HttpHeaders::get

public function get($name, $returnArray = false)
{
	$nameLower = strtolower($name);

	if (isset($this->headers[$nameLower]))
	{
		if ($returnArray)
		{
			return $this->headers[$nameLower]['values'];
		}

		return $this->headers[$nameLower]['values'][0];
	}

	return null;
}