how to get only query data from url

i have a url like localhost/posts/id here id is query which is an integer value how can i get this from this url

Level 50

little example

Route::get('/posts/{id}',Controller@method);

public function method($id)
{
$post = Post::find($id);
return view('post.show', compact('post'))
}

{{ $post->title}}

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