Validate a Gregorian date

# checkdate

(PHP 4, PHP 5, PHP 7, PHP 8)

checkdate — Validate a Gregorian date

### Description

checkdate(int `$month`, int `$day`, int `$year`): bool

Checks the validity of the date formed by the arguments. A date is considered valid if each parameter is properly defined.

### Parameters

`month`

  The month is between 1 and 12 inclusive.

`day`

  The day is within the allowed number of days for the given `month`. Leap `year`s are taken into consideration.

`year`

  The year is between 1 and 32767 inclusive.

### Return Values

Returns `true` if the date given is valid; otherwise returns `false`.

### Examples

Example #1 checkdate() example

`<?php
var_dump(checkdate(12, 31, 2000));
var_dump(checkdate(2, 29, 2001));`

The above example will output:

    bool(true)
    bool(false)

### See Also

- mktime() - Get Unix timestamp for a date
- strtotime() - Parse about any English textual datetime description into a Unix timestamp

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