Custom tag %pr_yoastmetadesc% for Image Attributes Pro that returns Yoast Meta Description.

IAP: Custom tag %pr_yoastmetadesc% for Yoast Meta Description.

/**
 * Custom tag %pr_yoastmetadesc% for Image Attributes Pro that returns Yoast Meta Description.
 * 
 * @link https://yoast.com/developer-blog/yoast-seo-14-0-using-yoast-seo-surfaces/
 * 
 * @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) Yoast Meta Description.
 * 
 * @refer https://imageattributespro.com/codex/iaffpro_get_custom_attribute_tag_tagname/
 */
function iaffpro_get_custom_attribute_tag_pr_yoastmetadesc( $image_id, $parent_post_id, $args = array() ) {
	
	if ( $parent_post_id == 0 ) {
		return;
	}

	if ( ! function_exists( 'YoastSEO' ) ) {
		return '';
	}

	return YoastSEO()->meta->for_post( $parent_post_id )->meta_description;
}