This is a nifty little shopping cart I made. Fully customizable.
By : voldomazta
<?php
/**
* + Shopping Cart Class
* + (c) 2006 Ramon Alivio Jr. (http://www.ramon.ph)
* + on 2006-08-03
**/
class Cart extends Site {
/**
* The serialized array of items
* @var string
**/
var $items;
/**
* The name of the cart
* @var string
**/
var $CART_NAME;
/**
* void Cart
* + Instantiates the class, sets the cart name
* + to your cart name and sets the items array for use
* -----
* @param string : The name of the cart
**/
function Cart($cn)
{
if (empty($cn)) return false;
$this->CART_NAME = preg_replace("/([^a-zA-Z|\s]+)/","",$cn);
if (!empty($_COOKIE[$this->CART_NAME])) {
$this->items = base64_decode($_COOKIE[$this->CART_NAME]);
$this->items = unserialize($this->items);
} else {
$this->items = array();
}
}
/**
* void add_item
* + This function adds the items to the shopping cart array
* + and serializes them
* -----
* @param int : ID of the item
* @param string : Name of the item
* @param int : Quantity of the item
* @param double : Price of the item
* @param string : Additional Notes
**/
function add_item($id, $n, $q, $p, $an='')
{
if ($this->is_zero($id, $q, $p) || empty($n)) return;
if ($this->in_cart($id)) $this->items[$id]['quantity'] += $q;
else $this->items[$oid] = array('id' => $id, 'name' => $n, 'quantity' => $q, 'price' => $p, 'notes' => $an);
$this->update_cart();
}
/**
* void remove_item
* + This function removes an item from the cart with the
* + specified "id" and "quantity" and updates the cart afterwards
* -----
* @param int : ID of the item to be removed
* @param int : Quantity of the item to be removed
**/
function remove_item($id, $q)
{
$cq = $this->items[$id]['quantity'];
if (!$this->in_cart($id)) return;
if ($q > $cq) $this->items[$id]['quantity'] = 0;
else $this->items[$id]['quantity'] -= $q;
if ($cq == 0) unset($this->items[$id]);
$this->update_cart();
}
/**
* void update_quantity
* + This function updates the quantity of a given item
* + with the specified "id" and quantity", if the given
* + quantity is 0 or less, the item is removed from the cart
* -----
* @param int : ID of the item to be updated
* @param int : New quantity of the item
**/
function update_quantity($id, $nq)
{
if (!$this->in_cart($id)) return;
$this->items[$id]['quantity'] = $nq;
$this->update_cart();
}
/**
* boolean in_cart
* + This function returns whether the given item exists
* + on the shopping cart
* -----
* @param int : ID of the item to be checked
**/
function in_cart($id)
{
return is_array($this->items[$id]) ? true : false;
}
/**
* int item_count
* + This item returns the total number of items in the cart
* -----
* @param
**/
function item_count()
{
$count = 0;
foreach ($this->items as $v) $count += $v['quantity'];
return $count;
}
/**
* void update_cart
* + This function updates the shopping cart, if a certain
* + quantity for an item is 0, it removes it from the cart
* -----
* @param
**/
function update_cart()
{
foreach ($this->items as $k=>$v) if ($v['quantity'] == 0) unset($this->items[$k]);
$temp = base64_encode(serialize($this->items));
setcookie($this->CART_NAME,'',time()-1);
setcookie($this->CART_NAME,$temp,time()+30*24*60*60);
}
/**
* double total_price
* + This function returns the total price of all the items
* + in the cart
* -----
* @param
**/
function total_price()
{
$total = 0;
foreach ($this->items as $v) $total += $v['quantity']*$v['price'];
return $total;
}
/**
* void empty_cart
* + This function empties the shoppig cart of all its items
* -----
* @param
**/
function empty_cart()
{
foreach ($this->items as $k=>$v) unset($this->items[$k]);
$this->update_cart();
}
/**
* boolean is_zero
* + This function checks whether there is a 0 value
* + from all the arguments given to it
* -----
* @param mixed : Set of numbers => is_zero(3,0,2)
**/
function is_zero()
{
foreach (func_get_args() as $arg) if ((int)$arg != 0) return false;
return true;
}
}
?>
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