( int month, int day, int year )
Returns TRUE if the date given is valid; otherwise returns FALSE.
Checks the validity of the date formed by the arguments. A date
is considered valid if:
year is between 1 and 32767 inclusive
month is between 1 and 12 inclusive
Day is within the allowed number of
days for the given month. Leap
years are taken into consideration.
Example 1. checkdate() example
var_dump(checkdate(12, 31, 2000));
var_dump(checkdate(2, 29, 2001));
The above example will output:
See also mktime() and strtotime().