闰年平年判断

闰年平年判断1
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<?php

header("Content-Type: text/html;charset=utf-8"); //语言强制

$yeaar = 2023;
//$yeaar = 2020;

$expression = ($yeaar % 4 == 0 && $yeaar %100 != 0)|| ($yeaar % 400 == 0) ? "闰年": "平年";

echo $yeaar ."年是".$expression;

?>
闰年平年判断2
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Year</title>
</head>
<body>
<form action="" method="post">
请输入年份：<input type="text" value="" name="year">
<input type="submit" value="计算结果"><br />   <!--按钮-->
</form>
</body>
</html>
<?php
if(isset($_POST['year']) )
{
    $year = $_POST['year'];    //年份
    echo "<br>";
    if( is_numeric($year))
    {
 
 
        if( $year % 4 == 0 && $year % 100 != 0  || $year % 400 == 0) //能否被整除
          {
              echo $year."是闰年";   //输出闰年
            }
             else
                 {
                    echo $year."不是闰年";
                }
            }
        else   //输入其他
    {
        echo "你没有正确输入年份！";
    }
 
 }
 ?>

座位号输出

座位号输出
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<?php

header("Content-Type: text/html;charset=utf-8"); //语言强制

$maxline = 4;

$no = 17;

$line = ceil($no/$maxline);

$row = $no%$maxline?$no%$maxline:$maxline;

echo "编号<b>".$no."</b>的座位在第<b>".$line."</b>排第<b>".$row."</b>个位置";

?>