I have the following PHP code with the query to retrieve the products from database:

```
$sql = "SELECT * FROM products WHERE id_category = :id_category";
$query = $conn->prepare($sql);
$query->execute(array
(
    'id_category' => $id_category
));

while($row = $query->fetch(PDO::FETCH_ASSOC))
{
    extract($row);
    echo $id_product; //1, 2, 3, 4, 5, 6, 7 etc
}

```

What I need is to put the row of the product with id **5** on top, and I simply don't know how to do this. My attempts with `ORDER BY` all have failed.