使用内置post附件有什么问题

$args = array(
    \'post_type\' => \'attachment\',
    \'numberposts\' => null,
    \'post_status\' => null,
    \'post_parent\' => $post->ID
);
$attachments = get_posts($args);
if ($attachments) {
    foreach ($attachments as $attachment) {
        echo apply_filters(\'the_title\', $attachment->post_title);
        the_attachment_link($attachment->ID, false);
    }
}