You configure this feature by creating a trusted context object on the federation server and an identity assertion object (DB2 trusted context or Oracle proxy user) on the remote data source.
要配置该功能，可以在联合服务器上创建一个可信上下文对象，在远程数据源上创建一个身份断言对象(DB2可信上下文或Oracle代理用户)。
The proxy included in the sample files also requires a PHP server accessible from the Internet. (the proxy is provided with the source code, but isn't discussed in the tutorial.)
本示例文件中所包含的代理也需要可从Internet访问的PHP服务器(代理通过源代码提供，但本文并没有对此做详细讨论)。
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