function display_image_gallery_shortcode($atts) {
    // Set up default attributes for the shortcode
    $atts = shortcode_atts(
        array(
            'pod_name' => 'dogs',  // Replace with your actual pod name
            'field_name' => 'dog_gallery',  // Replace with your actual image field name
        ),
        $atts,
        'image_gallery'
    );

    // Get the Pod
    $gallery = pods($atts['pod_name']); 
    
    // Start the output buffer to return the HTML
    ob_start();
    
    // Check if there are any items in the Pod
    if ($gallery->total() > 0) {
        // Start the gallery container
        echo '<div class="image-gallery">';
        
        // Loop through the Pod items
        while ($gallery->fetch()) {
            // Get the list of image URLs (space-separated)
            $image_urls = $gallery->field($atts['field_name']);
            
            // Split the string into an array of image URLs
            $image_array = explode(' ', $image_urls); // Split by space
            
            // Loop through the image array and display each image
            foreach ($image_array as $image_url) {
                // Display each image in a gallery item
                echo '<div class="gallery-item">';
                echo '<a href="' . esc_url(trim($image_url)) . '" data-lightbox="gallery">';
                echo '<img src="' . esc_url(trim($image_url)) . '" alt="Gallery Image">';
                echo '</a>';
                echo '</div>';
            }
        }

        // End the gallery container
        echo '</div>';
    }

    // Return the gallery HTML
    return ob_get_clean();
}

// Register the shortcode
add_shortcode('image_gallery', 'display_image_gallery_shortcode');