SQL query $_GET not working, why?

Question

PHP

The situation is this. I'm doing some kind of Blog (according to the Howdy lesson). In the video tutorial, he creates the articles.php page, and on the main page he gives the links the following address href="name/articles.php?id=number", and in the articles.php itself he writes the request

$name = mysqli_query($connect, 'SELECT * FROM `articles` WHERE `id` = ' . (int) $_GET['id']);
// $connect переменная соединения с базой.

After the click, I have a link that looks correct, but the 404 page ...
accordingly, there are some problems, but everything works for him (howdy).

Answer 1

I solved the problem by simply removing the slash before articles from href="/articles.php..."

Answer 2

Watch Howdy, don't read books...

$id = intval($_GET['id']);
var_dump($id);
$name = mysqli_query($connect, "SELECT * FROM `articles` WHERE `id` = '".$id."'");
var_dump($name);