) != $_SESSION['captcha']) {
    return "Invalid captcha";
}

Live examples

(currently disabled for some time)

here are 3 live examples: (you can reload the page to refresh the images)

You can see more live examples at:
http://joserodriguez.cl/cool-php-captcha/example-form.php

More examples

Background and foreground colors, dictionary words, non-dictionary random words, blur, shadows, JPEG and PNG support:

The images are similar to google captchas.