<?php
// Error reporting for development - REMOVE OR CHANGE IN PRODUCTION
echo '<h1>Payment Error</h1>';
echo '<p>There was an error processing your payment. Please try again or contact support if the issue persists.</p>';
if (isset($_GET['session_id']) && $_GET['session_id'] === 'invalid_session') {
    echo '<p>Error Code: Invalid Session. Please ensure you are using a valid session link.</p>';
}
