no message

+<?php
+namespace app\admin\controller;
+use think\Db;
+use think\facade\Env;
+use think\facade\Request;
+class Api{
+    protected $filepath,$publicpath,$viewSuffix;
+    function initialize()
+    {
+        parent::initialize();
+        $viewPath = config('template.view_path');
+        $this->viewSuffix = config('template.view_suffix');
+		$viewPath = $viewPath ? $viewPath : 'view';
+        $this->filepath = Env::get('app_path').strtolower(config('default_module')).'/'.$viewPath.'/';
+        $this->publicpath =  'static/android/';
+		$this->assign ( 'viewSuffix',$this->viewSuffix );
+    }
+    //获取最新版本
+    public function compareVersion() {
+        $list = db('android')->select();
+        if(isset($list)){
+            foreach ($list as $key => $value) {
+                $array[] = $value['version'];
+            }
+        }
+        if(isset($array)){
+            $newarray = array();
+            foreach ($array as  $value) {
+                $newarray[] = explode('.',$value);
+            }
+            $max = $newarray[0][0];
+            foreach ($newarray as  $v){
+                    if($v[0]>$max){
+                        $max = $v[0];
+                    }
+            }
+            foreach ($newarray as $k=> $vl){
+                if($vl[0] != $max){
+                    unset($newarray[$k]);
+                }
+            }
+            $max = $newarray[0][1];
+            foreach ($newarray as  $v){
+                    if($v[1]>$max){
+                        $max = $v[1];
+                    }
+            }
+            foreach ($newarray as $k=> $vl){
+                if($vl[1] != $max){
+                    unset($newarray[$k]);
+                }
+            }
+            $max = $newarray[0][2];
+            foreach ($newarray as $k=> $v){
+                    if($v[2]>$max){
+                        $max = $v[2];
+                    }
+            }
+            foreach ($newarray as $k=> $vl){
+                if($vl[2] != $max){
+                    unset($newarray[$k]);
+                }
+            }
+
+            foreach ($newarray as  $ve) {
+                $ay = implode('.',$ve);
+            }
+        }
+        $version = db('android')->where(array('version'=>$ay))->select();
+        if($version){
+            $str = "http://xt03.colorcun.com".$version['0']['file_url'];
+            $version[0]['file_url'] = $str;
+            $result['code'] = 1;
+            $result['data'] = $version;
+            $result['msg'] = 'success';
+            return json_encode($result);
+        }else{
+            $result['code'] = 0;
+            $result['data'] = '';
+            $result['msg'] = 'fail';
+            return json_encode($result);
+        }
+    }
+}