【转】PHP日历

<?php
class Calendar
{
	var $T = array();
	var $MonthDays = array('1'=>'31','2'=>'28','3'=>'31','4'=>'30','5'=>'31','6'=>'30','7'=>'31','8'=>'31','9'=>'30','10'=>'31','11'=>'30','12'=>'31');
	var $Week=array('0'=>'日','1'=>'一','2'=>'二','3'=>'三','4'=>'四','5'=>'五','6'=>'六');
	var $Y,$M,$D;
	function __construct()
	{
		date_default_timezone_set ('prc');
		$this->Y=isset($_GET['year']) ? $_GET['year'] : date("Y");
		$this->M=isset($_GET['month']) ? $_GET['month'] : date("m");

/*		$this->Y=date('Y');
		$this->M=date('m');
*/		$this->D=date('j');
	}
	function SetTime($Y,$M,$D)
	{
		$this->Y=$Y;
		$this->M=$M;
		$this->D=$D;
	}
	function IsLeapYear()
	{
		return ($this->Y%400==0 || ($this->Y%4==0 && $this->Y%100<>0)) ? 1 : 0;
	}

	function GetMouFirDayWeek()
	{
		$time = mktime(0,0,0,$this->M,1,$this->Y);
		$time = getdate($time);
		return $time['wday'];
	}
	function ShowCalendar()
	{
		$IsLeapY = $this->IsLeapYear();
		$this->datesOFmonth[2] = $IsLeapY==1 ? 29: 28;
		?>
		<style type="text/css">
			.calendartb 
			{
				border-collapse: collapse;
				border-spacing: 0px;
				empty-cells: show;
				font-family: microsoft yahei;
			}
			td
			{
				font-size: 12px;
				text-align: center;
				padding:2px 5px 2px 6px;
			}
			.calendartb a
			{
				text-decoration: none;
			}
			.calendartb a:hover
			{
				color:rgb(255,0,0);
			}
			</style>
		<meta charset="utf-8">
		<div style="border:1px solid rgb(0,0,0);180px">
			<table class="calendartb "style="180px;border-bottom:1px solid rgb(0,0,0);">
				<tr>
					<td>
						<a href="<?php echo $this->PreYear($this->Y,$this->M);?>"><<</a>
					</td>
					<td>
						<a href="<?php echo $this->PreMouth($this->Y,$this->M);?>"><</a>
					</td>
					<td>
						<a href="?"style="color:rgb(0,0,0);"><?php echo $this->Y."年".$this->M."月";?></a>
					</td>
					<td>
						<a href="<?php echo $this->NexMouth($this->Y,$this->M);?>">></a>
					</td>
					<td>
						<a href="<?php echo $this->NexYear($this->Y,$this->M);?>">>></a>
					</td>
				</tr>
			</table>
			<table class="calendartb ">
				<tr>
					<td>日</td>
					<td>一</td>
					<td>二</td>
					<td>三</td>
					<td>四</td>
					<td>五</td>
					<td>六</td>
				</tr>
				<tr>
					<?php
						for ($s=0;$s<$this->GetMouFirDayWeek();$s++)
							echo '<td></td>';
						for ($i=1;$i<=$this->MonthDays[$this->M];$i++)
						{
							if (($i+$s)%7==1)
								echo '</tr><tr>';
							if ($i==$this->D)
								echo "<td style="color:rgb(255,0,0);font-weight:bold;">$i</td>";
							else
								echo "<td>$i</td>";
						}
					?>
				</tr>
			</table>
		</div>
		<?php
	}
	
	private function PreMouth($thisY,$thisM)
	{
		if ($thisM==1)
		{
			$thisY=$thisY-1;
			$thisM=12;
		}
		else
		{
			$thisM=$thisM-1;
		}
		return '?year='.$thisY.'&month='.$thisM;
	}
	private function NexMouth($thisY,$thisM)
	{
		if ($thisM==12)
		{
			$thisY=$thisY+1;
			$thisM=1;
		}
		else
		{
			$thisM=$thisM+1;
		}
		return '?year='.$thisY.'&month='.$thisM;
	}
	private function PreYear($thisY,$thisM)
	{
		$thisY=$thisY-1;
		return '?year='.$thisY.'&month='.$thisM;
	}
	private function NexYear($thisY,$thisM)
	{
		$thisY=$thisY+1;
		return '?year='.$thisY.'&month='.$thisM;
	}
}
?>