文档修改

@@ -893,7 +893,7 @@ class Update extends Api
             $UserArray = Db::name('user')->field('nickname')->order('id desc')->page(1, 50)->select();
             $NickNameArray = array_column($UserArray, 'nickname');
             if(count($NickNameArray)<30){
-                $rand_list = array_rand($NickNameArray), count($NickNameArray));
+                $rand_list = array_rand($NickNameArray, count($NickNameArray));
             }else{
                 $rand_list = array_rand($NickNameArray, 30);
             }