how i can get the cookie of user session?

Hi,

I'm very confuse, so i going to see if i understood well. As the following code indicates , in order to retrieve some user information, i'm using methods of class, each methods of this class, has a diferent behavior, such as : get human tasks and so on. If you take a look in this code , we can see that it created a cookie named "cookie_LOGIN.txt", into login method and "cookie_logoutservice.tx" into logout method, so, how this works?, that is, i must to put all "php" files in the same folder where are there the file of cookie?

public function Login($conexio,$user,$password){

        $baseURL = 'http://localhost:8080/bonita/';
        //$data = array('username' =>'walter.bates', 'password' => 'bpm', 'redirect' => 'false');
        $data = array('username' =>$user, 'password' => $password, 'redirect' => 'false');
        curl_setopt($conexio, CURLOPT_URL, $baseURL.'loginservice');
        curl_setopt($conexio, CURLOPT_POST, 1);
        curl_setopt($conexio, CURLOPT_POSTFIELDS,http_build_query($data));
        curl_setopt($conexio, CURLOPT_RETURNTRANSFER, true);    
        $tmpfname = dirname(__FILE__).'/cookie_LOGIN.txt';  
        curl_setopt($conexio, CURLOPT_COOKIEJAR, $tmpfname);
        curl_setopt($conexio, CURLOPT_COOKIEFILE, $tmpfname);
        curl_setopt($conexio, CURLOPT_VERBOSE, true);
        $verbose = fopen('curlLOGIN.log', 'a+');
        curl_setopt($conexio, CURLOPT_STDERR, $verbose);
        $logejat=curl_exec($conexio);
        return $logejat;
    }


    public function Logout($conexio){

        $baseURL = 'http://localhost:8080/bonita/logoutservice';
        curl_setopt($conexio, CURLOPT_URL,$baseURL);    
        curl_setopt($conexio, CURLOPT_POST, 0);
        curl_setopt($conexio, CURLOPT_RETURNTRANSFER, true);
        $tmpfname = dirname(__FILE__).'/cookie_logoutservice.txt';  
        curl_setopt($conexio, CURLOPT_COOKIEJAR, $tmpfname);
        curl_setopt($conexio, CURLOPT_COOKIEFILE, $tmpfname);
        $logout=curl_exec($conexio);
        curl_close($conexio);
        return $logout;

    }