How to implement shopping cart function based on CodeIgniter framework

This article mainly introduces the method of implementing the shopping cart function based on the CI (CodeIgniter) framework. It analyzes the definition of the shopping cart function class of the CodeIgniter framework and the relevant sql commands for database establishment in the form of examples. Friends who need it can refer to it

The example in this article describes the method of implementing the shopping cart function based on the CI (CodeIgniter) framework. Share it with everyone for your reference, the details are as follows:

In the mall project, the shopping cart is a very important part, leave the source code here for notes! ! !

Without further ado, let’s read on:

1. Source code

<?php
defined(&#39;BASEPATH&#39;) OR exit(&#39;No direct script access allowed&#39;);
class cart extends Home_Controller {
  private $info = array();    #前台提交数据
  private $specData = array();  #规格信息
  private $prodData = array();  #货品组合信息
  private $cartData = array();  #购物车入库数据
  /**
   * 构造函数
   */
  public function __construct()
  {
    parent::__construct();
    $this->load->model(&#39;goodsModel&#39;,&#39;goods&#39;);
    $this->load->model(&#39;productModel&#39;,&#39;product&#39;);
    $this->load->model(&#39;goodsAttrModel&#39;,&#39;goodsAttr&#39;);
  }
  /**
   * [购物车]数据添加
   */
  public function cartAdd()
  {
    #接收购物车提交数据
    $this->info = $this->input->post();
  // $this->ajaxReturn($this->info);
    #1.验证商品库存、货品库存
    $this->checkGoodsNumber();
    #2.查询规格名称、价格
    $this->getSpecData();
    #3.组装购物车添加de数据
    $cartData = $this->setCartData();
  p(json_decode($this->input->cookie(&#39;cart&#39;),true));
    # 一、判断是否登录
    if(!UID){
      //未登录 数据存入Cookie中
      //1:获取cookie中的购物车数据
      $cookieCartData = $this->input->cookie(&#39;cart&#39;);
      //2:判断cookie中数据是否为空
      if(empty($cookieCartData)){
        //2-1:为空则表示用户没有添加过购物车
        //2-1-1.设置Key-->生成购物车数据
        $key = $cartData[&#39;goods_id&#39;].&#39;-&#39;.$cartData[&#39;product_id&#39;];
        $cookieCart = array($key => $cartData);
        //2-1-2.设置购物车返回值(商品数量、总价)
        $this->setCartReturn(1,$cartData[&#39;goods_price&#39;]);
        //2-1-3.设置Cookie存储购物车数据
      }else{
        //2-2:不为空 表示用户添加过购物车
        //2-2-1.追加购物数据
        $cookieCart = $this->addCartData($cartData,json_decode($cookieCartData,true));
        //2-2-2.设置购物车返回值(商品数量、总价)
        $this->setCartReturn(count($cookieCart),array_sum(array_column($cookieCart, &#39;goods_price&#39;)));
      }
      //3:设置Cookie存储购物车数据
      setCookie(&#39;cart&#39;,json_encode($cookieCart),LEFT_TIME,&#39;/&#39;);
    }else{
      //已登录 数据存入数据库
    }
    //返回购物车提示数据
    $this->ajaxReturn($this->msg);
  }
  /**
   * 验证商品库存
   */
  public function checkGoodsNumber()
  {
    $this->goods->map = array(
      &#39;goods_id&#39;     =>  $this->info[&#39;goods_id&#39;],
      &#39;goods_number >=&#39;  => $this->info[&#39;buy_number&#39;],
    );
    $this->goods = $this->goods->find(&#39;goods_id,goods_name,goods_sn,goods_img,shop_price&#39;);
    if(!$this->goods){
      $this->msg[&#39;msg&#39;] = "商品库存不足";
      $this->ajaxReturn($this->msg);
    }
    #验证货品库存
    $this->product->map = array(
      &#39;goods_id&#39;     =>  $this->info[&#39;goods_id&#39;],
      &#39;product_attr&#39;   =>  $this->info[&#39;prod_attr&#39;],
      &#39;product_number >=&#39; => $this->info[&#39;buy_number&#39;],
    );
    $this->prodData = $this->product->find();
    if(!$this->prodData){
      $this->msg[&#39;msg&#39;] = "货品库存不足";
      $this->ajaxReturn($this->msg);
    }
    return true;
  }
  /**
   * 组合规格名称、价格
   */
  public function getSpecData()
  {
    $this->goodsAttr->map = inToType(explode("|", $this->info[&#39;prod_attr&#39;]),&#39;goods_attr_id&#39;);
    $goodsAttrInfo = $this->goodsAttr->select(&#39;goods_attr_value,goods_attr_price&#39;);
    $this->specData[&#39;product_attr_value&#39;] = implode("|", array_column($goodsAttrInfo, &#39;goods_attr_value&#39;));
    $this->specData[&#39;product_price&#39;] = array_sum(array_column($goodsAttrInfo,&#39;goods_attr_price&#39;));
    # 返回规格信息 $this->specData
  }
  /**
   * 组装购物车添加的数组
   */
  public function setCartData()
  {
    $this->cartData = array(
      &#39;product_id&#39;  =>  $this->prodData[&#39;product_id&#39;],
      &#39;product_attr&#39; =>  $this->prodData[&#39;product_attr&#39;],
      &#39;buy_number&#39;  =>  $this->info[&#39;buy_number&#39;],
      &#39;goods_price&#39;  =>  $this->info[&#39;shop_price&#39;],
      &#39;goods_sum&#39;   =>  $this->info[&#39;shop_price&#39;] * $this->info[&#39;buy_number&#39;],
      &#39;product_price&#39; =>  &#39;&#39;,
      &#39;product_attr_value&#39;  =>  &#39;&#39;,
      &#39;uid&#39;      =>  UID,
    );
    $this->cartData = array_merge($this->cartData,$this->goods);
    #若存在规格【添加规格信息】
    if(!empty($this->info[&#39;prod_attr&#39;])){
      $this->cartData[&#39;product_price&#39;] = $this->specData[&#39;product_price&#39;];
      $this->cartData[&#39;product_attr_value&#39;] = $this->specData[&#39;product_attr_value&#39;];
    }
    return $this->cartData;
    # 购物车 添加的总数据 $this->cartData;
  }
  /**
   * 设置购物车返回提示数据
   * @param [商品数量,总价]
   */
  public function setCartReturn($number,$prices)
  {
    $this->msg[&#39;code&#39;] = self::STATUS_ON;
    $this->msg[&#39;data&#39;] = array(
        &#39;number&#39;  =>  $number,
        &#39;prices&#39;  =>  $prices,
    );
  }
  /**
   * 购物车 新添加数据
   * @param [新数据,原购物车数据]
   */
  public function addCartData($newData,$oldData)
  {
    #组合Key
    $key = $newData[&#39;goods_id&#39;].&#39;-&#39;.$newData[&#39;product_id&#39;];
    // #判断购物车中是否有该商品
    if(isset($oldData[$key])){
      //1.有 合并商品数量、价格
      $oldData[$key][&#39;buy_number&#39;] = $oldData[$key][&#39;buy_number&#39;] + $newData[&#39;buy_number&#39;];
      $oldData[$key][&#39;goods_price&#39;] = $newData[&#39;goods_price&#39;];
      $oldData[$key][&#39;goods_sum&#39;] = $oldData[$key][&#39;buy_number&#39;] * $oldData[$key][&#39;goods_price&#39;];
    }else{
      //2.没有 追加新商品
      $oldData[$key] = $newData;
    }
    #返回购物车数据
    return $oldData;
  }
}
?>

2. Database

CREATE TABLE `shop_goods` (
 `goods_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
 `goods_name` varchar(255) NOT NULL,
 `type_id` int(11) DEFAULT NULL,
 PRIMARY KEY (`goods_id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
CREATE TABLE `shop_product` (
 `product_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
 `goods_id` int(11) NOT NULL,
 `goods_price` decimal(10,2) NOT NULL,
 `goods_num` int(11) NOT NULL,
 `goods_sn` varchar(50) NOT NULL,
 `goods_attr_id` varchar(100) NOT NULL,
 PRIMARY KEY (`product_id`)
) ENGINE=InnoDB AUTO_INCREMENT=18 DEFAULT CHARSET=utf8;
CREATE TABLE `shop_goods_attr` (
 `goods_attr_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
 `goods_id` int(11) NOT NULL,
 `attr_id` int(11) NOT NULL,
 `attr_value` varchar(255) NOT NULL,
 PRIMARY KEY (`goods_attr_id`)
) ENGINE=InnoDB AUTO_INCREMENT=126 DEFAULT CHARSET=utf8;

CI shopping cart summary completed! ! !

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