流明中出现未定义函数 public_path() 错误

Question

我正在尝试以 lumen 格式上传图片。我得到了一些例子，当我试图实现它时，出现了以下错误 

只是想确认这个函数是否已更改或我是否需要包含帮助文件。

谢谢

Answer 1

许多 Laravel 助手在 Lumen 中不存在，包括 public_path() 和 storage_path() 您可以通过在你的 App 目录或你想要的任何地方，然后像这样

自动加载你的 composer.json 文件中的文件

"autoload": {
   "files": [
      "app/helpers.php"
   ],
   ....
  }
},

Answer 2

Laravel helper.php 文件在你的 App 目录或任何你想要的地方，并自动加载该文件到你的 composer.json 文件

composer.json

"autoload": {
   "files": [
      "app/helpers.php"
   ],
   ....
  }
},

helper.php

<?php

if(!function_exists('config_path'))
{
        /**
        * Return the path to config files
        * @param null $path
        * @return string
        */
        function config_path($path=null)
        {
                return app()->getConfigurationPath(rtrim($path, ".php"));
        }
}

if(!function_exists('public_path'))
{

        /**
        * Return the path to public dir
        * @param null $path
        * @return string
        */
        function public_path($path=null)
        {
                return rtrim(app()->basePath('public/'.$path), '/');
        }
}

if(!function_exists('storage_path'))
{

        /**
        * Return the path to storage dir
        * @param null $path
        * @return string
        */
        function storage_path($path=null)
        {
                return app()->storagePath($path);
        }
}

if(!function_exists('database_path'))
{

        /**
        * Return the path to database dir
        * @param null $path
        * @return string
        */
        function database_path($path=null)
        {
                return app()->databasePath($path);
        }
}

if(!function_exists('resource_path'))
{

        /**
        * Return the path to resource dir
        * @param null $path
        * @return string
        */
        function resource_path($path=null)
        {
                return app()->resourcePath($path);
        }
}

if(!function_exists('lang_path'))
{

        /**
        * Return the path to lang dir
        * @param null $str
        * @return string
        */
        function lang_path($path=null)
        {
                return app()->getLanguagePath($path);
        }
}

if ( ! function_exists('asset'))
{
    /**
     * Generate an asset path for the application.
     *
     * @param  string  $path
     * @param  bool    $secure
     * @return string
     */
    function asset($path, $secure = null)
    {
        return app('url')->asset($path, $secure);
    }
}

if ( ! function_exists('elixir'))
{
    /**
     * Get the path to a versioned Elixir file.
     *
     * @param  string  $file
     * @return string
     */
    function elixir($file)
    {
        static $manifest = null;
        if (is_null($manifest))
        {
            $manifest = json_decode(file_get_contents(public_path().'/build/rev-manifest.json'), true);
        }
        if (isset($manifest[$file]))
        {
            return '/build/'.$manifest[$file];
        }
        throw new InvalidArgumentException("File {$file} not defined in asset manifest.");
    }
}

if ( ! function_exists('auth'))
{
    /**
     * Get the available auth instance.
     *
     * @return \Illuminate\Contracts\Auth\Guard
     */
    function auth()
    {
        return app('Illuminate\Contracts\Auth\Guard');
    }
}

if ( ! function_exists('bcrypt'))
{
    /**
     * Hash the given value.
     *
     * @param  string  $value
     * @param  array   $options
     * @return string
     */
    function bcrypt($value, $options = array())
    {
        return app('hash')->make($value, $options);
    }
}

if ( ! function_exists('redirect'))
{
    /**
     * Get an instance of the redirector.
     *
     * @param  string|null  $to
     * @param  int     $status
     * @param  array   $headers
     * @param  bool    $secure
     * @return \Illuminate\Routing\Redirector|\Illuminate\Http\RedirectResponse
     */
    function redirect($to = null, $status = 302, $headers = array(), $secure = null)
    {
        if (is_null($to)) return app('redirect');
        return app('redirect')->to($to, $status, $headers, $secure);
    }
}

if ( ! function_exists('response'))
{
    /**
     * Return a new response from the application.
     *
     * @param  string  $content
     * @param  int     $status
     * @param  array   $headers
     * @return \Symfony\Component\HttpFoundation\Response|\Illuminate\Contracts\Routing\ResponseFactory
     */
    function response($content = '', $status = 200, array $headers = array())
    {
        $factory = app('Illuminate\Contracts\Routing\ResponseFactory');
        if (func_num_args() === 0)
        {
            return $factory;
        }
        return $factory->make($content, $status, $headers);
    }
}

if ( ! function_exists('secure_asset'))
{
    /**
     * Generate an asset path for the application.
     *
     * @param  string  $path
     * @return string
     */
    function secure_asset($path)
    {
        return asset($path, true);
    }
}

if ( ! function_exists('secure_url'))
{
    /**
     * Generate a HTTPS url for the application.
     *
     * @param  string  $path
     * @param  mixed   $parameters
     * @return string
     */
    function secure_url($path, $parameters = array())
    {
        return url($path, $parameters, true);
    }
}


if ( ! function_exists('session'))
{
    /**
     * Get / set the specified session value.
     *
     * If an array is passed as the key, we will assume you want to set an array of values.
     *
     * @param  array|string  $key
     * @param  mixed  $default
     * @return mixed
     */
    function session($key = null, $default = null)
    {
        if (is_null($key)) return app('session');
        if (is_array($key)) return app('session')->put($key);
        return app('session')->get($key, $default);
    }
}


if ( ! function_exists('cookie'))
{
    /**
     * Create a new cookie instance.
     *
     * @param  string  $name
     * @param  string  $value
     * @param  int     $minutes
     * @param  string  $path
     * @param  string  $domain
     * @param  bool    $secure
     * @param  bool    $httpOnly
     * @return \Symfony\Component\HttpFoundation\Cookie
     */
    function cookie($name = null, $value = null, $minutes = 0, $path = null, $domain = null, $secure = false, $httpOnly = true)
    {
        $cookie = app('Illuminate\Contracts\Cookie\Factory');
        if (is_null($name))
        {
            return $cookie;
        }
        return $cookie->make($name, $value, $minutes, $path, $domain, $secure, $httpOnly);
    }
}

最后运行命令：

composer dump-autoload

流明中出现未定义函数 public_path() 错误

Getting undefined function public_path() error in lumen

laravel

lumen