这篇文章主要介绍了基于CI(CodeIgniter)框架实现购物车功能的方法,结合实例形式分析了CodeIgniter框架购物车功能类的定义及数据库建立相关sql命令,需要的朋友可以参考下

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

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！！！

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