wordpress带缩略图的上一篇、下一篇文章代码

<?php 
//上一篇
	$prevPost = get_previous_post(true);
	if($prevPost){
		$prevThumbnail = get_the_post_thumbnail($prevPost->ID, array(100,100));
		previous_post_link('%link',"$prevThumbnail %title", TRUE);
	} 
//下一篇 
	$nextPost = get_next_post(true);
	if($nextPost){ 
		$nextThumbnail = get_the_post_thumbnail($nextPost->ID, array(100,100) );
		next_post_link('%link',"$nextThumbnail %title", TRUE);
	} 
?>