Manual:$wgRequest

Overview
  is used as a global singleton that contains an instance of the  class. The WebRequest class encapsulates getting at data passed in the URL or via a POSTed form, handling removal of "magic quotes" slashes, stripping illegal input characters and normalizing Unicode sequences. See the  class documentation and  for more details.

Examples
This code can be useful within hooks>Special:MyLanguage/Manual:Hooks|hook functions when you want to return without executing additional function code if the user is editing, rather than viewing, the current page.

Deprecation
evil>Special:MyLanguage/Manual:Globals are evil|As with other globals, the use of   should be avoided when alternative methods are available. For example, when writing a special>Special:MyLanguage/Manual:Special pages|special page, use the   method provided by the SpecialPage</> class, e.g.:

Hook functions
When you work with various hooks you can usually get the WebRequest object from the context, for example:

Special pages
In a special page context, one can use.

API modules
In an API module context, one can use.