网上有很多关于YII2.0微信开发教程，但是太过复杂凌乱，所以今天在这里给大家整理总结利用Yii2微信后台开发的系列了，给需要的小伙伴们参考。

一：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
estUrlRule",
  "controller" => "wechat",
  "extraPatterns" => [
  "GET valid" => "valid",
  ],
 ],
 ],
],

3.在app/controllers中新建WechatController

<?php

namespace apicontrollers;

use Yii;
use yii
estActiveController;

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

二：获取用户信息

用户表设计

复制代码 代码如下:
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

复制代码 代码如下:
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

复制代码 代码如下:
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;
}

三：微信支付

1.微信支付接口：打包支付数据

复制代码 代码如下:
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

复制代码 代码如下:
public function actionNotify(){
    $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
    $postObj = simplexml_load_string($postStr, "SimpleXMLElement", LIBXML_NOCDATA);
    //
    if ($postObj === false) {
        die("parse xml error");
    }
    if ($postObj->return_code != "SUCCESS") {
        die($postObj->return_msg);
    }
    if ($postObj->result_code != "SUCCESS") {
        die($postObj->err_code);
    }
    //微信支付参数
    $appid = Yii::$app->params["wechat"]["appid"];
    $mchid = Yii::$app->params["wechat"]["mchid"];
    $key = Yii::$app->params["wechat"]["key"];
    $wx_pay = new WechatPay($mchid, $appid, $key);
    //验证签名
    $arr = (array)$postObj;
    unset($arr["sign"]);
    if ($wx_pay->getSign($arr, $key) != $postObj->sign) {
        die("签名错误");
    }
    //支付处理正确-判断是否已处理过支付状态
    $orders = Order::find()->where(["uid"=>$postObj->openid, "oid"=>$postObj->out_trade_no, "status" => 0])->all();
    if(count($orders) > 0){
        //更新订单状态
        foreach ($orders as $order) {
            //更新订单
            $order["status"] = 1;
            $order->update();
        }
        return "<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>";
    } else {
        //订单状态已更新，直接返回
        return "<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>";
    }
}

3.微信支付类 WechatPay.php

复制代码 代码如下:
<?php
namespace apisdk;
use Yii;
class WechatPay
{
    protected $mchid;
    protected $appid;
    protected $key;
    public function __construct($mchid, $appid, $key){
        $this->mchid = $mchid;
        $this->appid = $appid;
        $this->key = $key;
    }
    public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp){
        $config = array(
            "mch_id" => $this->mchid,
            "appid" => $this->appid,
            "key" => $this->key,
        );
        $unified = array(
            "appid" => $config["appid"],
            "attach" => "支付",
            "body" => $orderName,
            "mch_id" => $config["mch_id"],
            "nonce_str" => self::createNonceStr(),
            "notify_url" => $notifyUrl,
            "openid" => $openid,
            "out_trade_no" => $outTradeNo,
            "spbill_create_ip" => "127.0.0.1",
            "total_fee" => intval($totalFee * 100),
            "trade_type" => "JSAPI",
        );
        $unified["sign"] = self::getSign($unified, $config["key"]);
        $responseXml = self::curlPost("https://api.mch.weixin.qq.com/pay/unifiedorder", self::arrayToXml($unified));
        $unifiedOrder = simplexml_load_string($responseXml, "SimpleXMLElement", LIBXML_NOCDATA);
        if ($unifiedOrder === false) {
            die("parse xml error");
        }
        if ($unifiedOrder->return_code != "SUCCESS") {
            die($unifiedOrder->return_msg);
        }
        if ($unifiedOrder->result_code != "SUCCESS") {
            die($unifiedOrder->err_code);
        }
        $arr = array(
            "appId" => $config["appid"],
            "timeStamp" => $timestamp,
            "nonceStr" => self::createNonceStr(),
            "package" => "prepay_id=" . $unifiedOrder->prepay_id,
            "signType" => "MD5",
        );
        $arr["paySign"] = self::getSign($arr, $config["key"]);
        return $arr;
    }
    public static function curlGet($url = "", $options = array()){
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        if (!empty($options)) {
            curl_setopt_array($ch, $options);
        }
        //https请求 不验证证书和host
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }
    public static function curlPost($url = "", $postData = "", $options = array()){
        if (is_array($postData)) {
            $postData = http_build_query($postData);
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数
        if (!empty($options)) {
            curl_setopt_array($ch, $options);
        }
        //https请求 不验证证书和host
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }
    public static function createNonceStr($length = 16){
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0; $i<$length; $i++){
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }
    public static function arrayToXml($arr){
        $xml = "<xml>";
        foreach ($arr as $key => $val){
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }
    public static function getSign($params, $key){
        ksort($params, SORT_STRING);
        $unSignParaString = self::formatQueryParaMap($params, false);
        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
        return $signStr;
    }
    protected static function formatQueryParaMap($paraMap, $urlEncode = false){
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v){
            if (null != $v && "null" != $v) {
                if ($urlEncode) {
                    $v = urlencode($v);
                }
                $buff .= $k . "=" . $v . "&";
            }
        }
        $reqPar = "";
        if (strlen($buff)>0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }
}

四：获取JS-SDK的config参数

根据微信公众平台开发者文档：

所有需要使用JS-SDK的页面必须先注入配置信息，否则将无法调用（同一个url仅需调用一次，对于变化url的SPA的web app可在每次url变化时进行调用,目前Android微信客户端不支持pushState的H5新特性，所以使用pushState来实现web app的页面会导致签名失败，此问题会在Android6.2中修复）。

即：

复制代码 代码如下:
wx.config({
    debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
    appId: "", // 必填，公众号的唯一标识
    timestamp: , // 必填，生成签名的时间戳
    nonceStr: "", // 必填，生成签名的随机串
    signature: "",// 必填，签名，见附录1
    jsApiList: [] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
});

1.微信支付类 WechatPay.php

复制代码 代码如下:
<?php
namespace apisdk;
use Yii;
class WechatPay
{
    public function getSignPackage($url) {
        $jsapiTicket = self::getJsApiTicket();
        $timestamp = time();
        $nonceStr = self::createNonceStr();
        // 这里参数的顺序要按照 key 值 ASCII 码升序排序
        $string = "jsapi_ticket=".$jsapiTicket."&noncestr=".$nonceStr."×tamp=".$timestamp."&url=".$url;
        $signature = sha1($string);
        $signPackage = array(
            "appId"     => $this->appid,
            "nonceStr"  => $nonceStr,
            "timestamp" => $timestamp,
            "url"       => $url,
            "signature" => $signature,
            "rawString" => $string
        );
        return $signPackage;
    }
    public static function getJsApiTicket() {
        //使用Redis缓存 jsapi_ticket
        $redis = Yii::$app->redis;
        $redis_ticket = $redis->get("wechat:jsapi_ticket");
        if ($redis_ticket) {
            $ticket = $redis_ticket;
        } else {
            $accessToken = self::getAccessToken();
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=".$accessToken;
            $res = json_decode(self::curlGet($url));
            $ticket = $res->ticket;
            if ($ticket) {
                $redis->set("wechat:jsapi_ticket", $ticket);
                $redis->expire("wechat:jsapi_ticket", 7000);
            }
        }
        return $ticket;
    }
    public static function getAccessToken() {
        //使用Redis缓存 access_token
        $redis = Yii::$app->redis;
        $redis_token = $redis->get("wechat:access_token");
        if ($redis_token) {
            $access_token = $redis_token;
        } else {
            $appid = Yii::$app->params["wechat"]["appid"];
            $appsecret = Yii::$app->params["wechat"]["appsecret"];
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
            $res = json_decode(self::curlGet($url));
            $access_token = $res->access_token;
            if ($access_token) {
                $redis->set("wechat:access_token", $access_token);
                $redis->expire("wechat:access_token", 7000);
            }
        }
        return $access_token;
    }
    public static function curlGet($url = "", $options = array()){
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        if (!empty($options)) {
            curl_setopt_array($ch, $options);
        }
        //https请求 不验证证书和host
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }
    public static function curlPost($url = "", $postData = "", $options = array()){
        if (is_array($postData)) {
            $postData = http_build_query($postData);
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数
        if (!empty($options)) {
            curl_setopt_array($ch, $options);
        }
        //https请求 不验证证书和host
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }
    public static function createNonceStr($length = 16){
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0; $i<$length; $i++){
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }
}

2.获取config参数接口

public function actionConfig(){
 if (isset($_REQUEST["url"])) {
 $url = $_REQUEST["url"];
 //微信支付参数
 $appid = Yii::$app->params["wechat"]["appid"];
 $mchid = Yii::$app->params["wechat"]["mchid"];
 $key = Yii::$app->params["wechat"]["key"];
 $wx_pay = new WechatPay($mchid, $appid, $key);
 $package = $wx_pay->getSignPackage($url);
 $result["error"] = 0;
 $result["msg"] = "获取成功";
 $result["config"] = $package;
 } else {
 $result["error"] = 1;
 $result["msg"] = "参数错误";
 }
 return $result;
}

以上就是利用Yii2微信后台开发全部过程及示例代码，希望本文对大家基于php的微信公众平台开发有所帮助。