Laravel Route Parameters Not Trimmed (it normally works with when whitespace is added)

I have the following route in web.php:

Route::get('posts/{encoded_id}/{slug}', 'PostController@show')

... and it works fine:

http://example.test/posts/1Dl89aRjpk/this-is-some-title

But the "problem" is that it will also work when I add a white space at the end of route parameter {encoded_id}:

http://example.test/posts/1Dl89aRjpk /this-is-some-title

// or

http://example.test/posts/1Dl89aRjpk%20 /this-is-some-title

// or

http://example.test/posts/1Dl89aRjpk%20%20 /this-is-some-title

With whitespace added at the end - this will work normally and there is no 404:

Post::where('encoded_id', $encoded_id)->firstOrFail();

... but why?

Maybe because of the type of field in the DB (CHAR)?

$table->char('encoded_id', 10)

Or maybe it has something to to with .htaccess (I'm using XAMPP / Windows)?

I'm using Laravel 5.6.

via Chebli Mohamed