dedecms织梦图集在首页列表页调用并且自定义输出几张的教程

function Getimgurls($aID,$num=4)   {    global $dsql;    $imgurls = $result = '';    $imgrow = $dsql->Getone( "Select imgurls From `mydiy_addonimages` where aID='$aID' ");    $imgurls = $imgrow['imgurls'];    if($imgurls != '')    {        $dtp = new DedeTagParse();        $dtp->LoadSource($imgurls);        $images = array();        if(is_array($dtp->CTags))        {            foreach($dtp->CTags as $ctag)            {                if($ctag->Getname() == 'img')                {                    $row = array();                    $row['wIDth'] = $ctag->GetAtt('wIDth');                    $row['height'] = $ctag->GetAtt('height');                    $row['imgsrc'] = trim($ctag->GetInnerText());                    $row['text'] = $ctag->GetAtt('text');                    $images[] = $row;                }            }        }        $dtp->Clear();        $i = 0;        foreach($images as $row)        {            if($i == $num) break;            if($row['imgsrc'] != '')            {                $result .= "