Yii2.0实现微信公众号后台开发

本文内容较多，包括微信接入、获取微信用户信息、微信支付、JSSDK配置参数获取等部分。如果读者对微信开发没有一个主观上的认识，那么建议读者先研读 微信公众平台开发者文档 ，然后再阅读本文，效果更佳！另外本文的分章节版本可以在 八宝粥的博客 找到。

接入微信

Yii2后台配置

1.在app/config/params.php中配置token参数

return [
    //微信接入
    'wechat' =>[
        'token' => 'your token',
    ],
];

2.在app/config/main.php中配置路由

因为接口模块使用的RESTful API，所以需要定义路由规则。

'urlManager' => [
    'enablePrettyUrl' => true,
    'enableStrictParsing' => true,
    'showScriptName' => false,
    'rules' => [
        [
            'class' => 'yii\rest\UrlRule',
            'controller' => 'wechat',
            'extraPatterns' => [
                'GET valid' => 'valid',
            ],
        ],
    ],
],

3.在app/controllers中新建WechatController

<?php

namespace api\controllers;

use Yii;
use yii\rest\ActiveController;

class WechatController extends ActiveController
{

    public $modelClass = '';

    public function actionValid()
    {
        $echoStr = $_GET["echostr"];
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
        //valid signature , option
        if($this->checkSignature($signature,$timestamp,$nonce)){
            echo $echoStr;
        }
    }

    private function checkSignature($signature,$timestamp,$nonce)
    {
        // you must define TOKEN by yourself
        $token = Yii::$app->params['wechat']['token'];
        if (!$token) {
            echo 'TOKEN is not defined!';
        } else {
            $tmpArr = array($token, $timestamp, $nonce);
            // use SORT_STRING rule
            sort($tmpArr, SORT_STRING);
            $tmpStr = implode( $tmpArr );
            $tmpStr = sha1( $tmpStr );

            if( $tmpStr == $signature ){
                return true;
            }else{
                return false;
            }
        }
    }

}

微信公众号后台配置

在微信公众号后台配置URL和Token，然后提交验证即可。

URL:http://app.demo.com/wechats/valid
Token:your token

获取用户信息

用户表设计

CREATE TABLE `wechat_user` (
  `id` int(11) NOT NULL,
  `openid` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `nickname` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '微信昵称',
  `sex` tinyint(4) NOT NULL COMMENT '性别',
  `headimgurl` varchar(255) COLLATE utf8_unicode_ci NOT NULL COMMENT '头像',
  `country` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '国家',
  `province` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '省份',
  `city` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '城市',
  `access_token` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `refresh_token` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

ALTER TABLE `wechat_user`
  ADD PRIMARY KEY (`id`);

获取用户信息的相关接口

1.用户授权接口：获取access_token、openid等；获取并保存用户资料到数据库

public function actionAccesstoken()
{
    $code = $_GET["code"];
    $state = $_GET["state"];
    $appid = Yii::$app->params['wechat']['appid'];
    $appsecret = Yii::$app->params['wechat']['appsecret'];
    $request_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$appsecret.'&code='.$code.'&grant_type=authorization_code';

    //初始化一个curl会话
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $request_url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = curl_exec($ch);
    curl_close($ch);
    $result = $this->response($result);

    //获取token和openid成功，数据解析
    $access_token = $result['access_token'];
    $refresh_token = $result['refresh_token'];
    $openid = $result['openid'];

    //请求微信接口，获取用户信息
    $userInfo = $this->getUserInfo($access_token,$openid);
    $user_check = WechatUser::find()->where(['openid'=>$openid])->one();
    if ($user_check) {
        //更新用户资料
    } else {
        //保存用户资料
    }

    //前端网页的重定向
    if ($openid) {
        return $this->redirect($state.$openid);
    } else {
        return $this->redirect($state);
    }
}

2.从微信获取用户资料

public function getUserInfo($access_token,$openid)
{
    $request_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';
    //初始化一个curl会话
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $request_url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = curl_exec($ch);
    curl_close($ch);
    $result = $this->response($result);
    return $result;
}

3.获取用户资料接口

public function actionUserinfo()
{
    if(isset($_REQUEST["openid"])){
        $openid = $_REQUEST["openid"];
        $user = WechatUser::find()->where(['openid'=>$openid])->one();
        if ($user) {
            $result['error'] = 0;
            $result['msg'] = '获取成功';
            $result['user'] = $user;
        } else {
            $result['error'] = 1;
            $result['msg'] = '没有该用户';
        }
    } else {
        $result['error'] = 1;
        $result['msg'] = 'openid为空';
    }
    return $result;
}

微信支付

1.微信支付接口：打包支付数据

public function actionPay(){
    if(isset($_REQUEST["uid"])&&isset($_REQUEST["oid"])&&isset($_REQUEST["totalFee"])){
        //uid、oid、totalFee
        $uid = $_REQUEST["uid"];
        $oid = $_REQUEST["oid"];
        $totalFee = $_REQUEST["totalFee"];
        $timestamp = time();

        //微信支付参数
        $appid = Yii::$app->params['wechat']['appid'];
        $mchid = Yii::$app->params['wechat']['mchid'];
        $key = Yii::$app->params['wechat']['key'];
        $notifyUrl = Yii::$app->params['wechat']['notifyUrl'];

        //支付打包
        $wx_pay = new WechatPay($mchid, $appid, $key);
        $package = $wx_pay->createJsBizPackage($uid, $totalFee, $oid, $notifyUrl, $timestamp);
        $result['error'] = 0;
        $result['msg'] = '支付打包成功';
        $result['package'] = $package;
        return $result;
    }else{
        $result['error'] = 1;
        $result['msg'] = '请求参数错误';
    }
    return $result;
}

2.接收微信发送的异步支付结果通知

public function actionNotify(){
    $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
    $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
    //
    if ($