Object Programming in PHP

[budlight]

I'm making an external script to post to a vBulletin forum. I pretty much need to do it an existing class. The problem is I need to require global.php within the class itself. This script errors when I move the require to inside the constructor. I have no clue why.

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');
 
 #looks like we can simply pass the forum directory to this script and make all operations according to get/posts on this script.  Kind of ++++ed but what can you do?
 #this script will need to be secured from unauthorized users making a post to it. 
 
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');
                    }
                
            
            




?>

[YopY]

imho, this article doesn't even begin to explain object-oriented programming in PHP.

@budlight, it would help if you copy / pasted the error here.