PHP checkdate() 函数

检查多个日期是否是有效的公历日期：

<?php
var_dump(checkdate(12,31,-400));
echo "<br>";
var_dump(checkdate(2,29,2003));
echo "<br>";
var_dump(checkdate(2,29,2004));
?>

定义和用法

checkdate() 函数用于验证公历日期。

checkdate( month, day, year)

Parameter	Description
month	Required. Specifies the month as a number between 1 and 12
day	Required. Specifies the day as a number between 1 and 31
year	Required. Specifies the year as a number between 1 and 32767

返回值：	如果日期有效，则为 TRUE。否则为假
PHP 版本：	4.0+