piggy
更新時間：2009/8/10 上午 05:00:38

第18-10頁裡的wfcart.php書上只有使用物件的方法 可以針對該檔案提供一般程式碼後面的程式說明嗎??因為看了幾次還是不太懂 謝謝

class wfCart {
var $total = 0;
var $itemcount = 0;
var $items = array();
var $itemprices = array();
var $itemqtys = array();
var $iteminfo = array();

function cart() {} // constructor function

function get_contents()
{ // gets cart contents
$items = array();
foreach($this->items as $tmp_item)
{
        $item = FALSE;

$item['id'] = $tmp_item;
                        $item['qty'] = $this->itemqtys[$tmp_item];
$item['price'] = $this->itemprices[$tmp_item];
$item['info'] = $this->iteminfo[$tmp_item];
$item['subtotal'] = $item['qty'] * $item['price'];
                        $items[] = $item;
}
return $items;
} // end of get_contents


function add_item($itemid,$qty=1,$price = FALSE, $info = FALSE)
{ // adds an item to cart
                if(!$price)
{
        $price = wf_get_price($itemid,$qty);
}

                if(!$info)
{
                        $info = wf_get_info($itemid);
}

if($this->itemqtys[$itemid] > 0)
                { // the item is already in the cart..
  // so we'll just increase the quantity
$this->itemqtys[$itemid] = $qty + $this->itemqtys[$itemid];
$this->_update_total();
} else {
$this->items[]=$itemid;
$this->itemqtys[$itemid] = $qty;
$this->itemprices[$itemid] = $price;
$this->iteminfo[$itemid] = $info;
}
$this->_update_total();
} // end of add_item


function edit_item($itemid,$qty)
{ // changes an items quantity

if($qty < 1) {
$this->del_item($itemid);
} else {
$this->itemqtys[$itemid] = $qty;
// uncomment this line if using
// the wf_get_price function
// $this->itemprices[$itemid] = wf_get_price($itemid,$qty);
}
$this->_update_total();
} // end of edit_item


function del_item($itemid)
{ // removes an item from cart
$ti = array();
$this->itemqtys[$itemid] = 0;
foreach($this->items as $item)
{
if($item != $itemid)
{
$ti[] = $item;
}
}
$this->items = $ti;
$this->_update_total();
} //end of del_item


        function empty_cart()
{ // empties / resets the cart
                $this->total = 0;
        $this->itemcount = 0;
        $this->items = array();
                $this->itemprices = array();
        $this->itemqtys = array();
                $this->iteminfo = array();
} // end of empty cart


function _update_total()
{ // internal function to update the total in the cart
        $this->itemcount = 0;
$this->total = 0;
                if(sizeof($this->items > 0))
{
                        foreach($this->items as $item) {
                                $this->total = $this->total + ($this->itemprices[$item] * $this->itemqtys[$item]);
$this->itemcount++;
}
}
} // end of update_total
}
?>

文淵閣工作室
更新時間：2009/8/12 上午 10:45:45

可否指出不懂的地方，我們再來說明。