I did it myself. None of the methods you mentioned can work. request->all obtains get. Post cannot be obtained by this method. You need to use getcount. I don’t know how you feel about those few points. It doesn’t matter. I took care of it myself.

can be accessed via Request 对象来获取。
如获取表单全部数据, $request->all() 。
获取表单中键名为name的字段，$request->get('name') .
For detailed information, please refer to the official documentation.

I wrote a Demo on GitHub, you can take a look. https://github.com/MhcII/Form...

$request->all() can still be retrieved. I just tested this code and it works.

foreach ($request->all() as $key=>$param) {
    if (is_object($param)) {
        // 这里是 file
    } else {
        // 这里是 text
    }
}

$request->all(); // 获取form表单中的所有字段值
$request->input('name'); // 获取form表单中输入框name='name'的字段值