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PHP后台开发微信公众号实例

Mar 13, 2018 am 09:58 AM
php实例

本文主要和大家分享PHP后台开发微信公众号实例,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!

微信开发的完整例子已经整理在Github,欢迎查看: yii2-wechat-demo。【八宝粥的博客】

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 = &#39;&#39;;
    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[&#39;wechat&#39;][&#39;token&#39;];
        if (!$token) {
            echo &#39;TOKEN is not defined!&#39;;
        } 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 &#39;微信昵称&#39;,
  `sex` tinyint(4) NOT NULL COMMENT &#39;性别&#39;,
  `headimgurl` varchar(255) COLLATE utf8_unicode_ci NOT NULL COMMENT &#39;头像&#39;,
  `country` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT &#39;国家&#39;,
  `province` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT &#39;省份&#39;,
  `city` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT &#39;城市&#39;,
  `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[&#39;wechat&#39;][&#39;appid&#39;];
    $appsecret = Yii::$app->params[&#39;wechat&#39;][&#39;appsecret&#39;];
    $request_url = &#39;https://api.weixin.qq.com/sns/oauth2/access_token?appid=&#39;.$appid.&#39;&secret=&#39;.$appsecret.&#39;&code=&#39;.$code.&#39;&grant_type=authorization_code&#39;;
    //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[&#39;access_token&#39;];
    $refresh_token = $result[&#39;refresh_token&#39;];
    $openid = $result[&#39;openid&#39;];
    //请求微信接口,获取用户信息
    $userInfo = $this->getUserInfo($access_token,$openid);
    $user_check = WechatUser::find()->where([&#39;openid&#39;=>$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)
{
    $request_url = &#39;https://api.weixin.qq.com/sns/userinfo?access_token=&#39;.$access_token.&#39;&openid=&#39;.$openid.&#39;&lang=zh_CN&#39;;
    //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"];
        $user = WechatUser::find()->where([&#39;openid&#39;=>$openid])->one();
        if ($user) {
            $result[&#39;error&#39;] = 0;
            $result[&#39;msg&#39;] = &#39;获取成功&#39;;
            $result[&#39;user&#39;] = $user;
        } else {
            $result[&#39;error&#39;] = 1;
            $result[&#39;msg&#39;] = &#39;没有该用户&#39;;
        }
    } else {
        $result[&#39;error&#39;] = 1;
        $result[&#39;msg&#39;] = &#39;openid为空&#39;;
    }
    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[&#39;wechat&#39;][&#39;appid&#39;];
        $mchid = Yii::$app->params[&#39;wechat&#39;][&#39;mchid&#39;];
        $key = Yii::$app->params[&#39;wechat&#39;][&#39;key&#39;];
        $notifyUrl = Yii::$app->params[&#39;wechat&#39;][&#39;notifyUrl&#39;];
        //支付打包
        $wx_pay = new WechatPay($mchid, $appid, $key);
        $package = $wx_pay->createJsBizPackage($uid, $totalFee, $oid, $notifyUrl, $timestamp);
        $result[&#39;error&#39;] = 0;
        $result[&#39;msg&#39;] = &#39;支付打包成功&#39;;
        $result[&#39;package&#39;] = $package;
        return $result;
    }else{
        $result[&#39;error&#39;] = 1;
        $result[&#39;msg&#39;] = &#39;请求参数错误&#39;;
    }
    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, &#39;SimpleXMLElement&#39;, LIBXML_NOCDATA);
    //
    if ($postObj === false) {
        die(&#39;parse xml error&#39;);
    }
    if ($postObj->return_code != &#39;SUCCESS&#39;) {
        die($postObj->return_msg);
    }
    if ($postObj->result_code != &#39;SUCCESS&#39;) {
        die($postObj->err_code);
    }
    //微信支付参数
    $appid = Yii::$app->params[&#39;wechat&#39;][&#39;appid&#39;];
    $mchid = Yii::$app->params[&#39;wechat&#39;][&#39;mchid&#39;];
    $key = Yii::$app->params[&#39;wechat&#39;][&#39;key&#39;];
    $wx_pay = new WechatPay($mchid, $appid, $key);
    //验证签名
    $arr = (array)$postObj;
    unset($arr[&#39;sign&#39;]);
    if ($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
    $orders = Order::find()->where([&#39;uid&#39;=>$postObj->openid, &#39;oid&#39;=>$postObj->out_trade_no, &#39;status&#39; => 0])->all();
    if(count($orders) > 0){
        //更新订单状态
        foreach ($orders as $order) {
            //更新订单
            $order[&#39;status&#39;] = 1;
            $order->update();
        }
        return &#39;<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>&#39;;
    } else {
        //订单状态已更新,直接返回
        return &#39;<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>&#39;;
    }
}

3.微信支付类 WechatPay.php


<?php
namespace api\sdk;
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(
            &#39;mch_id&#39; => $this->mchid,
            &#39;appid&#39; => $this->appid,
            &#39;key&#39; => $this->key,
        );
        $unified = array(
            &#39;appid&#39; => $config[&#39;appid&#39;],
            &#39;attach&#39; => &#39;支付&#39;,
            &#39;body&#39; => $orderName,
            &#39;mch_id&#39; => $config[&#39;mch_id&#39;],
            &#39;nonce_str&#39; => self::createNonceStr(),
            &#39;notify_url&#39; => $notifyUrl,
            &#39;openid&#39; => $openid,
            &#39;out_trade_no&#39; => $outTradeNo,
            &#39;spbill_create_ip&#39; => &#39;127.0.0.1&#39;,
            &#39;total_fee&#39; => intval($totalFee * 100),
            &#39;trade_type&#39; => &#39;JSAPI&#39;,
        );
        $unified[&#39;sign&#39;] = self::getSign($unified, $config[&#39;key&#39;]);
        $responseXml = self::curlPost(&#39;https://api.mch.weixin.qq.com/pay/unifiedorder&#39;, self::arrayToXml($unified));
        $unifiedOrder = simplexml_load_string($responseXml, &#39;SimpleXMLElement&#39;, LIBXML_NOCDATA);
        if ($unifiedOrder === false) {
            die(&#39;parse xml error&#39;);
        }
        if ($unifiedOrder->return_code != &#39;SUCCESS&#39;) {
            die($unifiedOrder->return_msg);
        }
        if ($unifiedOrder->result_code != &#39;SUCCESS&#39;) {
            die($unifiedOrder->err_code);
        }
        $arr = array(
            "appId" => $config[&#39;appid&#39;],
            "timeStamp" => $timestamp,
            "nonceStr" => self::createNonceStr(),
            "package" => "prepay_id=" . $unifiedOrder->prepay_id,
            "signType" => &#39;MD5&#39;,
        );
        $arr[&#39;paySign&#39;] = self::getSign($arr, $config[&#39;key&#39;]);
        return $arr;
    }
    public static function curlGet($url = &#39;&#39;, $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 = &#39;&#39;, $postData = &#39;&#39;, $options = array()){
        if (is_array($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 = &#39;abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789&#39;;
        $str = &#39;&#39;;
        for ($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 . "&";
            }
        }
        $reqPar = &#39;&#39;;
        if (strlen($buff)>0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }
}

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:


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: &#39;&#39;, // 必填,公众号的唯一标识
    timestamp: , // 必填,生成签名的时间戳
    nonceStr: &#39;&#39;, // 必填,生成签名的随机串
    signature: &#39;&#39;,// 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


<?php
namespace api\sdk;
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=".$nonceStr."&timestamp=".$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 = $redis->get(&#39;wechat:jsapi_ticket&#39;);
        if ($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(&#39;wechat:jsapi_ticket&#39;, $ticket);
                $redis->expire(&#39;wechat:jsapi_ticket&#39;, 7000);
            }
        }
        return $ticket;
    }
    public static function getAccessToken() {
        //使用Redis缓存 access_token
        $redis = Yii::$app->redis;
        $redis_token = $redis->get(&#39;wechat:access_token&#39;);
        if ($redis_token) {
            $access_token = $redis_token;
        } else {
            $appid = Yii::$app->params[&#39;wechat&#39;][&#39;appid&#39;];
            $appsecret = Yii::$app->params[&#39;wechat&#39;][&#39;appsecret&#39;];
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
            $res = json_decode(self::curlGet($url));
            $access_token = $res->access_token;
            if ($access_token) {
                $redis->set(&#39;wechat:access_token&#39;, $access_token);
                $redis->expire(&#39;wechat:access_token&#39;, 7000);
            }
        }
        return $access_token;
    }
    public static function curlGet($url = &#39;&#39;, $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 = &#39;&#39;, $postData = &#39;&#39;, $options = array()){
        if (is_array($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 = &#39;abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789&#39;;
        $str = &#39;&#39;;
        for ($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[&#39;url&#39;])) {
        $url = $_REQUEST[&#39;url&#39;];
        //微信支付参数
        $appid = Yii::$app->params[&#39;wechat&#39;][&#39;appid&#39;];
        $mchid = Yii::$app->params[&#39;wechat&#39;][&#39;mchid&#39;];
        $key = Yii::$app->params[&#39;wechat&#39;][&#39;key&#39;];
        $wx_pay = new WechatPay($mchid, $appid, $key);
        $package = $wx_pay->getSignPackage($url);
        $result[&#39;error&#39;] = 0;
        $result[&#39;msg&#39;] = &#39;获取成功&#39;;
        $result[&#39;config&#39;] = $package;
    } else {
        $result[&#39;error&#39;] = 1;
        $result[&#39;msg&#39;] = &#39;参数错误&#39;;
    }
    return $result;
}

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优化PHP会话性能的方法包括:1.延迟会话启动,2.使用数据库存储会话,3.压缩会话数据,4.管理会话生命周期,5.实现会话共享。这些策略能显着提升应用在高并发环境下的效率。

什么是session.gc_maxlifetime配置设置?什么是session.gc_maxlifetime配置设置?Apr 23, 2025 am 12:10 AM

thesession.gc_maxlifetimesettinginphpdeterminesthelifespanofsessiondata,setInSeconds.1)它'sconfiguredinphp.iniorviaini_set().2)abalanceIsiseededeedeedeedeedeedeedto to to avoidperformance andununununununexpectedLogOgouts.3)

您如何在PHP中配置会话名?您如何在PHP中配置会话名?Apr 23, 2025 am 12:08 AM

在PHP中,可以使用session_name()函数配置会话名称。具体步骤如下:1.使用session_name()函数设置会话名称,例如session_name("my_session")。2.在设置会话名称后,调用session_start()启动会话。配置会话名称可以避免多应用间的会话数据冲突,并增强安全性,但需注意会话名称的唯一性、安全性、长度和设置时机。

您应该多久再生一次会话ID?您应该多久再生一次会话ID?Apr 23, 2025 am 12:03 AM

会话ID应在登录时、敏感操作前和每30分钟定期重新生成。1.登录时重新生成会话ID可防会话固定攻击。2.敏感操作前重新生成提高安全性。3.定期重新生成降低长期利用风险,但需权衡用户体验。

如何在PHP中设置会话cookie参数?如何在PHP中设置会话cookie参数?Apr 22, 2025 pm 05:33 PM

在PHP中设置会话cookie参数可以通过session_set_cookie_params()函数实现。1)使用该函数设置参数,如过期时间、路径、域名、安全标志等;2)调用session_start()使参数生效;3)根据需求动态调整参数,如用户登录状态;4)注意设置secure和httponly标志以提升安全性。

在PHP中使用会议的主要目的是什么?在PHP中使用会议的主要目的是什么?Apr 22, 2025 pm 05:25 PM

在PHP中使用会话的主要目的是维护用户在不同页面之间的状态。1)会话通过session_start()函数启动,创建唯一会话ID并存储在用户cookie中。2)会话数据保存在服务器上,允许在不同请求间传递数据,如登录状态和购物车内容。

您如何在子域中分享会议?您如何在子域中分享会议?Apr 22, 2025 pm 05:21 PM

如何在子域名间共享会话?通过设置通用域名的会话cookie实现。1.在服务器端设置会话cookie的域为.example.com。2.选择合适的会话存储方式,如内存、数据库或分布式缓存。3.通过cookie传递会话ID,服务器根据ID检索和更新会话数据。

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