<?php
$monthoneday=date("Ym")."01";
$oneweekday=date("w",strtotime($monthoneday)); //获得本月1号星期几
$monthday=date("t"); //本月多少天
$startlow=($oneweekday==0)?7:$oneweekday; //从第几列开始

for($a=1,$b=$startlow;$a<=$monthday;$a++,$b++){
$ary[$b]=$a; //用数组控制日期在哪里输出
}
$c=1;
//输出行数等于当月天数除7取整再加1
for($a=1;$a<=(int)($monthday/7)+1;$a++){
echo "<tr>";
//我是用数组的key来控制在哪能里输出的
for($b=1;$b<=7;$b++,$c++){
if($ary[$c]==date("j")){
echo '<td id="today">';
}else{
echo "<td>";
}
echo $ary[$c];
echo "</td>";
echo "\n";
}
echo "</tr>";
}
?>