php写的给出一个年份和月份输出该月的天数

时间：2025-02-09 20:59:43

第一种方法：

<html>
<head>
<title>给出一个年份和月份输出该月的天数</title>
</head>
<?php 
$nian=$yue=$tian='';

if($_POST){
	$nian=$_POST['nian'];
	$yue=$_POST['yue'];
	switch($yue){
		case 1:
			$tian=31;
			break;
		case 2:
			if(isRunnian($nian)){
				$tian=29;
			}else{
				$tian=28;
			}
			break;
		case 3:
			$tian=31;
			break;
		case 4:
			$tian=30;
			break;
		case 5:
			$tian=31;
			break;
		case 6:
			$tian=30;
			break;
		case 7:
			$tian=31;
			break;
		case 8:
			$tian=31;
			break;
		case 9:
			$tian=30;
			break;
		case 10:
			$tian=31;
			break;
		case 11:
			$tian=30;
			break;
		case 12:
			$tian=31;
			break;
		default :
			$tian='月份数据有误';
	}
}

function isRunnian($y){
	if($y % 4 == 0 && $y % 100 != 0  || $y % 400 == 0){
		return true;
	}
	else{
		return false;
	}
}
?>
<body>
<form method="post" action="">

年：<input type="text" name="nian" value="<?php echo $nian?>"> 月：<input type="text" name="yue" value="<?php echo $yue;?>"><input type="submit" value="输出">：<input type="text" name="tian" value="<?php echo $tian;?>">

</form>

</body>


</html>

第二种方法： 

<html>
<head>
<title>给出一个年份和月份输出该月的天数</title>
</head>
<?php 
$nian=$yue=$tian='';

if($_POST){
	$nian=$_POST['nian'];
	$yue=$_POST['yue'];
	switch($yue){
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
			$tian=31;
			break;
		case 2:
			if(isRunnian($nian)){
				$tian=29;
			}else{
				$tian=28;
			}
			break;
		case 4:
		case 6:
		case 9:
		case 11:
			$tian=30;
			break;
		default :
			$tian='月份数据有误';
	}
}

function isRunnian($y){
	if($y % 4 == 0 && $y % 100 != 0  || $y % 400 == 0){
		return true;
	}
	else{
		return false;
	}
}
?>
<body>
<form method="post" action="">

年：<input type="text" name="nian" value="<?php echo $nian?>"> 月：<input type="text" name="yue" value="<?php echo $yue;?>"><input type="submit" value="输出">：<input type="text" name="tian" value="<?php echo $tian;?>">

</form>

</body>


</html>
第三种方法： 

<html>
<head>
<title>给出一个年份和月份输出该月的天数</title>
</head>
<?php 
$nian=$yue=$tian='';

if($_POST){
	$nian=$_POST['nian'];
	$yue=$_POST['yue'];
	if($yue<1 || $yue>12){
		$tian='月份输入有误';
	}elseif($yue==4 || $yue==6 || $yue==9 || $yue==11){
		$tian=30;
	}elseif($yue==2){
		if(isRunnian($nian)){
			$tian=29;
		}else{
			$tian=28;
		}
	}else{
		$tian=31;
	}
}

function isRunnian($y){
	if($y % 4 == 0 && $y % 100 != 0  || $y % 400 == 0){
		return true;
	}
	else{
		return false;
	}
}
?>
<body>
<form method="post" action="">

年：<input type="text" name="nian" value="<?php echo $nian?>"> 月：<input type="text" name="yue" value="<?php echo $yue;?>"><input type="submit" value="输出">：<input type="text" name="tian" value="<?php echo $tian;?>">

</form>

</body>


</html>



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