帝国CMS为正文中的图片自动添加alt文字说明

function user_AddImgAlt($mid,$f,$isadd,$isq,$value,$cs){
$value=stripSlashes($value);
$title=stripSlashes($_POST['title']);
$title=str_replace('"','',$title);
$zz2="//<(img|IMG) (.*?)alt="(.*?)"(.*?)>/is";
$text=preg_replace($zz2,"<//1 //2//4>",$value);
$zz1="//<(img|IMG) (.*?)>/is";
$text=preg_replace($zz1,"<//1 alt="{$title}" //2>",$text);
return $text;
}