<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <directoryBrowse enabled="false" />
      <rewrite>
        <rules>
          <rule name="Hide Yii Index" stopProcessing="true">
            <match url="." ignoreCase="false" />
 

            <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" 
                  ignoreCase="false" negate="true" />
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" 
                  ignoreCase="false" negate="true" />
            </conditions
 
>
            <action type="Rewrite" url="index.php" appendQueryString="true" />
          </rule> 
        </rules>
      </rewrite>
  </system.webServer>
</configuration>

轉自：http://ju.outofmemory.cn/entry/178850

Yii IIS8下使用偽靜態【Url Rewrite】去掉index.php