List some Environment Variables of Slim Framework?

Below is the list of Environment Variables that are available in Slim Framework

• Request_Method – This is the HTTP request method and is particularly required and cannot be empty.
• Script_Name – The request URI’s path of which the initial portion relates to the particular physical directory in which the installation of the Slim application is done. It can be even empty. There will be never a trailing slash in it.
• Query_String – It does not include the ‘?’ of the HTTP Request’s URI. It may be an empty string.
• Server_Name – After combining with Script_Name and Path_Info it can be conveniently used to make a completely qualified URL to an application resource. It will never be an empty string.
• Server_Port – After combining with Script_Name and Path_Info, it can be castoff to produce a fully qualified URL to any of the application resources. This will also never be an empty string.