Multiple Post Thumbnails

<?php if (class_exists('MultiPostThumbnails')) {
    $mpt_images = array(
        'secondary',
        'tertiary',
        'quaternary',
        'quinary',
        'senary',
        'septenary',
        'octonary',
        'nonary',
        'denary',
    );

    foreach ($mpt_images as $mpt_image) {
        if (MultiPostThumbnails::has_post_thumbnail('post', "{$mpt_image}-image")) {
        MultiPostThumbnails::the_post_thumbnail('post', "{$mpt_image}-image");
        }
    }
}
?>