<?
$day_name=array("日","一","二","三","四","五","六");
$today=intval(date("w"));
echo "星期".$day_name[$today]; 
echo "<br />";
echo "星期".$day_name[($today+1)%7];  //明天
echo "<br />";
echo "星期".$day_name[($today+2)%7]; //后天
echo "<br />";
echo "星期".$day_name[($today+3)%7]; //大后天
?>