新着記事にNEWアイコン(新着アイコン）を表示させたい。

<?php $posts = get_posts('numberposts=10&cat=0'); global $post;?>
<?php foreach($posts as $post): ?>
<div class="news_line"><span><?php the_time('y/m/d'); ?></span> <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"> <?php the_title(); ?></a><?php
$days=10;
$today=date('U'); $entry=get_the_time('U');
$diff1=date('U',($today - $entry))/86400;
if ($days > $diff1) {
echo '<img src="http://mk2-style.com/image/icon_new.jpg" alt="New" />';
}
?>
</div><?php endforeach; ?>