织梦怎么让文章中图片自动添加ALT属性

function replaceurl($newurl)
{
global $dsql,$id;
//获取图片附加表imgurls字段内容进行处
$row = $dsql->GetOne("SELECT title FROM dede_archives where id=$id");
//替换图片Alt为文档标题
$newurl=str_ireplace(array('alt=""','alt=/'/''),'',$newurl);
$newurl=preg_replace("@ [/s]{0,}alt[/s]{0,}=[/"'/s]{0,}[/s/S]{0,}[/"'/s] @isU"," ",$newurl);
$newurl=str_ireplace("<img " ,"<img  alt=/"".$row['title']."/"",$newurl);
//去掉结尾空格
$newurl=str_ireplace(" /","/",$newurl);
$newurl=str_ireplace(" />","/>",$newurl);
return $newurl;
}

//文章body优化替换
function replaceurl($newurl)
 {
global $dsql,$id;
//获取图片附加表imgurls字段内容进行处
$row = $dsql->GetOne("SELECT title FROM dede_archives where id=$id");
//去掉img的width和height
$newurl=preg_replace('/style=/"width/:(.*)/"/','',$newurl);
//替换图片Alt为文档标题
$newurl=str_ireplace(array('alt=""','alt=/'/''),'',$newurl);
$newurl=preg_replace("@ [/s]{0,}alt[/s]{0,}=[/"'/s]{0,}[/s/S]{0,}[/"'/s] @isU"," ",$newurl);
$newurl=str_ireplace("<img " ,"<img  alt=/"".$row['title']."/"",$newurl);
//去掉结尾空格
$newurl=str_ireplace(" /","/",$newurl);
$newurl=str_ireplace(" />","/>",$newurl);
return $newurl;
 }