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微信扫码登陆的总体步骤--详细

2023-09-14 14:27

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前言

记录一下自己实现微信登陆的艰难历程，希望能对大家有所帮助。

一、微信公众号申请

1.点击下方地址进入

https://mp.weixin.qq.com/debug/cgi-bin/sandboxinfo?action=showinfo&t=sandbox/index

2.接口配置信息的修改

eg：之前在这里卡了很久一直不知道怎么弄，最后经过不断的尝试发现想要修改成功首先你得有一个域名和服务器，它的大概实现图如下
在这里插入图片描述
具体实现

（1）申请域名并成功部署服务器（此处不懂，点击此处）
注：因为本人使用的宝塔面板，此处就以宝塔面板为例
（2）在宝塔面板的软件管理下载php环境，并在部署域名的时候选择php环境
（3）在域名的根目录下新建一个php文件，并在该文件下输入以下代码

  if ('notify' == $type) {    echo $_GET['echostr'];}

注：若此处申请失败可以使用官网的代码

（4）接口URL填写格式详述
（5）成功后系统反馈回修改成功，此时就大功告成了，接下来就是二维码得提取了和回调了

二、利用php代码实现二维码的获取

eg：这里就直接给源码了（内涵具体注释），源码所放位置为刚刚在域名根目录下所建立的php文件内

1.引入库

代码如下（示例）：

<?phpheader('Content-Type: text/html;charset=utf-8');header('Access-Control-Allow-Origin:http://localhost:8080'); // *代表允许任何网址请求header('Access-Control-Allow-Methods:POST,GET,OPTIONS,DELETE'); // 允许请求的类型header('Access-Control-Allow-Credentials: true'); // 设置是否允许发送 cookiesheader('Access-Control-Allow-Headers: Content-Type,Content-Length,Accept-Encoding,X-Requested-with, Origin'); // 设置允许自定义请求头的字段require './vendor/autoload.php';$type = $_GET['type'];$config['app_id'] = 'xxx';//你的微信公众平台的app_id$config['secret'] = 'xxx';//你的微信公众平台的secret$config['expire'] = 60;function getKey(){    return time() . rand(0, 10000);//获取key值防止用户重复登陆}//存取key到缓存，并设置key的有效时间，判断key值是否变化function cacheKey(){    global $config;    $cache = getCache();    $key = getKey();    return $cache->set($key, -1, ['nx', 'ex' => $config['expire']]) ? $key : cacheKey();}function response($code, $msg, $data = []){    exit(json_encode(compact('code', 'msg', 'data')));}//获取缓存，用来存储key值function getCache(){    static $cache;    return $cache ?? $cache = \Symfony\Component\Cache\Adapter\RedisAdapter::createConnection('redis://localhost');}//根据微信的app_id,secret获取app值function getWechatApp(){    global $config;    static $app;    return $app ?? $app = \EasyWeChat\Factory::officialAccount([        'app_id' => $config['app_id'],        'secret' => $config['secret'],    ]);}if ('getQrcode' == $type) {    try {        $key = cacheKey();        $app = getWechatApp();        $result = $app->qrcode->temporary($key, $config['expire']);//根据key值和二维码有效时间生成临时二维码        $url = $app->qrcode->url($result['ticket']);//将临时二维码是指为地址        $data = ['key' => $key, 'url' => $url];//输出key值和二维码地址        response(0, 'success', $data);    } catch (Exception $e) {        response(500, '系统繁忙，请稍后再试');    }}if ('login' == $type) {    $con = getCon();    $result = mysqli_query($con, "select openid from users where id=1");    $user = mysqli_fetch_assoc($result);//    response(0, '已登陆',$user);    if($user){        $result = mysqli_query($con, "delete from users where id=1");        response(0, '已登陆',$user);    }else{        $result = mysqli_query($con, "delete from users where id=1");        response(-1, '未登陆',$user);    }//    $key = $_GET['key'];//获取当前的key值//    $cache = getCache();//获取缓存//    $userId = $cache->get($key);//判断缓存中的key值是否与当前key值相等//    if (-1 == $userId) {//不相等显示未登录//        response(-1, 'not login',$userId);//    } elseif (!$userId) {//没有值显示过期//        $con = getCon();//        $result = mysqli_query($con, "select openid from users where id=1");//        $user = mysqli_fetch_assoc($result);    response(0, '已登陆',$user);//        if($user){//            $result = mysqli_query($con, "delete from users where id=1");//            response(0, '已登陆',$user);//        }else{//            response(1, '二维码已经过期',$userId);//        }////    } else {//存在即此时的id值为数据库查询到的id值//        session_start();//        $_SESSION['userId'] = $userId;//        response(0, '已登陆',$userId);//    }}if ('autoLogin' == $type) {    $con = getCon();    $result = mysqli_query($con, "select openid from users where id=1");    $user = mysqli_fetch_assoc($result);//    response(0, '已登陆',$user);    if($user){        $result = mysqli_query($con, "delete from users where id=1");        response(0, '已登陆',$user);    }//    response(-1, 'no login',$openId);//    $con = getCon();//    if (!$userId || !$result = mysqli_query($con, "select id,nick_name,avatar_url from users where id=$userId")) {//        response(-1, 'no login');//    }//    $user = mysqli_fetch_assoc($result);//    response(0, 'success', [//        'userInfo' => [//            'nickName' =>  $openId,//        ]//    ]);}function responseMsg(){    $postStr = file_get_contents("php://input");//获取数据流    if (!$postStr) {        exit();    }    $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);//将数据流转化成字符串类型    $msgType = trim($postObj->MsgType);//判断事件类型    if ('event' == $msgType) {//判断是关注和扫码事件        echo receiveEvent($postObj);    }}function getCon(){    static $con;    return $con ?? $con = mysqli_connect('localhost', '数据库账号', '数据库密码', '数据库名称');}function loginInit($key, $openId){    $cache = getCache();//    if (!$cache->exists($key)) {//        return false;//    }    $con = getCon();    $result = mysqli_query($con, "insert into users(openid,id)values ('$openId',1)");//    if (!$result) {//        try {//            $app = getWechatApp();//            $user = $app->user->get($openId);//        } catch (Exception $e) {//            return false;//        }//        $nickname = $user['nickname'];//        $avatarUrl = $user['headimgurl'];//        $result = mysqli_query($con, "insert into users(nick_name,avatar_url,openid)values ('$nickname','$avatarUrl','$openId')");//        if (!$result) {//            return false;//        }//        $uid = mysqli_insert_id();//    }    $user = mysqli_fetch_assoc($result);    $uid = $user['openid'];    return true;}function transmitText($postObj, $content){    $xmlTpl = "<xml>  <ToUserName><![CDATA[%s]]></ToUserName>  <FromUserName><![CDATA[%s]]></FromUserName>  <CreateTime>%s</CreateTime>  <MsgType><![CDATA[text]]></MsgType>  <Content><![CDATA[%s]]></Content></xml>";    return sprintf($xmlTpl, $postObj->FromUserName, $postObj->ToUserName, time(), $content);}function receiveEvent($postObj){    if (in_array($postObj->Event, ['subscribe', 'SCAN'])) {        $key = str_replace('qrscene_', '', $postObj->EventKey);//获取数据流传输过来的事件类型        if (empty($key)) {//若没有返回空值            return '';        }        //若接收到则调用登陆判断        $responseText = loginInit($key, trim($postObj->FromUserName)) ? '登陆成功' : '系统繁忙，请稍后再试';        return transmitText($postObj, $responseText);    }    return '';}if ('notify' == $type) {//    loginInit(123, osUsv5gncfksgUo1Nn8AnO9mJa88);    responseMsg();//    response(1, '二维码已经过期');    //echo $_GET['echostr'];}