DEDECMS织梦文章内容图片加alt和title

{dede:field.body runphp=yes}
global $dsql,$id,$aid;
$myid = isset($id) ? $id : $aid;
$row = $dsql->GetOne("SELECT title FROM `dede_archives` WHERE id=$myid");
$title = $row['title'];
$str = @me;
$search = '/(<img.*?)alt=(["\'])?.*?(?(2)\2|\s)([^>]+>)/is';
$search1 = '/(<img.*?)title=(["\'])?.*?(?(2)\2|\s)([^>]+>)/is';
$content = preg_replace($search,'$1$3',$str);
$content = preg_replace($search1,'$1$3',$content);
@me = str_replace('<img', "<img alt='{$title}' title='{$title}'", $content);
{/dede:field.body}