这里不累赘如何安装redis和php redis扩展，主要熟悉调用redis哈希数据类型
简单方法操作如下
1：hSet
2:hGet
4:hDel
5:hGetAll
6:hExists
7:hIncrBy
简单购物车实现
namespace Home\Controller;
use Think\Controller;
use Org\Net\Http;
use Think\Cache\Driver\Redis;
class IndexController extends Controller
{
private $redis_obj=null;
public function __construct()
{
$this->redis_obj=newRedis();
}
/**
*@file:判断购物车是否存在这减商品
*@param$user_id
*@param$goods_id
*/
public function goods_is_exist($user_id,$goods_id)
{
$r1=$this->redis_obj->hExists($user_id,$goods_id);
return$r1;
}
/**
*@file:增加购物车商品
*
*/
public function add_goods()
{
$user_id= intval($_POST['user_id']) ? intval($_POST['user_id']) :0;
$goods_id= intval($_POST['goods_id']) ? intval($_POST['goods_id']) :0;
$exist=$this->goods_is_exist($user_id,$goods_id);
if(!empty($user_id) &&$goods_id) {
//不存在 增加商品
if(!$exist) {
$add_return=$this->redis_obj->hSet($user_id,$goods_id,1);
if($add_return) {
$this->ajaxReturn(array('code'=>0,'msg'=>'success'));
}else{
$this->ajaxReturn(array('code'=>1,'msg'=>'error'));
}
}elseif($exist) {
//存在的商品增加1
$add_exist_result=$this->redis_obj->hIncrBy($user_id,$goods_id,1);
if($add_exist_result) {
$this->ajaxReturn(array('code'=>0,'msg'=>'success','1'=>$add_exist_result));
}else{
$this->ajaxReturn(array('code'=>1,'msg'=>'error'));
}
}
}
}
//减少购物车的商品
public function reduce_goods()
{
$user_id= intval($_POST['user_id']) ? intval($_POST['user_id']) :0;
$goods_id= intval($_POST['goods_id']) ? intval($_POST['goods_id']) :0;
if(!empty($user_id) &&$goods_id) {
$exist=$this->goods_is_exist($user_id,$goods_id);
//不存在
if(!$exist) {
$this->ajaxReturn(array('code'=>1,'msg'=>'goods is not exist '));
}elseif($exist) {
$val=$this->redis_obj->hGet($user_id,$goods_id);
if($val==1) {//购物车商品只有一件的时候 减少到0就是删除
$del_result=$this->redis_obj->hDel($user_id,$goods_id);
if($del_result==1) {
$this->ajaxReturn(array('code'=>0,'msg'=>'success','num'=>0));
}
}elseif($val>1) {
$new_value=$this->redis_obj->hIncrBy($user_id,$goods_id,-1);
if($new_value>0) {
$this->ajaxReturn(array('code'=>0,'msg'=>'success','num'=>$new_value));
}else{
$this->ajaxReturn(array('code'=>1,'msg'=>'error'));
}
}
}
}else{
$this->ajaxReturn(array('code'=>1,'msg'=>'param is empty'));
}
}
//移除商品
public function rm_goods()
{
$user_id= intval($_POST['user_id']) ? intval($_POST['user_id']) :0;
$goods_id= intval($_POST['goods_id']) ? intval($_POST['goods_id']) :0;
if(!empty($user_id) && !empty($goods_id)) {
$arr= explode(',',$goods_id);
array_unshift($arr,$user_id);
$rm_result= call_user_func_array(array($this->redis_obj,"hDel"),$arr);
if($rm_result>=0) {
$this->ajaxReturn(array('code'=>0,'msg'=>'remove success'));
}
}else{
$this->ajaxReturn(array('code'=>1,'msg'=>'param is empty'));
}
}
//购物车列表
public function cart_list()
{
$user_id= intval($_POST['user_id']) ? intval($_POST['user_id']) :0;
if(!empty($user_id)) {
$goods_list=$this->redis_obj->hGetAll($user_id);
$this->ajaxReturn(array('code'=>0,'list'=>$goods_list));
}else{
$this->ajaxReturn(array('code'=>1,'msg'=>'param is empty'));
}
}
//设置一个商品的数量
public function edit_goods_num()
{
}
}
