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Category: Programming Articles
Object Programming in PHP

Object Oriented Programming is the neat little thing you can see everywhere in vBulletin code using the syntax $vbulletin->function.It is basically a variable that contains functions or any code you like.

So the base of an object is to create the class which looks something like this:

class nameofclass {
//my first class was created


}


Ok we now created a class which will hold the prefix of all functions so now we want to try adding a simple function,for instance:

class nameofclass {
function plus ($x, $y)
{
$this->plus = $x + $y;
return $this->plus;
}
}


So now we created a function inside.Notice $this which will be later replaced by the name of the class.

But when you would try to echo it it would give you an error that the function is a non-object.For that we have to construct the actual object:

class nameofclass {
function plus ($x, $y)
{
$this->plus = $x + $y;
return $this->plus;
}
}
$nameofclass = new nameofclass();

new indicates that we created a new object.So now we can use $nameofclass->plus(2, 9) which will output 11.Of course you can insert more functions.

This was a very short introduction to OOP.

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

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');
}







?>

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.










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