文档修改

@@ -892,7 +892,11 @@ class Update extends Api
             }
             $UserArray = Db::name('user')->field('nickname')->order('id desc')->page(1, 50)->select();
             $NickNameArray = array_column($UserArray, 'nickname');
-            $rand_list = array_rand(array_count_values($NickNameArray), 30);
+            if(count($NickNameArray)<30){
+                $rand_list = array_rand(array_count_values($NickNameArray), count($NickNameArray));
+            }else{
+                $rand_list = array_rand(array_count_values($NickNameArray), 30);
+            }
             foreach ($rand_list as $key) {
                 $RankArray[] = $NickNameArray[$key];
             }