App\Http\Controllers\CommentsController::update PHP Method

    public function update(Request $request, $id)
    {
        $this->validate($request, ['content' => 'required']);
        $comment = Comment::findOrFail($id);
        $comment->update($request->only('content'));
        event('comments.updated', [$comment]);
        event(new ModelChanged('articles', 'comments'));
        flash()->success(trans('forum.comment_edit'));
        return back();
    }