Setting variables in PHP class

I've inherited a bit of code that is used to integrate with a third party (Highrise CRM). I'm a bit rusty on this side of PHP, so was looking for some help.

I want to assign a session variable within a class. At the moment I have the following code:

var $highrise_url = 'https://exam开发者_高级运维ple.highrisehq.com';
var $api_token = 'foofoofoofoofoofoofoofoo';
var $task_assignee_user_id = 'foofoo';

But I want the URL, token and ID to be set based on the session valuables I pull from the database of the user who is logged in i.e.

$_SESSION['hrurl']
$_SESSION['hrapi']
$_SESSION['hrid']

The class uses the variables set above in functions like:

$curl = curl_init($this->highrise_url.'/deals.xml');

I know that I CAN'T set a variable in a class like this:

var $highrise_url = $_SESSION['hrurl'];

So how do I do it?

I believe it's done by using the construct function, but I'm shaky at best, so would appreciate help :o)

Many thanks,

Gregor

---

Sounds like a job for the constructor:

class A
{
    public $highrise_url;
    public $api_token;
    public $task_assignee_user_id;

    public function __construct()
    {
        $this->highrise_url = $_SESSION['hrurl'];
        $this->api_token = $_SESSION['hrapi'];
        $this->task_assignee_user_id = $_SESSION['hrid'];
    }
}

$a = new A();

A better solution may be to pass the values to the constructor:

public function __construct($highrise_url, $api_token, $task_assignee_user_id)
{
    $this->highrise_url = $highrise_url;
    $this->api_token = $api_token;
    $this->task_assignee_user_id = $task_assignee_user_id;
}

...

$a = new A($_SESSION['hrurl'], $_SESSION['hrapi'], $_SESSION['hrid']);

The second way cuts down on coupling between your class and the $_SESSION array. That way you can use (or test) the class without relying on session functionality.

---

Set it in the constructor:

class HighriseClass {
  var $highrise_url;

  function __construct() {
    $this->highrise_url = $_SESSION['hrurl'];
  }
}