exemplo de web.config para habilitar Url Rewrite com PHP no IIS

gistfile1.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<configSections>
<sectionGroup name="system.webServer">
<sectionGroup name="rewrite">
<section name="rewriteMaps" overrideModeDefault="Allow" />
<section name="rules" overrideModeDefault="Allow" />
</sectionGroup>
</sectionGroup>
</configSections>

<system.webServer>
<security>
</security>
<directoryBrowse enabled="true" />
<caching>
<profiles>
<add extension=".php" policy="DisableCache" kernelCachePolicy="DisableCache" />
<add extension=".html" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="14:00:00:00" />
</profiles>
</caching>
<rewrite>
<rules>
<rule name="block favicon" stopProcessing="true">
<match url="favicon\.ico" />
<action type="CustomResponse" statusCode="404" subStatusCode="1"
statusReason="The requested file favicon.ico was not found"
statusDescription="The requested file favicon.ico was not found" />
</rule>
<rule name="Imported Rule 1" stopProcessing="true">
<match url="^(.*)$" ignoreCase="false" />
<conditions>
<add input="{HTTP_HOST}" pattern="^example\.com$" />
</conditions>

<action type="Redirect" redirectType="Permanent" url="http://www.example.com/{R:1}" />
</rule>
<rule name="Imported Rule 2" stopProcessing="true">
<match url="^(.*)$" ignoreCase="false" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" negate="true" />
<add input="{URL}" pattern="^/favicon.ico$" ignoreCase="false" negate="true" />
</conditions>
<action type="Rewrite" url="index.php?q={R:1}" appendQueryString="true" />
</rule>
</rules>
</rewrite>
<defaultDocument>
<files>
<remove value="index.php" />
<add value="index.php" />
</files>
</defaultDocument>

</system.webServer>
</configuration>