基于CI(CodeIgniter)框架实现购物车功能的方法

本文实例讲述了基于CI(CodeIgniter)框架实现购物车功能的方法。分享给大家供大家参考，具体

本文实例讲述了基于CI(CodeIgniter)框架实现购物车功能的方法。分享给大家供大家参考，具体如下：

在商城项目中，购物车是非常重要的一环，此处留下源码，留作笔记！！！

话不多说，往下看:

1. 源代码

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
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('goodsModel','goods');
 $this->load->model('productModel','product');
 $this->load->model('goodsAttrModel','goodsAttr');
 }
 /**
 * [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('cart'),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 = $this->input->cookie('cart');
 //2:判断cookie中数据是否为空
 if(empty($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 = $cartData['goods_id'].'-'.$cartData['product_id'];
 $cookieCart = array($key => $cartData);
 //2-1-2.设置购物车返回值(商品数量、总价)
 $this->setCartReturn(1,$cartData['goods_price']);
 //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($cookieCart, 'goods_price')));
 }
 //3:设置Cookie存储购物车数据
 setCookie('cart',json_encode($cookieCart),LEFT_TIME,'/');
 }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(
 'goods_id' => $this->info['goods_id'],
 'goods_number >=' => $this->info['buy_number'],
 );
 $this->goods = $this->goods->find('goods_id,goods_name,goods_sn,goods_img,shop_price');
 if(!$this->goods){
 $this->msg['msg'] = "商品库存不足";
 $this->ajaxReturn($this->msg);
 }
 #验证货品库存
 $this->product->map = array(
 'goods_id' => $this->info['goods_id'],
 'product_attr' => $this->info['prod_attr'],
 'product_number >=' => $this->info['buy_number'],
 );
 $this->prodData = $this->product->find();
 if(!$this->prodData){
 $this->msg['msg'] = "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['prod_attr']),'goods_attr_id');
 $goodsAttrInfo = $this->goodsAttr->select('goods_attr_value,goods_attr_price');
 $this->specData['product_attr_value'] = implode("|", array_column($goodsAttrInfo, 'goods_attr_value'));
 $this->specData['product_price'] = array_sum(array_column($goodsAttrInfo,'goods_attr_price'));
 # 返回规格信息 $this->specData
 }
 /**
 * 组装购物车添加的数组
 */
 public function setCartData()
 {
 $this->cartData = array(
 'product_id' => $this->prodData['product_id'],
 'product_attr' => $this->prodData['product_attr'],
 'buy_number' => $this->info['buy_number'],
 'goods_price' => $this->info['shop_price'],
 'goods_sum' => $this->info['shop_price'] * $this->info['buy_number'],
 'product_price' => '',
 'product_attr_value' => '',
 'uid' => UID,
 );
 $this->cartData = array_merge($this->cartData,$this->goods);
 #若存在规格【添加规格信息】
 if(!empty($this->info['prod_attr'])){
 $this->cartData['product_price'] = $this->specData['product_price'];
 $this->cartData['product_attr_value'] = $this->specData['product_attr_value'];
 }
 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['code'] = self::STATUS_ON;
 $this->msg['data'] = array(
 'number' => $number,
 'prices' => $prices,
 );
 }
 /**
 * 购物车 新添加数据
 * @param [新数据,原购物车数据]
 */
 public function addCartData($newData,$oldData)
 {
 #组合Key
 $key = $newData['goods_id'].'-'.$newData['product_id'];
 // #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]['buy_number'] = $oldData[$key]['buy_number'] + $newData['buy_number'];
 $oldData[$key]['goods_price'] = $newData['goods_price'];
 $oldData[$key]['goods_sum'] = $oldData[$key]['buy_number'] * $oldData[$key]['goods_price'];
 }else{
 //2.没有 追加新商品
 $oldData[$key] = $newData;
 }
 #返回购物车数据
 return $oldData;
 }
}
?>

2. 数据库

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购物车总结完毕！！！