refrence
http://codereview.stackexchange.com/questions/25671/my-perfect-shopping-cart-class
Easy way is copy this code to your php editor.
1、const ID, QTY for column name, it's can change by yourself.
2、session only check isset.
3、array_push_after() maybe use not good way.
4、$item from CartItemtoArray(), this is array(). not class object.
5、getIndexOfEntry() try to get Array $container at index.
So use Array to control, no Object. Becasue I don't know refrence, answer 1 and 2, How to create item add in cart. ID is key. Answer 1 can run, answer 2 is broken.
How to use：
Normal：
$cart = new SessionCart();
$item = cart->CartItemtoArray(1234); //item_id = 1234
$cart->add($item);
//then control shopping cart by method
Advance： put item desciption into $item array for count or outprint
$cart = new SessionCart();
$item_other = array("item_name"=>"apple", "item_price"=>10, "item_weight"=>0.5);
$item = cart->CartItemtoArray(1234,
$item_other ); //item_id = 1234
$cart->add($item);
//then control shopping cart by method
class SessionCart {
const ID = "item_id";
const QTY = "quantity";
protected $container;
public function __construct($storageIndex = "_CART_") {
if (is_null($this->container)) {
//if (session_id() == '') {
// session_start();
//}
if (!isset($_SESSION[$storageIndex])) {
$_SESSION[$storageIndex] = array();
}
$this->container =
&$_SESSION[$storageIndex];
}
//$this->container = &$container;
}
public function CartItemtoArray($item_id, $others=array(), $qty=1){
$qty = ($qty < 1)?1:$qty;
$rt = array(self::ID=>$item_id, self::QTY=>$qty);
foreach($others as $key => $value){
$rt = array_push_after($rt, array("$key"=>$value), 0);
}
return $rt;
}
public function add($item, $quantity=1) {
$index = $this->getIndexOfEntry($item);
if ($index == -1) {
//$item[self::QTY] += $quantity; //第一次不用補上
$this->container[] = $item;
} else {
$this->container[$index][self::QTY] += $quantity;
return $this->container[$index][self::QTY];
}
}
public function remove($item) {
$index = $this->getIndexOfEntry($item);
unset($this->container[$index]);
}
public function getQuantity($item) {
$index = $this->getIndexOfEntry($item);
return $index == -1 ? 0 : $this->container[$index][self::QTY];
}
public function setQuantity($item, $quantity) {
$quantity = (int)$quantity;
if ($quantity < 1) {
$this->remove($item);
return;
}
$index = $this->getIndexOfEntry($item);
if ($index == -1) {
$item[self::QTY] = $quantity;
$this->container[] = $item;
} else {
$this->container[$index][self::QTY] = $quantity;
}
}
public function isEmpty() {
return empty($this->container);
}
public function getAll($crud="") {
//return new SplFixedArray($this->container);
//$cart = array();
//foreach ($this->container as $entry) {
// if ($entry->GetQuantity() > 0) {
// $cart[] = $entry;
// }
//}
//return $cart;
return $this->container;
}
public function clear() {
$this->container = array();
}
private function getIndexOfEntry($item) {
//var_dump($item); var_dump($this->container);
foreach ($this->container as $key => $entry) {
//echo "key:$key"; print_r($entry);
if ($item[self::ID] == $entry[self::ID]) {
return $key;
}
}
return -1;
}
public function getIterator() {
return new ArrayIterator($this->container);
}
}
function array_push_after($src,$in,$pos){
if(is_int($pos)) $R=array_merge(array_slice($src,0,$pos+1), $in, array_slice($src,$pos+1));
else{
foreach($src as $k=>$v){
$R[$k]=$v;
if($k==$pos)$R=array_merge($R,$in);
}
}return $R;
}
==========
Now need to SubTotol price for item, Totol price all item, some discount rule for price.
Thinking.... No goo way for class~
