微信小程序开发实现刷脸登录

public function login(){     $dir="./***";//自己定义的文件名     if(!file_exists($dir)){       mkdir($dir,0777,true);     }     $upload = new /Think/Upload();// 实例化上传类     $upload->maxSize = 3145728 ;// 设置附件上传大小     $upload->exts = array('jpg', 'gif', 'png', 'jpeg');// 设置附件上传类型     $upload->rootPath = $dir; // 设置附件上传根目录     $upload->savepath='';     // 上传单个文件     $info = $upload->uploadOne($_FILES['file']);     if(!$info) {// 上传错误提示错误信息       return $this->ajaxReturn(array('error'=>true,'msg'=>$upload->getError()));     }else{// 上传成功 获取上传文件信息       $file = $dir . $info['savepath'] . $info['savename'];       $image = base64_encode(file_get_contents($file));       $client = $this->init_face();       $options['liveness_control']='NORMAL';       $options['max_user_num']='1';       $ret = $client->search($image,'BASE64',$this->face_group(),$options);        if($ret['error_code']==0){         $user = $ret['result']['user_list'][0];         $no = $user['user_id'];         $score = $user['score'];          if(!empty($no)){           $data = M('student')->field('no,name,sex')->where("no='{$no}'")->find();            if($data){             //查到此学号             $data['score'] = $score;             echo json_encode($data,JSON_UNESCAPED_UNICODE);           }else{             //本地库不存在此学号             echo "本地数据库没有该学生,百度云库信息:个人信息：{$no},分值：{$score}";           }          }        }else{         echo "活体检测失败，".json_encode($ret,JSON_UNESCAPED_UNICODE);       }     } } 

public function search($image, $imageType, $groupIdList, $options=array()){      $data = array();          $data['image'] = $image;     $data['image_type'] = $imageType;     $data['group_id_list'] = $groupIdList;      $data = array_merge($data, $options);     return $this->request($this->searchUrl, json_encode($data), array(       'Content-Type' => 'application/json',     )); }