Are-You-A-Human (PHP)

"Are you a human" is a hosted CAPTCHA tool.

The library allows their CAPTCHAs to be used inside PHP-powered apps.

This is not an officially-supported library, but works well nevertheless.

Unlike the official library, this library can be used with any PHP framework benefiting from a PSR-0 compliant autoloader. This includes Zend, Symfony, etc..

Plugins and libraries for other platforms include:
Python
PHP (official)
Ruby
Perl
Java
.NET
Node.js (JavaScript)
WordPress
Drupal
vBulletin
IP.Board
phpBB

Requirements:

• PHP 5.3 or higher
• Are You a Human API key credentials