mysql诡异问题，求教

PHP code

$sql="select * from {$BIAOTOU}lottery_result where to_days(now())=to_days(lotterydate) and username='{$_SESSION["duoduouser"]}' and lotteryid={$lotteryid}";

    echo $sql;
    exit;

输出
?select * from duoduo_lottery_result where to_days(now())=to_days(lotterydate) and username='wzxinchen' and lotteryid=23
大家试试把这句拿到命令行分析一下，看看语法过不过关
我这里连语法都不过关
把select这个词重写一下就过关了，为神马啊？编码都是统一的

------解决方案--------------------
改个select 就过关了,那也只有你才能知道了...哈哈哈