📄 calendar.php
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<?php
class Calendar
{
/*
Calendar类的构造函数
*/
function Calendar()
{
}
/*
取得描述一周中各天的数组。该数组包含七个元素
每个元素代表其中的一天。从Sunday开始。
*/
function getDayNames()
{
return $this->dayNames;
}
/*
设定描述一周中各天的数组。该数组包含七个元素
每个元素代表其中的一天。从Sunday开始。
*/
function setDayNames($names)
{
$this->dayNames = $names;
}
/*
取得描述一年中各月的数组。该数组包含十二个元素
每个元素代表一个月份。从January开始。
*/
function getMonthNames()
{
return $this->monthNames;
}
/*
设定描述一年中各月的数组。该数组包含十二个元素
每个元素代表一个月份。从January开始。
*/
function setMonthNames($names)
{
$this->monthNames = $names;
}
/*
取得一周的第一天，它在日历中显示在第一列中。
*/
function getStartDay()
{
return $this->startDay;
}
/*
设定一周的第一天，它在日历中显示在第一列中。 */
function setStartDay($day)
{
$this->startDay = $day;
}
/*
取得一年中的第一个月份
*/
function getStartMonth()
{
return $this->startMonth;
}
/*
设定一年的第一个月份
*/
function setStartMonth($month)
{
$this->startMonth = $month;
}
/*
用来显示给定的$year和$month的日历。如果需要使日历的"forward"和"back"按钮
生效，就要覆盖这个方法。如果这个函数返回空,则不会显示"forward"和"back"按钮。
这是默认的情况。
*/
function getCalendarLink($month, $year)
{
return "";
}
/*
返回给定日期$day,$month,$year的URL链接。
如果要使用日历的这项功能就要重写这个函数。
如果函数返回空，则不会使用这个功能。这是默认的情况。
*/
function getDateLink($day, $month, $year)
{
return "";
}
/*
返回当前月份的HTML
*/
function getCurrentMonthView()
{
$d = getdate(time());
return $this->getMonthView($d["mon"], $d["year"]);
}
/*
返回本年份的HTML
*/
function getCurrentYearView()
{
$d = getdate(time());
return $this->getYearView($d["year"]);
}
/*
返回指定月份的HTML
*/
function getMonthView($month, $year)
{
return $this->getMonthHTML($month, $year);
}
/*
返回指定年份的HTML
*/
function getYearView($year)
{
return $this->getYearHTML($year);
}
/********************************************************************************
下面是所有的私有方法。没有用户直接调用的部分。
用户不要直接调用这里面的方法。
*********************************************************************************/
/*
计算一个月的天数，考虑闰年的情况。
*/
function getDaysInMonth($month, $year)
{
if ($month < 1 || $month > 12)
{
return 0;
}
$d = $this->daysInMonth[$month - 1];
if ($month == 2)
{
// 检查是否为闰年
if ($year%4 == 0)
{
if ($year%100 == 0)
{
if ($year%400 == 0)
{
$d = 29;
}
}
else
{
$d = 29;
}
}
}
return $d;
}
/*
生成指定月份的HTML
*/
function getMonthHTML($m, $y, $showYear = 1)
{
$s = "";
$a = $this->adjustDate($m, $y);
$month = $a[0];
$year = $a[1];
$daysInMonth = $this->getDaysInMonth($month, $year);
$date = getdate(mktime(12, 0, 0, $month, 1, $year));
$first = $date["wday"];
$monthName = $this->monthNames[$month - 1];
$prev = $this->adjustDate($month - 1, $year);
$next = $this->adjustDate($month + 1, $year);
if ($showYear == 1)
{
$prevMonth = $this->getCalendarLink($prev[0], $prev[1]);
$nextMonth = $this->getCalendarLink($next[0], $next[1]);
}
else
{
$prevMonth = "";
$nextMonth = "";
}
$header = $monthName . (($showYear > 0) ? " " . $year : "");
$s .= "<table class=\"calendar\">\n";
$s .= "<tr>\n";
$s .= "<td align=\"center\" valign=\"top\">" . (($prevMonth == "") ? " " : "<a href=\"$prevMonth\"><<</a>") . "</td>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\" colspan=\"5\">$header</td>\n";
$s .= "<td align=\"center\" valign=\"top\">" . (($nextMonth == "") ? " " : "<a href=\"$nextMonth\">>></a>") . "</td>\n";
$s .= "</tr>\n";
$s .= "<tr>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\">" . $this->dayNames[($this->startDay)%7] . "</td>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\">" . $this->dayNames[($this->startDay+1)%7] . "</td>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\">" . $this->dayNames[($this->startDay+2)%7] . "</td>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\">" . $this->dayNames[($this->startDay+3)%7] . "</td>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\">" . $this->dayNames[($this->startDay+4)%7] . "</td>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\">" . $this->dayNames[($this->startDay+5)%7] . "</td>\n";
$s .= "<td align=\"center\" valign=\"top\" class=\"calendarHeader\">" . $this->dayNames[($this->startDay+6)%7] . "</td>\n";
$s .= "</tr>\n";
// We need to work out what date to start at so that the first appears in the correct column
$d = $this->startDay + 1 - $first;
while ($d > 1)
{
$d -= 7;
}
// Make sure we know when today is, so that we can use a different CSS style
$today = getdate(time());
while ($d <= $daysInMonth)
{
$s .= "<tr>\n";
for ($i = 0; $i < 7; $i++)
{
$class = ($year == $today["year"] && $month == $today["mon"] && $d == $today["mday"]) ? "calendarToday" : "calendar";
$s .= "<td class=\"$class\" align=\"right\" valign=\"top\">";
if ($d > 0 && $d <= $daysInMonth)
{
$link = $this->getDateLink($d, $month, $year);
$s .= (($link == "") ? $d : "<a href=\"$link\">$d</a>");
}
else
{
$s .= " ";
}
$s .= "</td>\n";
$d++;
}
$s .= "</tr>\n";
}
$s .= "</table>\n";
return $s;
}
/*
生成指定年份的HTML
*/
function getYearHTML($year)
{
$s = "";
$prev = $this->getCalendarLink(0, $year - 1);
$next = $this->getCalendarLink(0, $year + 1);
$s .= "<table class=\"calendar\" border=\"0\">\n";
$s .= "<tr>";
$s .= "<td align=\"center\" valign=\"top\" align=\"left\">" . (($prev == "") ? " " : "<a href=\"$prev\"><<</a>") . "</td>\n";
$s .= "<td class=\"calendarHeader\" valign=\"top\" align=\"center\">" . (($this->startMonth > 1) ? $year . " - " . ($year + 1) : $year) ."</td>\n";
$s .= "<td align=\"center\" valign=\"top\" align=\"right\">" . (($next == "") ? " " : "<a href=\"$next\">>></a>") . "</td>\n";
$s .= "</tr>\n";
$s .= "<tr>";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(0 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(1 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(2 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "</tr>\n";
$s .= "<tr>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(3 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(4 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(5 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "</tr>\n";
$s .= "<tr>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(6 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(7 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(8 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "</tr>\n";
$s .= "<tr>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(9 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(10 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "<td class=\"calendar\" valign=\"top\">" . $this->getMonthHTML(11 + $this->startMonth, $year, 0) ."</td>\n";
$s .= "</tr>\n";
$s .= "</table>\n";
return $s;
}
/*
调整日期使月份在0和13之间。例如：2000年13月为2001年1月。
*/
function adjustDate($month, $year)
{
$a = array();
$a[0] = $month;
$a[1] = $year;
while ($a[0] > 12)
{
$a[0] -= 12;
$a[1]++;
}
while ($a[0] <= 0)
{
$a[0] += 12;
$a[1]--;
}
return $a;
}
/*
一周的第一天。在日历中显示在第一列。
*/
var $startDay = 0;
/*
一年的第一个月份。在日历中首先显示。
*/
var $startMonth = 1;
/*
标志一周中各天的标签。
第一天为Sunday.
*/
var $dayNames = array("S", "M", "T", "W", "T", "F", "S");
/*
一年中各月的名字
*/
var $monthNames = array("January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December");
/*
一年中各月份的天数。第一个元素代表一月的天数。
*/
var $daysInMonth = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
}
?>
<html>
<head>
<style type="text/css">
TABLE.calendar{
border-style:solid;
}
TD.calendarToday{
background:yellow;
}
</style>
</head>
<body>
<?php
$calendar = new Calendar; //初始化类Calendar的一个实例
echo $calendar -> getCurrentMonthView(); //显示当月的日历
//echo $calendar -> getCurrentYearView();
?>
</body>
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