system/HTTP/IncomingRequest.php
public function getVar($index = null, $filter = null, $flags = null)
	{
		return $this->fetchGlobal('request', $index, $filter, $flags);
	}
public function getVar($index = null, $filter = null, $flags = null)
	{
		return $this->fetchGlobal('request', $index, $filter, $flags);
	}
Fetch an item from the $_REQUEST object. This is the simplest way
to grab data from the request object and can be used in lieu of the
other get* methods in most cases.

@param string|array|null $index
@param integer|null      $filter Filter constant
@param mixed             $flags

@return mixed