Wordpress日志时间格式显示xx分钟xx小时前

Wordpress显示新增文章的时间格式为“几分钟”前，有点像微博的样式，发布日期显示为“几秒前”，“几分钱”，“几小时前”的格式。

function timeago() {
global $post;
$date = $post->post_date;
$time = get_post_time('G', true, $post);
$time_diff = time() - $time;
if ( $time_diff > 0 && $time_diff < 24*60*60 )
$display = sprintf( __('%s ago'), human_time_diff( $time ) );
else
$display = date(get_option('date_format'), strtotime($date) );

return $display;
}

add_filter('the_time', 'timeago');