PHP OpenID 库

该项目是一个使 PHP 开发的网站支持 OpenID 认证的框架 ，它包含了 OpenID Consumer、存储实现以及 OpenID Server 的实现，最新版本 2.x 的主要特性包括：

• Runs on a wide range of PHP versions: from 4.3.0 and up (tested on 5.2.4)
• Licensed under the Apache Software License.
• Includes extensive documentation, working example code, and a test suite
• Attempts to use PHP extensions such as Curl, but does not depend on them
• Includes extension modules for Attribute Exchange, Simple Registration, and PAPE
• Supports i-names
• Tested on Windows and Linux
• Versions 2.x.x support both major OpenID protocol versions transparently