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mcal_date_valid — Returns TRUE if the date is a valid date


bool mcal_date_valid(year, month, day);
int year: The year of the date to be checked
int month: The month of the date to be checked
int day: The day of the date to be checked


TRUE if the date is valid, FALSE if it is not


mcal_date_valid() lets you check to make sure that a date actually exists in a given year, such as February 29th. This can be important as many of PHP's date functions will just wrap around if you pass them dates that are invalid: February 29th, on a year that isn't a leap year, will turn into March 1st.


PHP 3 since 3.0.13, PHP 4 since 4.0b4


Example 699. Checking if a date exists

$year = 2001;
$day = 29;

if (mcal_date_valid($year, $month, $day)) {
    echo "This date occurs in " . $year;
} else {
    echo "The date is invalid";

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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