checkdate

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

checkdate — 验证一个格里高里日期

说明

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

检查由参数构成的日期的合法性。如果每个参数都正确定义了则会被认为是有效的。

参数

month: month 的值是从 1 到 12。
day: Day 的值在给定的 month 所应该具有的天数范围之内，闰年已经考虑进去了。
year: year 的值是从 1 到 32767。

返回值

如果给出的日期有效则返回 true，否则返回 false。

范例

Example #1 checkdate() 例子


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

以上例程会输出：

bool(true)
bool(false)

参见

mktime() - 取得一个日期的 Unix 时间戳
strtotime() - 将任何字符串的日期时间描述解析为 Unix 时间戳

User Contributed Notes

hugo dot REMOVE dot voerman at priva dot NOTNEEDED dot com 05-Oct-2021 02:03


I use a slight variation of the validateDate() above, to also allow validating dates like: '2021-10-05T13:55:01Z' with DateTime::ATOM like:



<?php

function validateDate($date, $format = 'Y-m-d H:i:s')

{

    // replace a 'Z' at the end by '+00:00'

    $date = preg_replace('/(.*)Z$/', '${1}+00:00', $date);



    $d = DateTime::createFromFormat($format, $date);

    return $d && $d->format($format) == $date;

}

?>



This means a call like:

<?php

var_dump(validateDate('2021-10-05T13:55:01Z', DateTime::ATOM));

?>

will output true



I use this in a filter_input wrapper like:



<?php

function fi_validateDate($format)

{

    return function($value = null) use ($format) {

        return validateDate($value, $format) ? $value : null;

    };

}?>



so I can do stuff like:



<?php

$dateFrom = filter_input(INPUT_GET, 'dateFrom', FILTER_CALLBACK, ['options' => fi_validateDate(DateTime::ATOM)]);

?>

Anonymous 15-Feb-2021 06:10


based on : 

https://www.php.net/manual/es/function.checkdate.php#113205



there is a HOF php8 refactor 



        $isValidFormatDateHOF = fn (string $format) =>  static fn (string $date) => ($dateTimeInmutable = \DateTimeImmutable::createFromFormat( $format, $date)) && $dateTimeInmutable->format( $format) === $date;



$isAtom = $isvalidFormatDateHOF(DateTimeInterface::ATOM)



$isAtom('2020-02-02')  //false

$isAtom('2021-02-15T19:17:01+00:00') //true

MarkAgius at markagius dot co dot uk 08-Mar-2020 02:25


Note:

checkdate() will return true and not false with the non existing dates 3/09/1752 to 13/09/1752

glavic at gmail dot com 12-Sep-2013 12:46


With DateTime you can make the shortest date&time validator for all formats.



<?php



function validateDate($date, $format = 'Y-m-d H:i:s')

{

    $d = DateTime::createFromFormat($format, $date);

    return $d && $d->format($format) == $date;

}



var_dump(validateDate('2012-02-28 12:12:12')); # true

var_dump(validateDate('2012-02-30 12:12:12')); # false

var_dump(validateDate('2012-02-28', 'Y-m-d')); # true

var_dump(validateDate('28/02/2012', 'd/m/Y')); # true

var_dump(validateDate('30/02/2012', 'd/m/Y')); # false

var_dump(validateDate('14:50', 'H:i')); # true

var_dump(validateDate('14:77', 'H:i')); # false

var_dump(validateDate(14, 'H')); # true

var_dump(validateDate('14', 'H')); # true



var_dump(validateDate('2012-02-28T12:12:12+02:00', 'Y-m-d\TH:i:sP')); # true

# or

var_dump(validateDate('2012-02-28T12:12:12+02:00', DateTime::ATOM)); # true



var_dump(validateDate('Tue, 28 Feb 2012 12:12:12 +0200', 'D, d M Y H:i:s O')); # true

# or

var_dump(validateDate('Tue, 28 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true

var_dump(validateDate('Tue, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false

# ...