这样写错哪了好像只能清理第一个数据库

这样写哪里错了好像只能清理第一个数据库
$today=date('Ymd');
$date=date("Ymd",strtotime($today."-3 day"));
$arr=array('baidudy','aamm1');
foreach($arr as $value){
mysql_select_db('$value');
mysql_query("DELETE FROM `clicked` WHERE `date` < '$date'");
mysql_query("DELETE FROM `clickip` WHERE `date` < '$date'");
}

------解决方案--------------------

PHP code

foreach($arr as $value){
mysql_select_db("$value");
mysql_query("DELETE FROM `clicked` WHERE `date` < '$date'");
mysql_query("DELETE FROM `clickip` WHERE `date` < '$date'");
}
echo "循环完了";