Home  >  Article  >  Backend Development  >  Principle of novice shopping cart implementation in php

Principle of novice shopping cart implementation in php

伊谢尔伦
伊谢尔伦Original
2017-03-15 16:37:178403browse

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));

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!

相关文章:

jQuery基于json与cookie实现购物车的方法

原生js模拟淘宝购物车项目实战

js实现简单的购物车有图有代码

php 实现简单加入购物车的图文代码详细介绍

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn