Multiple regex inside controller instead of mutliple routes with single regex

I run Laravel 5.4.

I have those routes :

<?php
    Route::get('/users/{name}', 'UsersController@showByText')->where('name', '[\w]+');
    Route::get('/users/{id}', 'UsersController@showById')->where('id', '[\d]+');
?>

And my controllers :

<?php
    namespace App\Http\Controllers;

    use Illuminate\Http\Request;

    class DashboardController extends Controller
    {

        function showByText($name)
        {
            return DB::table('users')->where('name', 'LIKE', $name)->get();
        }

        function showById($id)
        {
            return DB::table('users')->where('id', $id)->get();
        }
    }
?>

Question :

Could I end up with one single method, to be able to do :

<?php
    Route::get('/users/{mixed}', 'UsersController@show');
?>

And my controller would look like :

<?php
    namespace App\Http\Controllers;

    use Illuminate\Http\Request;

    class DashboardController extends Controller
    {
        function show()
        {
            if( Request::match('mixed', '[\w]+') )
            {
                return DB::table('users')->where('name', 'LIKE', $mixed)->get();
            }
            else if( Request::match('mixed', '[\d]+') )
            {
                return DB::table('users')->where('id', $mixed)->get();
            }
        }
    }
?>

I know Request::match() does not exists, and knowing that Route::pattern('id', '[\d]+'); will force my method show to be compliant only for digits. I would like to know if there is a shorthand for preg_match() with the Request component.

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