IIS cannot add duplicate collection items of type add when configuring PHP

admin · Posted on 2/5/2015 9:39:19 AM

Today, when configuring the php program in IIS7, I got the following error

Configuration error When the unique key attribute "value" is set to "index.php", you cannot add a duplicate collection item of type "add"
configuration file \\*******\web\web.config

web.config

<defaultDocument>
<files>
<add value="index.php" />
</files>
</defaultDocument>

The error is due to the default document set to index.php in IIS, and IIS gets another add with the same value to throw an exception, and the solution is to add <clear /> before < add/>

That is, modify the web.config to:

<defaultDocument>
<files>
<clear />
<add value="index.php" />
</files>
</defaultDocument>

This approach works well with any .NET configuration that can create inheritance confusion

[Web] IIS cannot add duplicate collection items of type add when configuring PHP

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