/**
 * PHP中可以使用checkdate函数校验日期的正确性。
 *
 * @param 
 * @arrange 512-笔记网： jb51.cc
 **/
integer checkdate (int %Month,int $Day,int $Year);
/***   来自编程之家 jb51.cc（jb51.cc）   ***/

/**
 * PHP中可以使用checkdate函数校验日期的正确性。
 *
 * @param 
 * @arrange 512-笔记网： jb51.cc
 **/
<?PHP
echo "2/29/1900";
checkdate (2,29,1900)?print " is Valid":print " is not valid";
echo "\n";
echo "2/29/2000";
checkdate (2,2000)?print " is Valid":print " is not valid";
echo "\n";
echo "2/29/2100";
checkdate (2,2100)?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";
?>
/***   来自编程之家 jb51.cc（jb51.cc）   ***/

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