opcache: fix opcache issue

app/Http/Controllers/Admin/ConfigController.php

@@ -138,10 +138,10 @@ class ConfigController extends Controller
         if (!\File::put(base_path() . '/config/v2board.php', "<?php\n return $data ;")) {
             abort(500, '修改失败');
         }
-        \Artisan::call('config:cache');
         if (function_exists('opcache')) {
             opcache_reset();
         }
+        \Artisan::call('config:cache');
         return response([
             'data' => true
         ]);