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<?php
/*
// Ken's Cart Class v2.1a;
//
// Purpose: Cart who's items can have any number of attributes
// Added the ability to create multiple carts ie (cart/wishlist)
//
// $cart = new Cart; // create a new cart object
// $item = array('id'=>132,'qty'=>'1','color'=>'blue','size'=>'large'); // create a new item array - ID is required
// $cart->AddItem($item); // new item will be added (cart has 1 item)
// $item['qty'] += 2; // now the item qty equals 3;
// $cart->AddItem($item); // since qty=3 it updates the qty rather than add 3 more items
// $item['color'] = 'white'; // now the color is different
// $cart->AddItem($item); // since this does not match any other cart item a new item will be added;
// $cart->RemoveItem(0); // remove the first item from the cart
// $cart->UpdateItem(0,array('color'=>'yellow')); now the color of the item will be yellow
// $cart->ClearCart(); // empty the cart
// $cart->DumpCart(); // dump the cart for test viewing
// $cart_contents = $cart->GetCart(); // get the cart for processing
// foreach($cart_contents as $cart_item)
// echo $cart_item['id']; // output all the cart id's
// now you can have multiple carts just by changing the name
*/
class Cart {
private $cart;
private $cart_name;
function __construct($cart_name=null) {
$this->cart_name = !is_null($cart_name) ? $cart_name : 'cart';
$this->cart = isset($_SESSION[$this->cart_name]) ? $_SESSION[$this->cart_name] : array(); // new cart or retrieve old cart
}
public function setCart($cart_name) {
$this->cart_name = $cart_name;
}
public function updateItem($id,$attribs) {
foreach($attribs as $k => $v) { // go through all the new attributes
if(!isset($v)) // if attribute has empty value
unset($this->cart[$id][$k]); // remove it from the item
else
$this->cart[$id][$k] = $v; // otherwise update it
}
$this->updateCart(); // resave session
}
public function clearCart() {
$this->cart = array(); // empty array
$this->updateCart(); // resave to session
}
public function addItem($attribs) {
$flag = false; // matching flag - see if it is an update to an item
$n = 0; // counter
if(!isset($attribs['id'])) return; // an id is required
if(!isset($attribs['qty']) || $attribs['qty'] < 1) $attribs['qty'] = 1; // should supply the qty but if not 1 is default
foreach($this->cart as $k) { // go through the entire cart
if($k['id'] == $attribs['id'] && count($k) == count($attribs)) { // if they have the same id and the same number of attributes
$matched = array_intersect_assoc($attribs,$k); // get key value pairs that match
if(isset($matched['qty'])) { // if qty was the same in both arrays
if(count($matched) == count($k)) { // see if it matches the newly submitted item
$flag = true; // if they match set the flag
break; // break out of the foreach
} // end if
} else { // is it the same item with a different qty?
if(count($matched)+1 == count($k)) { // are they the same size (matched does not have qty though so +1)
$flag = true; // if they match set the flag
break; // break out of the foreach
} // end if
} // end if/else
} // end if
$n++; // increment cart position
} // end foreach
if($flag) { // if flag is true
if($attribs['qty']>=2) // if the qty is more than one
$this->cart[$n]['qty'] = $attribs['qty']; // just set it to the new qty
else
$this->cart[$n]['qty'] += $attribs['qty']; // add the new qty
$this->updateCart(); // save the cart to the session
return; // return nothing
}
array_push($this->cart,$attribs); // add a new item to the cart
$this->updateCart(); // save the cart to the session
return; // at the end but why not return
}
public function removeItem($arrayIndex) {
unset($this->cart[$arrayIndex]); // remove the item
$this->cart = array_values($this->cart); // update the indexes
$this->updateCart(); // save the cart to the session
return;
}
public function updateCart() {
$_SESSION[$this->cart_name] = $this->cart; // resave the cart to the session
}
public function getCart() {
return $this->cart; // return the cart for outside processing
}
public function dumpCart() {
var_dump($this->cart); // dump the cart for testing
}
public function isEmpty() {
return count($this->cart) ? 0 : 1; // whether the cart is empty or not
}
public function itemCount() {
$qty=0;
foreach($this->cart as $k) $qty += $k['qty'];
return $qty;
}
public function uniqueItemCount() {
return count($this->cart);
}
public function getSerialized() {
return serialize($this->cart);
}
}
?>