<html><head><meta charset="utf8"></head><body><table border="1" align="center" width="450" height="101" cellpadding="1" cellspacing="1" bgcolor="#ccff00"><tr><td height="25" align="center" colspan="2">判斷指定的年份是否為閏年</td></tr><tr bgcolor="#ffff99"><td width="200" height="30" >請輸入一個四位數的年份：</td><td ><form action="" method="post"><input type="text" name="year"><input type="submit" name="submit" value="計算"></td></tr><tr><td colspan="2" align="center"><?phpif(isset($_POST['submit'])){if($_POST['year']=="") echo "請輸入年份后再提交!";else{$year=$_POST['year'];$result=($year%4==0&&$year%100!=0)||($year%400==0)?$year."是閏年":$year."不是閏年";echo $result;} }?></td></tr></table></body></html>
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