How to implement WeChat PC QR code login using PHP

namespace app\home\controller;

class Recognition extends Base{

  public function seeLoginQrcode(){

    $qrcode_return = model('Recognition')->getLoginQrcode();

    if($qrcode_return['error_code']){

      return $this->returnJson("获取失败！",0);

    }else{

      $data=array(

          'url'=>$qrcode_return['ticket'],

          'qrcode_id'=>$qrcode_return['id'],

      );

      return $this->returnJson("获取成功！",1,$data);

    }

  }

}

namespace app\common\model;

use think\Model;

class Recognition extends Model{

  protected $autoWriteTimestamp = false;

  //生成登录用的临时二维码

  public function getLoginQrcode(){

    $appid   = config('THINK_SDK_WEIXIN.APP_KEY');

    $appsecret = config('THINK_SDK_WEIXIN.APP_SECRET');

    if(empty($appid) || empty($appsecret)){

      return(array('error_code'=>true,'msg'=>'请联系管理员配置【AppId】【 AppSecret】'));

    }

    $database_login_qrcode = model('LoginQrcode');

    $database_login_qrcode->where(array('add_time'=>array('lt',($_SERVER['REQUEST_TIME']-604800))))->delete();

    $data_login_qrcode['add_time'] = $_SERVER['REQUEST_TIME'];

    $database_login_qrcode->save($data_login_qrcode);

    $qrcode_id = $database_login_qrcode->getLastInsID();

    if(empty($qrcode_id)){

      return(array('error_code'=>true,'msg'=>'获取二维码错误！无法写入数据到数据库。请重试。'));

    }

    import('Net.Http');

    $http = new \Http();

    //微信授权获得access_token

    $access_token_array = model('AccessTokenExpires')->getAccessToken();

    if ($access_token_array['errcode']) {

      return(array('error_code'=>true,'msg'=>'获取access_token发生错误：错误代码' . $access_token_array['errcode'] .',微信返回错误信息：' . $access_token_array['errmsg']));

    }

    $access_token = $access_token_array['access_token'];

    $qrcode_url='https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token='.$access_token;

    $post_data['expire_seconds'] = 604800;

    $post_data['action_name'] = 'QR_SCENE';

    $post_data['action_info']['scene']['scene_id'] = $qrcode_id;

    $json = $http->curlPost($qrcode_url,json_encode($post_data));

    if (!$json['errcode']){

      $condition_login_qrcode['id']=$qrcode_id;

      $data_login_qrcode['id'] = $qrcode_id;

      $data_login_qrcode['ticket'] = $json['ticket'];

      if($database_login_qrcode->isUpdate(true)->save($data_login_qrcode)){

        return(array('error_code'=>false,'id'=>$qrcode_id,'ticket'=>'https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket='.urlencode($json['ticket'])));

      }else{

        $database_login_qrcode->where($condition_login_qrcode)->delete();

        return(array('error_code'=>true,'msg'=>'获取二维码错误！保存二维码失败。请重试。'));

      }

    }else{

      $condition_login_qrcode['id'] = $qrcode_id;

      $database_login_qrcode->where($condition_login_qrcode)->delete();

      return(array('error_code'=>true,'msg'=>'发生错误：错误代码 '.$json['errcode'].'，微信返回错误信息：'.$json['errmsg']));

    }

  }

}

namespace app\mobile\controller;

class Wechat extends Base{

  public function index()

  {

    import('Wechat.Wechat');

    $wechat = new \Wechat();

    $data = $wechat->request();

    list($content, $type) = $this->reply($data);

    if ($content) {

      $wechat->response($content, $type);

    }

    else {

      exit();

    }

  }

  public function reply($data)

  {

    if ($data['MsgType'] == 'event') {

      $id = $data['EventKey'];

      switch (strtoupper($data['Event'])) {

        case 'SCAN':

          return $this->scan($id, $data['FromUserName']);

        case 'CLICK':

          //回复？

          return array('click', 'text');

          break;

        case 'SUBSCRIBE':

          //关注

          return array('Welcome', 'text');

          break;

        case 'UNSUBSCRIBE':

          //取关

          return array('BYE-BYE', 'text');

        case 'LOCATION':

          //定位

          break;

      }

    }

    else {

      if ($data['MsgType'] == 'text') {

        return array("测试成功！",'text');

      }

      if ($data['MsgType'] == 'location') {

      }

      if (import('@.ORG.' . $data['MsgType'] . 'MessageReply')) {

      }

    }

    return false;

  }

  private function scan($id, $openid = '', $issubscribe = 0)

  {

    if ((1000000000 < $id) && $openid) {

       if ($user = model('Member')->field('id')->where(array('third_id' => $openid))->find()) {

         $data=array(

           'id'=>$id,

           'uid'=> $user['id']

         );

         model('LoginQrcode')->isUpdate()->save($data);

         return array('登陆成功', 'text');

       }

       $data=array(

         'id'=>$id,

         'uid'=>-1

       );

       model('LoginQrcode')->isUpdate(true)->save($data);

      $return[] = array('点击授权登录', '',config('SITE_LOGO'), config('SITE_URL') . '/mobile/WechatBind/ajaxWebLogin?qrcode_id=' . $id);

      return array($return, 'news');

    }

  }

}

if ($user = model('Member')->field('id')->where(array('third_id' => $openid))->find()) {

         $data=array(

           'id'=>$id,

           'uid'=> $user['id']

         );

         model('LoginQrcode')->isUpdate()->save($data);

         return array('登陆成功', 'text');

       }

* 微信登录异步请求

   * @return \think\response\Json

   * created by sunnier<xiaoyao_xiao@126.com>

   */

  public function ajaxWechatLogin(){

      for ($i = 0; $i < 6; $i++) {

        $database_login_qrcode = model('LoginQrcode');

        $condition_login_qrcode['id'] = input('get.qrcode_id');

        if(empty($condition_login_qrcode['id'])){

          return $this->returnJson('未获取到qrcode_id！',0);

        }

        $now_qrcode = $database_login_qrcode->field('`uid`')->where($condition_login_qrcode)->find();

        if (!empty($now_qrcode['uid'])) {

          if ($now_qrcode['uid'] == -1) {

            $data_login_qrcode['uid'] = 0;

            $database_login_qrcode->where($condition_login_qrcode)->isUpdate(true)->save($data_login_qrcode);

            return $this->returnJson('请在微信公众号点击授权登录！',0);

          }

          $database_login_qrcode->where($condition_login_qrcode)->delete();

          $result = model('Member')->autologin('id', $now_qrcode['uid']);

          if (empty($result['error_code'])) {

            return $this->returnJson('登录成功！',1,$result['user']);

          } else if ($result['error_code'] == 1001) {

            return $this->returnJson('没有查找到用户，请重新扫描二维码！',0);

          } else if ($result['error_code']) {

            return $this->returnJson('登陆失败！',0);

          }

        }

        if ($i == 5) {

          return $this->returnJson('登陆失败',0);

        }

        sleep(3);

      }

  }