Using an abstraction layer in a class

[OhLordy]

How do I use an abstraction layer in a class if the layer is not really extended by the other class, or am I missing the poiint?

I have created a MySQL abstraction layer and am wanting to use this in my cart class but am not sure how to.

<?

require '../content/MySQL/mysqlClass.php';

class cartClass
{
	var $tran;
	var $item;
	var $db;

function cartClass()
{
	$db = new mysqlClass();
	$this->db->insertTransaction();
}}

Sorry if I'm not explaining well.
Thanx in advance
Rob

[sijis]

i don't know much about classes, but that is exactly what i would do, just include the class in the other class and use it regularly. I'm also pretty sure that isn't the right way to do it, but it might just work. 🙂

when you try what you have, what do you get?
maybe you do have to extend the class in order for it to work...

[alanzhao]

<?

require '../content/MySQL/mysqlClass.php';

class cartClass
{
	var $tran;
	var $item;
	var $db;

function cartClass()
{
	$db = new mysqlClass();
	$this->db->insertTransaction();
}}

should it be

<?

require '../content/MySQL/mysqlClass.php';

class cartClass
{
	var $tran;
	var $item;
	var $db;

function cartClass()
{
	$this->db = new mysqlClass();
	$this->db->insertTransaction();
}}

[sijis]

i believe

$this->var is the same as saying
$var if you are doing it withing the class.
now if you are modifying outside the class i guess you would use
$that->var
no? or at least something similar.

btw, alanzhao, i didn't notice that $this->var the first time. haha 🙂