Custom tag %ds_page_title% for Image Attributes Pro that returns title of Page

IAP: Custom tag %ds_page_title% to return PAGE title

/**
 * Custom tag %ds_page_title% for Image Attributes Pro that returns title of Page.
 * 
 * @param $image_id (integer) The ID of the image that is being updated. 
 * @param $parent_post_id (integer) Post to which the image is attached (uploaded) to. 
 * @param $args (array) An array containing additional arguments.
 * 
 * @return (string) Title of the page to which the image is uploaded to. Post title if page cannot be found.
 * 
 * @refer https://imageattributespro.com/codex/iaffpro_get_custom_attribute_tag_tagname/
 */
function iaffpro_get_custom_attribute_tag_ds_page_title( $image_id, $parent_post_id, $args = array() ) {

	// Find all posts that use the given image.
	$all_posts_with_image = iaffpro_get_all_posts_by_attachment_id_combined( $image_id );
	
	if ( $all_posts_with_image !== false ) {
		
		foreach ( $all_posts_with_image as $post_id ) {
			// Check post type and see if it's a WordPress page.
			$post_type = get_post_type( $post_id );

			if ( $post_type == 'page' ) {
				// Return title of the page.
				return get_the_title( $post_id );
			}
		}
	}
	
	if ( (int) $parent_post_id === 0 ) {
		return '';
	}
	
	// Return post title as fallback.
	return get_the_title( $parent_post_id );
}