Windows Azure Cloud Service or Web Site: Where am I Deployed?

app.js

switch (process.env.WhereAmI.toLowerCase())
{
  case "cloud":
     //...
  break;
  case "websites":
     //...
  break;
  case "local":
     //...
  break;
}

appSettings.cs

var appSettings = System.Configuration.ConfigurationManager.AppSettings;
var whereAmI = appSettings["WhereAmI"];

switch(whereAmI)
{
    case "local": 
        goto default; // make local as the default action
    break;
    case "websites":
        //...
    break;
    case "cloud":
        //...
    break;
    default:
        //...
}

index.php

<?php

switch (strtolower(getenv('WhereAmI')))
{
  case "cloud":
     //...
  break;
  case "websites":
     //...
  break;
  case "local":
     //...
  break;
}

?>

ServiceDefinition.csdef

<ServiceDefinition name="MyService" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceDefinition">
   <WebRole name="WebRole1">
      <Runtime>
         <Environment>
            <Variable name="WhereAmI" value="cloud" />
         </Environment>
      </Runtime>     
   </WebRole>
</ServiceDefinition>

web.cloud.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <appSettings xdt:Transform="Replace">
     <add key="WhereAmI" value"cloud" />
  </appSettings>
  <!-- //... -->
</configuration>

web.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
     <add key="WhereAmI" value"websites" />
  </appSettings>
  <!-- //... -->
</configuration>

web.local.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <appSettings xdt:Transform="Replace">
     <add key="WhereAmI" value"local" />
  </appSettings>
  <!-- //... -->
</configuration>

web.websites.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <appSettings xdt:Transform="Replace">
     <add key="WhereAmI" value"websites" />
  </appSettings>
  <!-- //... -->
</configuration>