问当访问路由Symfony\Component\HttpFoundation\InputBag::get()：参数#1 ($key)时，必须是字符串类型，如果为空，则抛出错误。

EN

Symfony\Component\HttpFoundation\InputBag::get()：参数#1 ($key)必须为字符串类型，空给定，在第160行的D:\xampp\htdocs\laravelprojects\burgerStation\vendor\laravel\framework\src\Illuminate\Session\Middleware\StartSession.php中调用

这是错误帮助所需要的。

Symfony\Component\HttpFoundation\InputBag::get()：参数#1 ($key)必须为字符串类型，空给定，在第160行的http://127.0.0.1:8000/堆栈跟踪请求应用程序用户上下文调试共享中调用

崩溃供应商帧34 D:\xampp\htdocs\laravelprojects\burgerStation\vendor\symfony\http-foundation\InputBag.php Symfony\Component\HttpFoundation\InputBag :3033 D:\xampp\htdocs\laravelprojects\burgerStation\vendor\laravel\framework\src\Illuminate\Session\Middleware\StartSession.php照明\会话\中间件\StartSession:1632 :263 31照明\会话\中间件\StartSession :161 30照明\会话中间件\StartSession :57 29照明\管道\167 28 Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse :37 27照明\管道\管道:167 26照明\Cookie\中间设备\EncryptCookies :67 25照明\管道\管道:167 24照明\管道\管道:103 23照明\路由\路由器:697 22照明\路由\路由器:672 21照明\路由\路由器:636 20照明\路由\路由器:625 19照明\基金会\ Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull \内核:167 18照明\管道\管道:128 17照明\Http\中间管道\Router:3916照明\管道\管道:167 15 Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull :21 14 Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull :3113照明\管道:167 12 Illuminate\Foundation\Http\Middleware\TransformsRequest :21 11 Illuminate\Foundation\Http\Middleware\TrimStrings :40 10照明\管道\管道:167 9 Illuminate\Foundation\Http\Middleware\ValidatePostSize :27 8照明\管道\管道:167 7 Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance :86 6照明\管道\管道:167 5照明\管道\管道:103 4照明\基金会\Http\内核:142 3照明基金会\Http\内核:111 2 :52 1 :21 Symfony\组件\HttpFoundation\InputBag：：获取D:\xampp\htdocs\laravelprojects\burgerStation\vendor\symfony\http-foundation\InputBag.php:30

/**

• InputBag是用户输入值的容器，例如$_GET、$_POST、$_REQUEST和$_COOKIE.

。

• ​
• @author Saif Eddin Gmati azjezz@protonmail.com

*/

最终类InputBag扩展ParameterBag

{

/**

 * Returns a scalar input value by name.

 *

 * @param string|int|float|bool|null $default The default value if the input key does not exist

 *

 * @return string|int|float|bool|null

 */

public function get(string $key, $default = null)

{

    if (null !== $default && !is_scalar($default) && !(\is_object($default) && method_exists($default, '__toString'))) {

        trigger_deprecation('symfony/http-foundation', '5.1', 'Passing a non-scalar value as 2nd argument to "%s()" is deprecated, pass a scalar or null instead.', __METHOD__);

    }