checkdate(2, 29, 2000)
When you get a datefor example, from the user using an HTML formthis data must be validated. This includes checking whether the month exists and if the month has enough days. If it's February, you might also want to find out whether it is a leap year.
checkdate function syntax
bool checkdate ( int $month , int $day , int $year )
This function validate a Gregorian date and accepts three parameters:
Monthbetween 1 and 12
Daywithin the allowed number of days for the given month
Yearbetween 1 and 32767
checkdatereturns TRUE if the date given is valid; otherwise returns FALSE.
Validating Date Information
<?php echo '2000 was ' . (checkdate(2, 29, 2000) ? 'a' : 'no') . ' leap year.<br />'; echo '2100 will be ' . (checkdate(2, 29, 2100) ? 'a' : 'no') . ' leap year.'; ?>
But PHP would not be PHP if you really had to do this on your own. The function
checkdate() validates a date; you provide the month, the day, and the year as parameters.