In what ways can the code be modified to make it more scalable and maintainable for future updates or additions to the gallery feature?

To make the code more scalable and maintainable for future updates or additions to the gallery feature, we can separate the logic for displaying the gallery into its own function. This will make it easier to make changes or add new features to the gallery without affecting other parts of the code.

// Function to display the gallery
function display_gallery($images) {
    echo '<div class="gallery">';
    foreach($images as $image) {
        echo '<img src="' . $image . '" alt="Gallery Image">';
    }
    echo '</div>';
}

// Usage example
$images = array('image1.jpg', 'image2.jpg', 'image3.jpg');
display_gallery($images);