public function getHeader($key)
	{
		$key = strtolower($key);

		return isset($this->headers[$key]) ? $this->headers[$key] : null;
	}
public function getHeader($key)
	{
		$key = strtolower($key);

		return isset($this->headers[$key]) ? $this->headers[$key] : null;
	}
public function getHeader ( $ key ) { $ key = strtolower ( $ key ) ; return isset ( $ this -> headers [ $ key ] ) ? $ this -> headers [ $ key ] : null ; }
Get a specific header from the request.

@param  string $key

@return mixed
Get a specific header from the request .