php check if format is date

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showing results for - "php check if format is date"
Gaynor
25 Jan 2021
1function validateDate($date, $format = 'Y-m-d')
2{
3    $d = DateTime::createFromFormat($format, $date);
4    // The Y ( 4 digits year ) returns TRUE for any integer with any number of digits so changing the comparison from == to === fixes the issue.
5    return $d && $d->format($format) === $date;
6}
7
8Test cases:
9var_dump(validateDate('2013-13-01'));  // false
10var_dump(validateDate('20132-13-01')); // false
11var_dump(validateDate('2013-11-32'));  // false
12var_dump(validateDate('2012-2-25'));   // false
13var_dump(validateDate('2013-12-01'));  // true
14var_dump(validateDate('1970-12-01'));  // true
15var_dump(validateDate('2012-02-29'));  // true
16var_dump(validateDate('2012', 'Y'));   // true
17var_dump(validateDate('12012', 'Y'));  // false
source
Michele
18 Nov 2018
1if (preg_match("/\d{4}\-\d{2}-\d{2}/", $date)) {
2    echo 'true';
3} else {
4    echo 'false';
5}
source
Matthias
26 Feb 2019
1function isRealDate($date) { 
2    if (false === strtotime($date)) { 
3        return false;
4    } 
5    list($year, $month, $day) = explode('-', $date); 
6    return checkdate($month, $day, $year);
7}
8
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