PHP实战：PHP微信PC二维码登陆的实现思路

PHP实战
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);
    }
  }
}

PHP实战
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']));
    }
  }
}

PHP实战
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');
    }
  }
}

PHP实战
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');
       }

PHP实战
* 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);
      }
  }