php中sql变量需要单引号的时候变量如何设置？

$coupons = pdo_fetchall("select * from ".tablename('wangniu_activity')." where flag = 0 and isopen = 1 and ischeck = 1 and start_time  ".time()." and weid = ".$weid." and storeid = '".$id."'. order by type asc");

其中sql执行为：
select * from `ims_wangniu_activity` where flag = 0 and isopen = 1 and ischeck = 1 and start_time 1458445852 and weid = 2 and storeid = 'B0FFF4YWV2' . order by type asc

多了一个点，这个点怎么去掉？

回复讨论(解决方案)

... " and storeid = '".$id."' order by type asc"