Principle of novice shopping cart implementation in php

伊谢尔伦
Release: 2023-03-01 09:26:01
Original
8429 people have browsed it

Principle of novice shopping cart implementation in php实现的方法本质是:把cookie存入array,对array进行增加、删除、修改操作,array中的每一组记录都是一个商品的信息(个数,价格等)

解决购物车的思路是用cookie记录一个二维数组。一维代表每一个商品,二维包含了商品的id,商品的数量...等可以自行增加,反正都是二维了,自己愿意带多少个商品属性就加上去。

Principle of novice shopping cart implementation in php
对购物车里商品的操作一般有以下几个:添加商品,修改商品数量,删除商品,清空购物车。

这几个操作都是针对cookie的。每次把cookie中的数组取出来,增加、修改、删除一番,再记录到cookie中。至于清空购物车,那就更简单了,直接设置同名的cookie为空就可以了。

下面是我写的实现购物车功能具体操作函数

//加入购物车
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(&#39;购物车已经有该商品,继续购物按----确定!查看购物车按----取消!&#39;))";
   echo "{history.go(-1)}";
   echo "else{window.location.href=&#39;http://blog.163.com/wz_pk007/blog/xqs_cart.php&#39;}";
   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[&#39;shop_cart_info&#39;]));
  
//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));
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以上就是简单Principle of novice shopping cart implementation in php实现的方法,更多相关内容请关注php中文网!

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