How can one effectively troubleshoot design issues in osCommerce that arise from customizations?

Issue: Design issues in osCommerce arising from customizations can be effectively troubleshooted by reviewing the custom code and ensuring it is compatible with the osCommerce platform. This may involve checking for errors in the custom code, making adjustments to CSS styles, or reverting back to the default osCommerce design if necessary. Code snippet:

// Example code snippet for troubleshooting design issues in osCommerce

// Check custom code for errors
if (error_reporting() != 0) {
    echo "Error: Custom code contains errors. Please review and fix.";
}

// Adjust CSS styles
echo "<style>
        .custom-style {
            color: red;
            font-size: 16px;
        }
      </style>";

// Revert back to default osCommerce design
include('includes/header.php');
include('includes/column_left.php');
include('includes/column_right.php');
include('includes/footer.php');