library/core/class.request.php
public function Get($Key = NULL, $Default = NULL) {
      if ($Key === NULL)
         return $this->GetRequestArguments (self::INPUT_GET);
      else
         return $this->GetValueFrom(self::INPUT_GET, $Key, $Default);
   }
public function Get($Key = NULL, $Default = NULL) {
      if ($Key === NULL)
         return $this->GetRequestArguments (self::INPUT_GET);
      else
         return $this->GetValueFrom(self::INPUT_GET, $Key, $Default);
   }
public function Get ( $ Key = NULL , $ Default = NULL ) { if ( $ Key === NULL ) return $ this -> GetRequestArguments ( self :: INPUT_GET ) ; else return $ this -> GetValueFrom ( self :: INPUT_GET , $ Key , $ Default ) ; }
Get a value from the GET array or return the entire GET array.

@param string|null $Key The key of the get item or null to return the entire get array.
@param mixed $Default The value to return if the item isn't set.
@return mixed
Get a value from the GET array or return the entire GET array .