【求助】PHP月曆製作

　　小弟想要用PHP寫一個簡單的部落格來玩玩，但是月曆的部份有點卡住說...

　　月曆只能顯示第一個禮拜的天數...其他禮拜的都跑不出來...是不是可以請各位網友幫我看一下屍體!?
[CODE]<?php
function calendar($setdate)
{
// 設定星期參數
$week_day = array("日","一","二","三","四","五","六");
$date_count = 1;

// 取得年月日參數
if($setdate==NULL)
{
$current_yr = date("Y", time());
$current_mo = date("m", time());
$current_da = date("j", time());
} else {
$current_yr = (int)($setdate / 100);
if(($setdate % 100) > 12)
{
$current_mo = ($setdate % 100) - 12;
} else
if(($setdate % 100) < 1)
{
$current_mo = ($setdate % 100) + 12;
} else {
$current_mo = ($setdate % 100);
}
}

// 取得月份相關參數
$start_date = (intval((date("U", mktime(0,0,0,$current_mo,1,$current_yr)) / 86400)));
$start_week = date("w", mktime(0,0,0,$current_mo,1,$current_yr));
$today_date = (intval((date("U", mktime(0,0,0,$current_mo,$current_da,$current_yr)) / 86400)));
$ended_date = (intval((date("U", mktime(0,0,0,$current_mo+1,0,$current_yr)) / 86400)));
$ended_date = (strftime("%d", $ended_date));

// 輸出月曆
echo "<table width=\"150\">\n";
echo " <tr>\n";
// 先前一月
echo " <td><center><a href=\"?setdate=";
if($current_mo == 1)
{
$ym = ($current_yr-1)*100 + 12;
echo "$ym";
} else {
$ym = $current_yr*100+$current_mo-1;
echo "$ym";
}
echo "\"><strong><<</strong></a></td>\n";
// 目前月份
$ym = ($current_yr*100+$current_mo);
echo " <td><center><a href=\"?setdate=$ym\"><strong>";
switch($current_mo)
{
case 1 : echo "$current_yr"." Jan"; break;
case 2 : echo "$current_yr"." Feb"; break;
case 3 : echo "$current_yr"." Mar"; break;
case 4 : echo "$current_yr"." Apr"; break;
case 5 : echo "$current_yr"." May"; break;
case 6 : echo "$current_yr"." Jun"; break;
case 7 : echo "$current_yr"." Jul"; break;
case 8 : echo "$current_yr"." Aug"; break;
case 9 : echo "$current_yr"." Sep"; break;
case 10: echo "$current_yr"." Oct"; break;
case 11: echo "$current_yr"." Nov"; break;
default: echo "$current_yr"." Dec";
}
echo "</strong></a></td>\n";
// 之後一月
echo " <td><center><a href=\"?setdate=";
if($current_mo == 12)
{
$ym = ($current_yr+1)*100 + 1;
echo "$ym";
} else {
$ym = $current_yr*100+$current_mo+1;
echo "$ym";
}
echo "\"><strong>>></strong></a></td>\n";
echo " </td>\n";
echo "</table>\n";

echo "<table width=\"170\">\n";
echo " <tr>\n";
// 輸出星期序列
for($a=0;$a<7;$a++){
if($a==0 || $a==6)
{
echo "<td><center><font color=\"FF0000\"><strong>$week_day[$a]</strong></font></center></td>\n";
} else {
echo "<td><center><strong>$week_day[$a]</strong></center></td>\n";
}
}
echo "</tr>\n";
// 輸出月曆部份
for($i=1;$i<=6;$i++){
if($date_count > $ended_date)
{
$date_count = 1;
break;
}
echo " <tr align=\"center\" valign=\"middle\">";
for($row=1;$row<8;$row++){
if($row<=$start_week)
{
echo " <td>&nbsp;</td>";
} else {
if($date_count==$current_date)
{
echo " <td bgcolor=\"#DBBE94\"><strong>$date_count</strong></td>";
} else {
echo " <td>$date_count</td>";
}
$date_count++;
}
}
echo "</tr>";
}
echo "</table>";
}
?>[/CODE]