مشکل در آرایه های سبد خرید

[navid3d_69]

سلام من با این کلاس می خوام سبد خرید درست کنم و برای هر سطح محصولات جدا

مثلا محصولات مربوط به pro1 جدا pro2 و... همه جدا






<?php

class Cart
{
///////////////////
// PROPERTIES
///////////////////
/*
* id of product
* @var int
*/
public $id;

/*
* num of product
* @var int
*/
public $num;

/*
* unit price of product (fee فی فروش)
* @var int
*/
public $unit;

/*
* adress of thumb image of product
* @var string
*/
public $thumb='';


/*
* the sum of whole the products price in cart
* @var int
*/
public $total;

/*
* errors stors in this property
* you can access to errors with getErrors method
* @array
* @access private
*/
private $errors=array();

public $type;
/*
* for storing values of item in array
* @array
* @access private
*/
private $arr=array();

///////////////////
// METHODS
///////////////////

/*
* if id is repetitive, upadate num or unit of product
* else add item (id, num, unit, totalItem, thumb) of product in cart
* @ return true if succeed
* @ else return false and you can use getErrors() for finding errors
*/
public function save ()
{
// for set id, num, ... in array
$this->toArray();
if($this->arr['id']==0 or $this->arr['num']==0)
{
$this->errors[]='id or num cannt be equal 0';
}
if(count($this->errors)==0)
{
$_SESSION['cart'][$this->type]=array(
'id' =>$this->arr['id'],
'num'=>$this->arr['num'],
'unit'=>$this->arr['unit'],
'totalItem'=>$this->arr['num']*$this->arr['unit'],
'thumb'=>$this->arr['thumb'],
);
$this->setTotal();
return true;
}
else
return false;

}

/*
* for remove a item from cart
* @params int $id
* @ return true if succeed
* @ else return false and you can use getErrors() for finding errors
*/
public function destroy ($id)
{
if(isset($_SESSION['cart'][$id]))
{
unset($_SESSION['cart'][$id]);
$this->setTotal();
return true;
}
else
{
$this->errors[]='there is no id that you want to remove in cart';
return false;
}
}

/*
* remove whole of items in cart
*/
public function destroyAll ()
{
unset($_SESSION['cart']);
}

/*
* getAll items in cart
* you can set one three kind in $dataType to export. array, xml, json
* @return items in cart
* @return array (0=>array(id=>array(num=>num,price=>price,totalItem=>totalItem,thumb=>thumb)),1=>...)
* @return json
* @return xml
*/
public function getAll ($dataType='array')
{
if(isset($_SESSION['cart']))
{
switch (strtolower ($dataType) )
{
case 'json':
return json_encode($_SESSION['cart']);
break;
case 'array':
default :
return $_SESSION['cart'];
break;
}
}
else
{
$this->errors='cart is empty';
return $this->getErrors();
}
}

/*
* get information(num, price, totalItem, thumb) about product in cart with id
* @params int $id
* @return array (num=>num,price=>price,totalItem=>totalItem,thumb=>thumb)
*/
public function getById($id)
{
if(isset($_SESSION['cart'][$id]))
return $_SESSION['cart'][$id];
else
{
$this->errors='undifinde id='.$id.' in cart';
return $this->getErrors();
}
}

/*
* set the value requires for items
* @param array $arr(id=>id,num=>num,price=>price,thumb=>thumb)
*/
public function set ($arr,$type)
{
$arr=array_merge($this->toArray(),$arr);
$this->type = $type;
$this->id=$arr['id'];
$this->num=$arr['num'];
$this->unit=$arr['unit'];
$this->thumb=$arr['thumb'];
}

/*
* if occur errors, with this method you can know about errors
* @return errors
*/
public function getErrors ()
{
return $this->errors;
}

/*
* set value in array
* @ return array of information about item
* @ access private
*/
private function toArray()
{
return $this->arr=array
(
'id'=>(int) $this->id,
'num'=>(int) $this->num,
'unit'=>(int) $this->unit,
'thumb'=> $this->thumb,
);
}

/*
* calculate the total of price products in cart
* you can access total by total property ($this->total)
* @ set total in total property
* @ access private
*/
private function setTotal ()
{
$this->total=0;
foreach($_SESSION['cart'] as $arr)
{
$this->total +=$arr['totalItem'];
}
}
}





حالا مشکلی که داره اینه که فقط یک بار سشن هارو درست می کنه


یعنی با این کد





<?php
session_start();
require 'Class/Cart.php';



$cart = new Cart();
$cart->destroyAll();
$cart->set(array(
'id' =>3,
'num' => 2,
'unit' => 3
),'pro1');
$cart->save();
$cart->set(array(
'id' =>1,
'num' => 2,
'unit' => 3
),'pro2');

$cart->set(array(
'id' =>2,
'num' => 2,
'unit' => 3
),'pro2');

$cart->save();

echo '<pre>';
print_r($cart->getAll());
echo '</pre>';
?>




این خروجی رو میده



Array
(
[pro1] => Array
(
[id] => 3
[num] => 2
[unit] => 3
[totalItem] => 6
[thumb] =>
)

[pro2] => Array
(
[id] => 2
[num] => 2
[unit] => 3
[totalItem] => 6
[thumb] =>
)

)




و مثلا مقدار pro2 باید 2تا آیدی ازش اضافه بشه ولی آیدی آخر که ست شده فقط اضافه میشه

من هر کاری کردم نشد حلش کنم لطفا کمک کنید ممنون

[navid3d_69]

کسی نمی تونه راهنمایی کنه؟