PHP实现的简单日历代码

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//calendar.php

<?
/*******************************
* 用来判断是否闰年的函数 *
* 可以根据更复杂的算法改进 *
*******************************/
function leap_year($year)
{
if($year% 4 == 0) // basic rule
{
return true; // is leap year
}
else
{
return false;
}
}

/*******************************
* 对一些变量进行赋值操作 *
* 特别注意对二月份的赋值 *
*******************************/
function setup()
{
global $mon_num;
$mon_num=array(31,30,31,30,31,30,31,31,30,31,30,31);
global $mon_name;
$mon_name=array("一","二","三","四",
"五","六","七","八",
"九","十","十一","十二");
if (leap_year($firstday[year])) // basic rule
{
$mon_num[1]=29; // is leap year
}
else
{
$mon_num[1]=28;
}
}

/*******************************
* 显示表格中的一格 *
* 显示的内容和颜色可变 *
*******************************/
function showline($content,$show_color)
{
$begin_mark = "<TD WIDTH=60 HEIGHT=25>";
$begin_mark =$begin_mark."<FONT COLOR=$show_color>";
$end_mark = "</FONT></TD>";
echo $begin_mark.$content.$end_mark ;
}

?>


<html>

<head>

<title>
社区日历
</title>

<meta http-equiv=content-type content="text/html; charset=gb2312">

<head>

<body>

<?
//获得当前的日期
$firstday = getdate(mktime(0,0,0,date("m"),1,date("Y")));

setup();

//显示表格的名称
echo "<CENTER>";
echo "<TABLE BORDER=2 CELLSPACING=4>";
echo "<TH COLSPAN=7 HEIGHT=50>";
echo "<FONT COLOR=red SIZE=3 >";
echo "$firstday[year]年 &nbsp".$mon_name[$firstday[mon]-1]."月&nbsp月历";
echo "</FONT>";
echo "</TH>";

//表头
$weekDay[0] = "日";
$weekDay[1] = "一";
$weekDay[2] = "二";
$weekDay[3] = "三";
$weekDay[4] = "四";
$weekDay[5] = "五";
$weekDay[6] = "六";

echo "<TR ALIGN=/"center/" VALIGN=/"center/">";

//显示表格的第一行
for ($dayNum = 0; $dayNum < 7; ++$dayNum) {
showline($weekDay[$dayNum],"red");
}

echo"</TR>";

$toweek=$firstday[wday];//本月的第一天是星期几
$lastday=$mon_num[$firstday[mon]-1];//本月的最后一天是星期几
$day_count = 1;//当前应该显示的天数
$up_to_firstday = 1;//是否显示到本月的第一天

for ($row = 0; $row <= ($lastday+$toweek-1)/7; ++$row)//本月有几个星期
{echo "<TR ALIGN=center VALIGN=center>";
for ($col=1; $col<=7; ++$col)
{
//在第一天前面显示的都是"空"
if (($up_to_firstday <= $toweek) ||($day_count>$lastday))
{
echo "<TD>&nbsp</TD>";
$up_to_firstday++;
}
else
{
//显示本月中的某一天
showline($day_count,"blue");
$day_count++;
}
}
echo "</TR>";
}

echo "</TABLE>";
echo "</CENTER>";
?>
</body>
</html>