php检查日期函数checkdate用法实例

integer checkdate (int %month, int $day, int $year);

<?php
echo "2/29/1900";
checkdate (2, 29, 1900)?print " is valid":print " is not valid";
echo "n";
echo "2/29/2000";
checkdate (2, 29, 2000)?print " is valid":print " is not valid";
echo "n";
echo "2/29/2100";
checkdate (2, 29, 2100)?print " is valid":print " is not valid";
echo "n";
echo "4/30/2008";
checkdate (4, 30, 2008)?print " is valid":print " is not valid";
echo "n";
echo "4/31/2008";
checkdate (4, 31, 2008)?print " is valid":print " is not valid";
echo "n";
?>

2/29/1900 is not valid
2/29/2000 is valid
2/29/2100 is not valid
4/30/2008 is valid
4/31/2008 is not valid