php利用COOKIE制作网站购物车

superadmin

function addcart($goods_id,$goods_num){
　
$cur_cart_array = unserialize(stripslashes($_COOKIE['shop_cart_info']));
　if($cur_cart_array==""){
　
　 $cart_info[0][] = $goods_id;
　 $cart_info[0][] = $goods_num;
　
　 setcookie("shop_cart_info",serialize($cart_info));
　
　}elseif($cur_cart_array<>""){
　
　 //返回数组键名倒序取最大
　 $ar_keys = array_keys($cur_cart_array);
　 rsort($ar_keys);
　 $max_array_keyid = $ar_keys[0]+1;
　
　 //遍历当前的购物车数组
　 //遍历每个商品信息数组的0值，如果键值为0且货号相同则购物车存在相同货品
　 foreach($cur_cart_array as $goods_current_cart){
　　foreach($goods_current_cart as $key=>$goods_current_id){
　　 if($key == 0 and $goods_current_id == $goods_id){
　 echo "<script language=JavaScript>";
　 echo "if(confirm('购物车已经有该商品，继续购物按----确定!查看购物车按----取消!'))";
　 echo "{history.go(-1)}";
　 echo "else{window.location.href='xqs_cart.php'}";
　 echo "</script>";
　　　exit();
　　 }
　　}
　 }
　
　 $cur_cart_array[$max_array_keyid][] = $goods_id;
　 $cur_cart_array[$max_array_keyid][] = $goods_num;
　
　 setcookie("shop_cart_info",serialize($cur_cart_array));
　　
　}
　
　}
　
//从购物车删除
function delcart($goods_array_id){
　
$cur_goods_array = unserialize(stripslashes($_COOKIE['shop_cart_info']));
　
//删除该商品在数组中的位置
　unset($cur_goods_array[$goods_array_id]);
　setcookie("shop_cart_info",serialize($cur_goods_array));
　
}
　
//修改购物车货品数量
function update_cart($up_id,$up_num,$goods_ids){
　
　//先清空cookie,以便重新设置，传递过来三个数组参数 1数组的标识 2商品数量数组 3商品编号数组
　//如果不清空cookie则无法处理数量为零的商品
　setcookie("shop_cart_info","");
　foreach($up_id as $song){
　
　 //先返回数组当前单元；再把指针向下移动一个位置
　 $goods_nums = current($up_num);
　 $goods_id = current($goods_ids);
　 next($up_num);
　 next($goods_ids);
　
　 //当商品数量为空的时候，注销此处的数组值并用continue 2 语句避开下面的操作，继续做foreach循环
　 while($goods_nums == 0){
　　unset($song);
　　continue 2;
　 }
　
　 $cur_goods_array[$song][0] = $goods_id;
　 $cur_goods_array[$song][1] = $goods_nums;
　
　}
　
　setcookie("shop_cart_info",serialize($cur_goods_array));
　
}