PHP/Date/checkdate

checkdate.php

 
<?php
echo checkdate(4, 31, 2005);
echo checkdate(03, 29, 2004);
echo checkdate(03, 29, 2005);
?>

Creating a timestamp from the components of a date

 
<?php
echo("Validating: 5/31/2005<br />");
if (checkdate(5,31,2005)) {
    echo("Date accepted: ");
    $new_date=mktime(18,05,35,5,31,2005);
    echo date("r",$new_date);
}
else {
    echo ("Invalid date.");
}
?>