How to use PHP files with custom error page in Web.config

Question

I have a file called error.php, he takes the value GET or an already defined variable and display errors in multiple languages and of all types.

I use IIS and have tried on Web.config to use PHP pages, but I did not succeed, I can only with HTML pages that is not my purpose.

How can I use the.php error file as an error page in Web.config?

Current web.config:

    <?xml version="1.0" encoding="UTF-8">
    <configuration>
       <system.webServer>
            <httpErrors errorMode="Custom">
                <remove statusCode="401" />
                <error statusCode="401" path="sys\error\401.html responseMode="File" />
                .....
            </httpErrors>
        </system.webServer>
    </configuration>

And I tried to use it this way, but it didn’t work:

 <error statusCode="401" path="sys\error.php?number=401" responseMode="File" />

Answer 1

I believe that responseMode="File" send the reply as if the file were a static file, if you want to "run it", you should not use \ reversed in this case and the path should start from "root" / (with bar in front) like this:

<error statusCode="401" path="/sys/error.php?number=401" responseMode="ExecuteURL" />

Tested in IIS8 Express, I believe it will not change in IIS standard and not in version 7.

Note:

I believe that status codes cannot be customized: 400, 403.9, 411, 414, 500, 500.11, 500.14, 500.15, 501, 503 and 505.

_{https://technet.microsoft.com/en-us/library/cc753103%28v=Ws.10%29.aspx? f=255&Mspperror=-2147217396}

If it doesn’t work just try:

<error statusCode="401" path="/sys/error.php" responseMode="ExecuteURL" />

And instead of using _GET use the function http_response_code() (requires php5.4+) do this on your php error.:

<?php
echo http_response_code();