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Yaf_Request_Abstract::setBaseUri() is a method in the PHP framework called Yet Another Framework (Yaf). It is used to set the base URI for the current request.

The base URI is the portion of the URL before the path. It is helpful when your application is running in a subdirectory on the web server. By setting the base URI, Yaf will strip it from the request URI when routing requests.

Here is an example to illustrate its usage:

php
$request = new Yaf_Request_Http('/subdirectory/controller/action');
$request->setBaseUri('/subdirectory');

// Now, the request URI has been modified to '/controller/action'


In the example above, the base URI is set to "/subdirectory". When the setBaseUri() method is called, it modifies the request URI by removing the base URI from it. This is useful for routing purposes, as the framework can correctly identify the controller and action to be executed.

Note that this method is only applicable when you are using the Yaf framework in PHP.