system/HTTP/Request.php
public function getEnv($index = null, $filter = null, $flags = null)
	{
		return $this->fetchGlobal('env', $index, $filter, $flags);
	}
public function getEnv($index = null, $filter = null, $flags = null)
	{
		return $this->fetchGlobal('env', $index, $filter, $flags);
	}
Fetch an item from the $_ENV array.

@param null $index  Index for item to be fetched from $_ENV
@param null $filter A filter name to be applied
@param null $flags

@return mixed