织梦dedecms 调用文章图片数功能

function BodyImgNum($aid)
{
global $dsql;
$sql = "select aid,body from dede_addonarticle where aid='$aid' ";
$arcRow = $dsql->GetOne($sql);
$body = $arcRow['body'];
$img_array = array();
$patte="/<[img|IMG].*?src=[\'|\"](.*?(?:[\.gif|\.jpg]))[\'|\"].*?[\/]?>/i";
preg_match_all($patte,$body,$img_array);
$img_array = array_unique($img_array[1]);
$num = count($img_array);
return $num;