discuz图片处理缩略图显示的方法

function thumblist($pid, $width = 0, $height = 0, $maximgcount = 3, $tid = 0){
global $_G;
if(!$pid) return array();
$width = intval($width);
$height = intval($height);
$maximgcount = intval($maximgcount);
$tid = intval($tid);
$maximgcount = $maximgcount <= 0 ? 3 : $maximgcount;
$maximgcount = min($maximgcount, 3);
$width = $width <= 0 ? 200 : $width;
$height = $height <= 0 ? 100 : $height;
if(!$tid) {
$tid = C::t('forum_post')->fetch_tid_by_pid($pid);
}
if(!$tid) return array();
$attachments = C::t('forum_attachment_n')->fetch_all_by_id('tid:'.$tid, 'pid', $pid, 'aid', true, false, false, $maximgcount);
$list = array();
$count = 0;
$nums = count($attachments);
if($nums ==1){
$width = 692;
$height =708;
} elseif ($nums == 2) {
$width = 660;
$height = 700;
} else if($nums ===3){
$width = 440;
$height = 532;
}
foreach($attachments as $aid=>$attachment) {
$bigimage = $_G['setting']['attachurl'].'forum/'.$attachment['attachment'];
$thumbfile = 'image/'.helper_attach::makethumbpath($attachment['aid'], $width, $height);
if(is_file($_G['setting']['attachdir'].$thumbfile)) {
$thumbfile = $_G['setting']['attachurl'].$thumbfile;
} else {
$thumbfile = '/'.getforumimg($attachment['aid'], 0, $width, $height,'fixwr');
}
if($attachment['width'] < $width) $thumbfile = $bigimage;
$list[] = array('thumb'=>$thumbfile, 'attachment'=>$bigimage, 'aid'=>$attachment['aid']);
$count++;
if($count >= $maximgcount) break;
}
return $list;
}

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