different date format validations ??

[PHPycho]

hello forums!!
can anybody give idea on different types of date format validation function like Y-m-d , dmY etc.
example:

function validateDate($input_date, $format){
	//necessary processings....
	return bool;
}
validateDate('2008-08-135', 'Y-m-d');

Thanks in advance for the valueable suggestions

[bradgrafelman]

If your server is a) not Windows, and b) competent enough to be hosting PHP5 >= 5.1.0, it could be as simple as:

function validateDate($input_date, $format){
    return (bool)strptime($input_date, $format);
}

Note that the format requires % characters as per the format understood by the [man]strftime/man function.