What is the potential issue with using $id as a variable in the PHP code provided?

Using $id as a variable in the provided PHP code can potentially lead to conflicts or unexpected behavior if $id is already defined or used elsewhere in the code. To avoid this issue, it's best practice to choose a more unique or specific variable name that is less likely to clash with existing variables.

// Fix: Change $id to a more specific variable name like $product_id
$product_id = $_GET['id'];