checkdate

(PHP 4, PHP 5)

checkdateValide une date grégorienne

Description

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

Vérifie la validité d'une date formée par les arguments. Une date est considérée comme valide si chaque paramètre est défini correctement.

Liste de paramètres

month

Le mois doit être compris entre 1 et 12.

day

Le jour doit être un jour autorisé par le mois donné. Les années bissextiles sont prises en compte.

year

L'année est comprise entre 1 et 32767 inclus.

Valeurs de retour

Retourne TRUE si la date fournie est valide, FALSE sinon.

Exemples

Exemple #1 Exemple avec checkdate()

<?php
var_dump
(checkdate(12312000));
var_dump(checkdate(2292001));
?>

L'exemple ci-dessus va afficher :

bool(true)
bool(false)

Voir aussi

  • mktime() - Retourne le timestamp UNIX d'une date
  • strtotime() - Transforme un texte anglais en timestamp

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User Contributed Notes 12 notes

up
59
glavic at gmail dot com
7 months ago
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
# ...
up
1
ystein M
5 years ago
I think there is an error in the function from bmauser below. $regexp is overwritten. Here's another version which also accepts missing zeros and two digits year notation.

This function checks date if matches given format and validity of the date.

<?php
/**
 * Checks date if matches given format and validity of the date.
 * Examples:
 * <code>
 * is_date('22.22.2222', 'mm.dd.yyyy'); // returns false
 * is_date('11/30/2008', 'mm/dd/yyyy'); // returns true
 * is_date('30-01-2008', 'dd-mm-yyyy'); // returns true
 * is_date('2008 01 30', 'yyyy mm dd'); // returns true
 * </code>
 * @param string $value the variable being evaluated.
 * @param string $format Format of the date. Any combination of <i>mm<i>, <i>dd<i>, <i>yyyy<i>
 * with single character separator between.
 */
function is_valid_date($value, $format = 'dd.mm.yyyy'){
    if(
strlen($value) >= 6 && strlen($format) == 10){
       
       
// find separator. Remove all other characters from $format
       
$separator_only = str_replace(array('m','d','y'),'', $format);
       
$separator = $separator_only[0]; // separator is first character
       
       
if($separator && strlen($separator_only) == 2){
           
// make regex
           
$regexp = str_replace('mm', '(0?[1-9]|1[0-2])', $format);
           
$regexp = str_replace('dd', '(0?[1-9]|[1-2][0-9]|3[0-1])', $regexp);
           
$regexp = str_replace('yyyy', '(19|20)?[0-9][0-9]', $regexp);
           
$regexp = str_replace($separator, "\\" . $separator, $regexp);
            if(
$regexp != $value && preg_match('/'.$regexp.'\z/', $value)){

               
// check date
               
$arr=explode($separator,$value);
               
$day=$arr[0];
               
$month=$arr[1];
               
$year=$arr[2];
                if(@
checkdate($month, $day, $year))
                    return
true;
            }
        }
    }
    return
false;
}
?>

[NOTE BY danbrown AT php DOT net: Original function was written by (bmauser AT gmail) on 16-DEC-2008.]
up
0
Bas
1 month ago
And here is a version which will work for PHP 5.2 also.

function ValidateDate($date, $format = 'Y-m-d H:i:s') {
    $version = explode('.', phpversion());
    if (((int) $version[0] >= 5 && (int) $version[1] >= 2 && (int) $version[2] > 17)) {
        $d = DateTime::createFromFormat($format, $date);
    } else {
        $d = new DateTime(date($format, strtotime($date)));
    }
    return $d && $d->format($format) == $date;
}
up
-2
bharath.kishore.a AT gmail. DOT com
2 years ago
Here is another crooked way to check if given data is valid DATETIME or not.

function checkDateTime($data) {
    if (date('Y-m-d H:i:s', strtotime($data)) == $data) {
        return true;
    } else {
        return false;
    }
}
up
-2
sebagr@gmail
5 years ago
Here's a nice snippet to check if user input is valid:

<?php

$date_format
= 'Y-m-d';
$input = '2009-03-03';

$input = trim($input);
$time = strtotime($input);

$is_valid = date($date_format, $time) == $input;

print
"Valid? ".($is_valid ? 'yes' : 'no');

?>
up
-3
jdiosdado
4 months ago
There is an issue with glavic at gmail dot com answer:

var_dump(validateDate('9/21/1943', ''m/d/Y''));

The result will be false. 09/21/1943  =! 9/21/1943
up
-3
rfeugenio at gmail dot com
5 years ago
<?php

// This is a simple function that will get the last day of the month.

function GetLastDayofMonth($year, $month) {
    for (
$day=31; $day>=28; $day--) {
        if (
checkdate($month, $day, $year)) {
            return
$day;
        }
    }   
}

?>
up
-5
mohammed dot aas2012 at gmail dot com
1 year ago
format should be in array like: array("m","d","y")

<?php
function isValidDate($strDate,$format,$ex) {
     
$valid = false;
      if(
is_array($format) && count($format) == 3 && count(explode($ex,$strDate))==3)
      {
        
$date = array_combine($format,explode($ex,$strDate));
         if(
intval($date['m']) && intval($date['d']) && intval($date['y'])){
           
$m = $date['m']; $d = $date['d']; $y = $date['y'];
           
$valid = checkdate($m,$d,$y);
         }
      }
      return
$valid;
   }
?>
up
-4
a34 at yahoo dot com
6 years ago
checkData function posted below does not consider a date entered such as 03/27c/2000.   The c will cause it to crash.  Here is the fix.

<?php
function checkData($mydate) {
      
    list(
$yy,$mm,$dd)=explode("-",$mydate);
    if (
is_numeric($yy) && is_numeric($mm) && is_numeric($dd))
    {
        return
checkdate($mm,$dd,$yy);
    }
    return
false;           
}
?>
up
-3
venadder at yahoo dot ca
5 years ago
Here is a simple IsDate function, using purely PHP functions( A Check for $Stamp can be added to see if it's a legal Unix timestamp ):

<?php
function IsDate( $Str )
{
 
$Stamp = strtotime( $Str );
 
$Month = date( 'm', $Stamp );
 
$Day   = date( 'd', $Stamp );
 
$Year  = date( 'Y', $Stamp );

  return
checkdate( $Month, $Day, $Year );
}
?>
up
-7
James Luckhurst
5 years ago
<?php
/*
## converts a given date format to another date format returns date if the checked date given is valid; otherwise returns NULL
## $s_date the date in e.g. dd/mm/yyyy
## $s_from, $s_to date formats from to i.e. convertdate('13/04/2009','eng','iso','-'); output: 2009-04-13
## date formats available
## 'eng' = dd/mm/yyyy
## 'usa' = mm/dd/yyyy
## 'iso' = yyyy/mm/dd
## $s_return_delimiter returned delimiter e.g. '-' would return dd-mm-yyyy
*/
function convertdate($s_date,$s_from,$s_to,$s_return_delimiter) {

   
$s_return_date = '';
   
$s_from = strtolower($s_from);
   
$s_to = strtolower($s_to);
   
$s_date = str_replace(array('\'', '-', '.', ',', ' '), '/', $s_date);
   
$a_date = explode('/', $s_date);
   
    switch(
$s_from) {
        case
'eng': # dd/mm/yyyy
           
$day = $a_date[0];
           
$month = $a_date[1];
           
$year = $a_date[2];
        break;
        case
'usa'# mm/dd/yyyy
           
$month = $a_date[0];
           
$day = $a_date[1];
           
$year = $a_date[2];
        break;
        case
'iso': # yyyy/mm/dd
           
$year = $a_date[0];
           
$month = $a_date[1];
           
$day = $a_date[2];
        break;
        default:
# error message
           
user_error('function convertdate(string $s_date, string $s_from, string $s_to, string $s_return_delimiter) $s_from not a valid type of \'eng\', \'usa\' or \'iso\'');
            return
NULL;
    }

   
# substitution fixes of valid alternative human input e.g. 1/12/08
   
if (strlen($day)==1) { $day='0'.$day; } # day -trailing zero missing
   
if (strlen($month)==1) { $month='0'.$month; } # month -trailing zero missing
   
if (strlen($year)==3) { $year=substr(date('Y'),0,strlen(date('Y'))-3).$year; } # year -millennium missing
   
if (strlen($year)==2) { $year=substr(date('Y'),0,strlen(date('Y'))-2).$year; } # year -century missing
   
if (strlen($year)==1) { $year=substr(date('Y'),0,strlen(date('Y'))-1).$year; } # year -decade missing

   
switch($s_to) {
        case
'eng': # dd/mm/yyyy
           
$s_return_date = $day.$s_return_delimiter.$month.$s_return_delimiter.$year;
        break;
        case
'usa'# mm/dd/yyyy
           
$s_return_date = $month.$s_return_delimiter.$day.$s_return_delimiter.$year;
        break;
        case
"iso": # yyyy/mm/dd
           
$s_return_date = $year.$s_return_delimiter.$month.$s_return_delimiter.$day;
        break;
        default:
# error message
           
user_error('function convertdate(string $s_date, string $s_from, string $s_to, string $s_return_delimiter) $s_to not a valid type of \'eng\', \'usa\' or \'iso\'');
            return
NULL;
    }

   
# if it's an invalid calendar date e.g. 40/02/2009 or rt/we/garbage
   
if (!is_numeric($month) || !is_numeric($day) || !is_numeric($year)) {
        return
NULL;
    } elseif (!
checkdate($month, $day, $year)) {
        return
NULL;
    }

    return
$s_return_date;
}

echo
convertdate('13/04/2009','eng','iso','-');
?>
up
-7
admin at limitsizbilgi dot com
9 months ago
function DDC($dates){ // Date Day Control
    $dy = substr($dates,0,4);
    $dm = substr($dates,5,2);
    $dd = substr($dates,8,2);
    for($i=0; $i<3; $i++){
        if(!checkdate($dm,$dd,$dy)){
            $dd--;
        }else{$i=3;}
    }
    return $dy.'.'.$dm.'.'.$dd;
}
echo DDC('2013.02.31');
//2013.02.28
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