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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PHP 4, PHP 5, PHP 7)
checkdate — 验证一个格里高里日期
$month
, int $day
, int $year
)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。
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。
如果给出的日期有效则返回 TRUE
,否则返回
FALSE
。
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)
[#1] SDSurfer [2014-10-16 16:07:52]
Super graceful solution by glavic and the mod by Bas - the only thing I would add is if you have user input, you have the potential for really munged up values for date which can throw exceptions. Add a try/catch:
if (((int) $version[0] >= 5 && (int) $version[1] >= 2 && (int) $version[2] > 17)) {
try { $d = DateTime::createFromFormat($format, $date); }
catch (Exception $e) {
if ($debug) { echo "Invalid date: " . $e->getMessage() . "<br>\n"; }
return false;
}
} else {
try { $d = new DateTime(date($format, strtotime($date))); }
catch (Exception $e) {
if ($debug) { echo "Invalid date: " . $e->getMessage() . "<br>\n"; }
return false;
}
}
[#2] Bas [2014-02-20 11:59:43]
And here is a version which will work for PHP 5.2 also.
function ValidateDate($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) == $date;
}
[#3] jdiosdado [2013-12-04 21:54:01]
There is an issue with glavic at gmail dot com answer:
var_dump(validateDate('9/21/1943', ''m/d/Y''));
The result will be false. 09/21/1943 =! 9/21/1943
[#4] glavic at gmail dot com [2013-09-12 12:46:32]
With DateTime you can make the shortest date&time validator for all formats.
<?php
function validateDate($date, $format = 'Y-m-d H:i:s')
{
$d = DateTime::createFromFormat($format, $date);
return $d && $d->format($format) == $date;
}
var_dump(validateDate('2012-02-28 12:12:12')); # true
var_dump(validateDate('2012-02-30 12:12:12')); # false
var_dump(validateDate('2012-02-28', 'Y-m-d')); # true
var_dump(validateDate('28/02/2012', 'd/m/Y')); # true
var_dump(validateDate('30/02/2012', 'd/m/Y')); # false
var_dump(validateDate('14:50', 'H:i')); # true
var_dump(validateDate('14:77', 'H:i')); # false
var_dump(validateDate(14, 'H')); # true
var_dump(validateDate('14', 'H')); # true
var_dump(validateDate('2012-02-28T12:12:12+02:00', 'Y-m-d\TH:i:sP')); # true
# or
var_dump(validateDate('2012-02-28T12:12:12+02:00', DateTime::ATOM)); # true
var_dump(validateDate('Tue, 28 Feb 2012 12:12:12 +0200', 'D, d M Y H:i:s O')); # true
# or
var_dump(validateDate('Tue, 28 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true
var_dump(validateDate('Tue, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false
# ...
[#5] admin at limitsizbilgi dot com [2013-07-16 14:40:00]
function DDC($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.'.'.$dd;
}
echo DDC('2013.02.31');
//2013.02.28
[#6] mohammed dot aas2012 at gmail dot com [2012-11-07 11:23:21]
format should be in array like: array("m","d","y")
<?php
function isValidDate($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 $valid;
}
?>
[#7] bharath.kishore.a AT gmail. DOT com [2012-03-07 14:00:13]
Here is another crooked way to check if given data is valid DATETIME or not.
function checkDateTime($data) {
if (date('Y-m-d H:i:s', strtotime($data)) == $data) {
return true;
} else {
return false;
}
}
[#8] rfeugenio at gmail dot com [2009-03-26 22:21:19]
<?php
// This is a simple function that will get the last day of the month.
function GetLastDayofMonth($year, $month) {
for ($day=31; $day>=28; $day--) {
if (checkdate($month, $day, $year)) {
return $day;
}
}
}
?>
[#9] James Luckhurst [2009-03-22 16:26:44]
<?php
function convertdate($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','-');
?>
[#10] ystein M [2009-03-18 05:51:56]
I think there is an error in the function from bmauser below. $regexp is overwritten. Here's another version which also accepts missing zeros and two digits year notation.
This function checks date if matches given format and validity of the date.
<?php
function is_valid_date($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.]
[#11] sebagr@gmail [2009-03-04 09:20:29]
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');
?>
[#12] venadder at yahoo dot ca [2009-01-21 22:49:12]
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, $Year );
}
?>
[#13] a34 at yahoo dot com [2007-07-09 05:21:57]
checkData function posted below does not consider a date entered such as 03/27c/2000. The c will cause it to crash. Here is the fix.
<?php
function checkData($mydate) {
list($yy,$mm,$dd)=explode("-",$mydate);
if (is_numeric($yy) && is_numeric($mm) && is_numeric($dd))
{
return checkdate($mm,$dd,$yy);
}
return false;
}
?>