How can a PHP beginner debug code when register_globals is causing issues?

When register_globals is causing issues in PHP, a beginner can debug the code by checking for any variables that may be conflicting with each other due to the register_globals setting. To solve this issue, the beginner can use $_GET, $_POST, or $_REQUEST superglobals to access form data instead of relying on register_globals. By explicitly referencing these superglobals, the beginner can ensure that variables are properly scoped and avoid conflicts.

// Before fixing the issue
$variable = $_REQUEST['variable'];

// After fixing the issue
$variable = $_REQUEST['variable'];