給DIV添加特色圖片代碼

下面是我使用的部分代碼：

<!--獲取上下篇日志的鏈接、標題、特色圖像-->
	<div class="post-PrevNext">
	<?php
		$current_category = get_the_category();//獲取當前文章所屬分類ID
		$prev_post = get_previous_post($current_category,'');//與當前文章同分類的上一篇文章
		$next_post = get_next_post($current_category,'');//與當前文章同分類的下一篇文章
	?>
	<!--上一篇-->
	
		<div class="previous_post_link" style="background-image: url(<?php
$full_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($prev_post->ID), 'full');
echo $full_image_url[0];
?>);
		background-repeat:round;						   
cursor: pointer;" onclick="window.location='<?php echo get_permalink( $prev_post->ID ); ?>';
						   opacity:0.8;">
			<!--1,設置特色圖片為背景。2、大圖像貼合小div、3給div加超級鏈接-->
			
			
			<div class="previous_post_link_bg">
				
		<?php if (!empty( $prev_post )): ?>
		
			<div class="single-more">
				<div class="single-more-1">上一篇</div>
			
	<a style="color: #FFFFFF;" href="<?php echo get_permalink( $prev_post->ID ); ?>"><?php echo $prev_post->post_title; ?></a>
			<br>
			<div class="single-more-1">
				<!--創建博文時間：--><a style="color: #a59d9c"><?php the_time( 'Y.m.d' ); ?></a>
			</div>
				</div>
		<?php endif; ?>
				</div>
	</div>
		
		
		
		<!--下一篇博文導航-->
	<div class="next_post_link" style="background-image: url(<?php
		$full_image_url = wp_get_attachment_image_src( get_post_thumbnail_id($next_post->ID), 'full');
		echo $full_image_url[0];?>); 
		background-repeat:round;
		cursor: pointer;" onclick="window.location='<?php echo get_permalink( $next_post->ID ); ?>';">
		
		<div class="previous_post_link_bg">
		<?php if (!empty( $next_post )): ?>
		<a href="<?php echo get_permalink( $next_post->ID ); ?>"><!--獲取博文鏈接-->
			<!--獲取特色圖片-->
		</a> 
		
			<div class="single-more">
				<div class="single-more-1">下一篇</div>
			
		<a style="color: #FFFFFF;" href="<?php echo get_permalink( $next_post->ID ); ?>">
			<?php echo $next_post->post_title; ?>
			</a>
			<br>
		<!--創建博文時間：-->
				<div class="single-more-1">
				<a style="color: #a59d9c"><?php the_time( 'Y.m.d' ); ?></a>
					</div>
			</div>
			</div>
		<?php endif; ?>
		</div>
		</div>

?完整?的代碼請查看single.php文件：

下載：