Datamanager inside a class

[budlight]

Hi I'm trying to write a class to use the Datamanager. This will actually be part of a plugin to my existing system. So far all plugins are defined as classes. I have this code so far:

PHP Code:

<?php
 define('SKIP_SESSIONCREATE', 1);
 define('DIE_QUIETLY', 1);
 define('THIS_SCRIPT', 'test');
 define('CWD', $_SERVER['DOCUMENT_ROOT'].'/4um');
 require_once($_SERVER['DOCUMENT_ROOT'].'/4um/global.php');
 
class externalVB {
  public $vB_forumid    =    12;
  public $vB_postuserid = 1;
  public $vB_userid = 1;
  public $vB_username = 'Budlight';
  public $vB_pagetext = 'test';
  public $vB_title    =    'hello';
  public $vB_allowsmilie    =    '1';
  public $vB_visible    =    '1';
  
     function __construct() {
  }

     function    create_new_thread($vB_username)    {
     
     
     global $vbulletin;

     $vB_threaddm =& datamanager_init('Thread_FirstPost', $vbulletin, ERRTYPE_STANDARD, 'threadpost');
     #$vB_threaddm = new vB_DataManager_Thread_FirstPost($vbulletin, ERRTYPE_STANDARD);

 
     $vB_threaddm->do_set('forumid',    $this->vB_forumid);
     $vB_threaddm->do_set('postuserid', $this->vB_postuserid);
     $vB_threaddm->do_set('userid', $this->vB_userid);
     $vB_threaddm->do_set('username', $this->vB_username);
     $vB_threaddm->do_set('pagetext', $this->vB_pagetext);
     $vB_threaddm->do_set('title',    $this->vB_title);
     $vB_threaddm->do_set('allowsmilie',    $this->vB_allowsmilie);
     $vB_threaddm->do_set('visible',    $this->vB_visible);

  $vB_result= $vB_threaddm->save();
 

    return $vB_result;
    }
}


if(!empty($_GET["addThread"])) {
$a = new externalVB();    
echo $a->create_new_thread('Budlight');
}
                
            

?>

However I can't figure out how to move the require_once to be called in the constructor of the class. It really has to be this way but once I do it I get:

Warning: array_keys() [function.array-keys]: The first argument should be an array in /includes/functions.php on line 3699

Warning: Invalid argument supplied for foreach() in /includes/functions.php on line 3699

Fatal error: Call to a member function query_read_slave() on a non-object in /home/cyclecha/public_html/4um/includes/functions.php on line 2772

Like shown though with the require outside the class, it works fine.