更新代码

vendor/beyondcode/laravel-dump-server/helpers.php

@@ -0,0 +1,16 @@
+<?php
+
+if (! function_exists('config_path')) {
+    /**
+     * Get the configuration path.
+     *
+     * This is a polyfill for the missing shorthand function in lumen.
+     *
+     * @param  string  $path
+     * @return string
+     */
+    function config_path($path = '')
+    {
+        return app()->basePath('config').($path ? DIRECTORY_SEPARATOR.$path : $path);
+    }
+}