PHP学习笔记之皇历

PHP学习笔记之万年历
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>万年历</title>
<?php
	$MONTH = array("元月","壹 月","贰 月","叁 月","肆 月","伍 月","陆 月","柒 月","捌 月","玖 月","拾 月","拾壹月","拾贰月");
	$enMONTH = array("元月","January" ,"February" ,"Marcy" ,"April" ,"May" ,"June" ,"July" ,"August" ,"September" ,"October" ,"November" ,"December");
	$WEEK = array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
	$BACKCOLOR = array("#FFC" , "#FFF" , "#9F6" , "#FFC" , "#6F0" , "#6F6" , "#F90" , "#F06" , "#F00" , "#FC3" , "#FF6" , "#F99");
	$ChineseNum = array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九");
	
	function ChangeNum($str)
	{
		global $ChineseNum;
		
		for ($i=0; $i<=9; $i++)
		{
			$s = (string)$i;
		  	$str = str_replace($s, $ChineseNum[$i], $str);
		}
		
		return $str;
	}
	
	function MonthDays($year, $month)//根据输入的年号和月份，返回该月的天数    
	{
		switch($month)
		{
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:  return 31;
			case 4:
			case 6:
			case 9:
			case 11:  return 30;
			case 2:   if (($year%4 == 0 && $year%100 != 0) || $year%400 == 0)
						  return 29; 
					  else
						  return 28;
			default: die("这是一个错误的月份！");
		 }
	}
	
	function WeekDay($year, $month, $day) //根据输入的日期，返回对应的星期
	{
		$commonYear = 0;
		$leapYear = 0;
		
		for ($i=1; $i<$year; $i++) 
		{
			if (($i%4 == 0 && $i%100 != 0) || $i%400 == 0)
			{
				$leapYear++;
			}
			else
			{
				$commonYear++;
			}
		}
		$sum = 366 * $leapYear + 365 * $commonYear;
		
		for ($i=1; $i<$month; $i++) 
		{
			$sum += MonthDays($year, $i);
		}
		
		$sum += $day;   //获得总天数 
		
		return (int) $sum % 7;
	}
	
	function PrintMon($year, $month)
	{
		global $MONTH;
		global $enMONTH;
		global $WEEK;
		global $BACKCOLOR;
		
		$color = $BACKCOLOR[$month]; //设置月历的背景颜色
		
		echo("<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\" bgcolor=\"$color\">");
		$ym = ChangeNum($year) . "年 ". $MONTH[$month];
		echo("<caption><h1>$ym</h1></caption>");
		echo("<tr>");
		for ($i=0; $i<7; $i++) //输出星期几
		{
			echo("<td width=\"90\", height=\"40\" align=\"center\" >");
			echo("<h2>$WEEK[$i]</h2>");
			echo("</td>");
		}
		echo("</tr>");
		
		$theDay = 1;
		$numOfDays = MonthDays($year, $month);//根据输入的年号和月份，返回该月的天数  
		$theWeek = WeekDay($year, $month, $theDay); //根据输入的日期，返回对应的星期几
		for ($i=0; $i<6; $i++)
		{
			echo("<tr>");
			for ($j=0; $j<7; $j++)
			{
				echo("<td width=\"90\", height=\"40\" align=\"center\" >");
				if ($theDay <= $numOfDays && $theWeek == $j)//把日期输出到对应的星期几所在列，并注意不要超出本月日期
				{
					echo("<h2>$theDay</h2>");
					$theDay++;
					$theWeek = ($theWeek + 1) % 7;//更新星期
				}
				echo("</td>");
			}
			echo("</tr>");
			if ($theDay > $numOfDays) //如果已经输出全部日期，结束循环
			{
				$i = 6;
			}
		}
		
		echo("</table");
	}  
?>
</head>

<body>
    <form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
      <h1>请输入要查看的年号和月份</h1>
      <input type="text" name="myYear">年<input type="text" name="myMonth">月
      <input type="submit">
    </form>
    
    <?php
	  $year = (int) $_POST['myYear'];  
	  $month = (int) $_POST['myMonth']; 
	  
	  if ($year > 0)
	  {  
		if ($month >= 1 && $month <=12)
		{
		  PrintMon($year, $month);
		}
		else if($month != NULL)
		{
		  echo("月份不对" . "<br />");
		}
	  }
	  else if($year != NULL)
	  {
		echo("年份不对" . "<br />");
	  }
    ?>
    

</body>
</html>
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