Re: [development] Add data to Drupal session

Short answer: you can't. Even if you are able to serialize your class, I'm sure the class contains resources (http://www.php.net/manual/en/language.types.resource.php) and these cannot be serialized nor stored in $_SESSION. Some resources can be persistent but I think that's only possible with PHP extensions aka C code. I'm sure there are other possible solutions, including a running process/service on the server to which either your module can talk. On Tue, Dec 8, 2009 at 5:42 PM, Salvatore De Paolis <iwkse@gmx.com> wrote:

Hi,

I'm new to this mailing list, I hope is the right place to ask for such questions. I'm writing a module for drupal which implements a jabber client and hooks in the appbar module. The issue i'm having now is regarding the data used for jabber communication. I'm using a jabber class and I need to store this object somewhere so that the _init code is just executed one time. I thought about sessions and I found a couple of ways, both don't works properly for me.

First is using the global $user:

function jwclient_jabberclass_init() {   global $user;   if (!isset($user->jabclient) && $user->uid) {       require_once('jabber.php');       ...       $jab = New Jabber($debug);       $jabclient = New JabberClient($jab);       $jabclient->jabber_client_set_user($user);       ...       user_save($user, array('jabclient' => $jabclient));   } } function jwclient_init() {  jwclient_jabberclass_init();  ... } function theme_jwclient_chat () {  global $user;  return $user->jabclient->status; }

This solution gives me an errors of __PHP_Incomplete_Class Object. Googling in understood that a proper way to save classes in session is to fistly define the class and than call session_start. I don't see ways to achieve this since the class I'm using is defined in a module and the drupal session is already initiated. A workaround i found on drupal.org is by using serialize/unserialize but it doesn't work around for this case. I changed the code in this way:

function jwclient_jabberclass_init() {   global $user;   if (!isset($user->jabclient) && $user->uid) {       require_once('jabber.php');       ...       $jab = New Jabber($debug);       $jabclient = New JabberClient($jab);       $jabclient->jabber_client_set_user($user);       ...       $jabclient = serialize($jabclient);       user_save($user, array('jabclient' => $jabclient));   } } function jwclient_init() {  jwclient_jabberclass_init();  ... } function theme_jwclient_chat () {  global $user;  $jabclient = $user->jabclient;  $jabclient = unserialize($jabclient);  return $user->jabclient->status; } The result is: warning: unserialize() expects parameter 1 to be string, object given

After this, i give away $user and tried with $_SESSION

function jwclient_jabberclass_init() {   global $user;   if (is_null($_SESSION['jabclient']) && $user->uid) {       require_once('jabber.php');       ...       $jab = New Jabber($debug);       $jabclient = New JabberClient($jab);       $jabclient->jabber_client_set_user($user);       ...       $_SESSION['jabclient'] = serialize($jabclient);   } } function jwclient_init() {  jwclient_jabberclass_init();  ... } function theme_jwclient_chat () {  $jabclient = unserialize($_SESSION['jabclient']);  return $jabclient->status; } This attempt works on the first call. On the second call I get again the error about __PHP_Incomplete_Class Object.

I'm out of clue now. Anyone know how to manage the case of storing objects in session with drupal?

Thanks, Salvatore