例1，根据指定的日期生成时间戳，checkdate检测日期
复制代码 代码示例:
<?php
echo("Validating: 5/31/2013<br />");
if (checkdate(5,31,2007)) {
echo('Date accepted: ');
$new_date=mktime(18,05,35,5,31,2013);
echo date("r",$new_date);
}
else {
echo ('Invalid date.');
}
//by www.jb200.com
?>
2，checkdate()日期检测
复制代码 代码示例:
<?php
echo checkdate(4, 31, 2005);
echo checkdate(03, 29, 2004);
echo checkdate(03, 29, 2005);
?>
