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
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<?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！！！
更多关于codeigniter相关内容感兴趣的读者可查看本站专题：《codeigniter入门教程》、《ci(codeigniter)框架进阶教程》、《php优秀开发框架总结》、《thinkphp入门教程》、《thinkphp常用方法总结》、《zend framework框架入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
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