system/HTTP/Response.php
protected function sendCookies()
	{
		if ($this->pretend)
		{
			return;
		}

		foreach ($this->cookies as $params)
		{
			// PHP cannot unpack array with string keys
			$params = array_values($params);

			setcookie(...$params);
		}
	}
protected function sendCookies()
	{
		if ($this->pretend)
		{
			return;
		}

		foreach ($this->cookies as $params)
		{
			// PHP cannot unpack array with string keys
			$params = array_values($params);

			setcookie(...$params);
		}
	}
Actually sets the cookies.