What potential issues should be considered when setting up automatic website updates in PHP?

Issue: One potential issue to consider when setting up automatic website updates in PHP is the security risk of allowing automatic updates without proper validation and authentication. This could potentially open up the website to vulnerabilities if not implemented correctly.

// Example of implementing authentication before allowing automatic updates
if ($_GET['secret_key'] === 'your_secret_key') {
    // Allow automatic updates to proceed
    // Include code for automatic updates here
} else {
    // Unauthorized access, deny automatic updates
    die('Unauthorized access');
}