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PHP checkdate() Function

Complete PHP Date Reference

Definition and Usage

The checkdate() function returns true if the specified date is valid, and false otherwise.

A date is valid if:

month is between 1 and 12 inclusive
day is within the allowed number of days for the particular month
year is between 1 and 32767 inclusive

Syntax

checkdate(month,day,year)

Parameter	Description
month	Required. Specifies the month
day	Required. Specifies the day
year	Required. Specifies the year

Example

<?php
var_dump(checkdate(12,31,2000));
var_dump(checkdate(2,29,2003));
var_dump(checkdate(2,29,2004));
?>

The output of the code above will be:

bool(true)
bool(false)
bool(true)