同时操作多条信息，使用关键字in

$pid=$_POST['lianpiaono'];
$darr=explode(",", $pid);
$cnt=count($darr);//统计数据个数
foreach ($darr as $key => $value) {
    $str.="'".$value."',";
}
$str=substr($str,0,$str.length-1);
$nos = $this->db->where("lianpiaono in ($str) and isclose=0 and jqid=$jqid")->field('lianpiaono,id,status')->select();