5.
function user_imgalt($mid,$f,$isadd,$isq,$value,$cs){
$title=$_POST['title'];
$htmls=$value;
$pattern = "/<img[^>]+>/";
preg_match_all($pattern, $htmls, $matches);
for ($i=0; $i<=count($matches[0]); $i++) {
preg_match("/alt=".+?"/",$matches[0][$i],$altimg);
preg_match("/title=".+?"/",$matches[0][$i],$titleimg);
if(!$altimg)$htmls=str_replace("<img","<img alt="{$title}"",$htmls);
if(!$titleimg)$htmls=str_replace("<img","<img title="{$title}"",$htmls);
}
return $htmls;
}