user_agent.php
public function setCookie($name, $value, $host = false, $path = '/', $expiry = false)
    {
        $this->cookie_jar->setCookie($name, $value, $host, $path, $expiry);
    }
public function setCookie($name, $value, $host = false, $path = '/', $expiry = false)
    {
        $this->cookie_jar->setCookie($name, $value, $host, $path, $expiry);
    }
Sets an additional cookie. If a cookie has the same name and path it is replaced.

@param string $name            Cookie key.
@param string $value           Value of cookie.
@param string $host            Host upon which the cookie is valid.
@param string $path            Cookie path if not host wide.
@param string $expiry          Expiry date.