PHP function to check valid date

Nov 9, 2011

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I have written a PHP function to check a supplied string is a valid date or not. Lets have a look into the code.

/**
 * The function is_date() validates the date and returns true or false
 * @param $str sting expected valid date format
 * @return bool returns true if the supplied parameter is a valid date 
 * otherwise false
 */
function is_date( $str ) {
    try {
        $dt = new DateTime( trim($str) );
    }
    catch( Exception $e ) {
        return false;
    }
    $month = $dt->format('m');
    $day = $dt->format('d');
    $year = $dt->format('Y');
    if( checkdate($month, $day, $year) ) {
        return true;
    }
    else {
        return false;
    }
}

Let’s use and improve the function.

Date function PHP

Comments

8 responses to “PHP function to check valid date”

Cx Rana

December 18, 2011

great vhaiya
mithu

April 14, 2012

Thank you bro. I have interest in php and my sql. would you help me to learn the course?
EDDM Postcard Printing

June 26, 2012

This is great Solution for date validation. Was looking something simple like this. Thanks a ton

Ravi
felipe

October 23, 2012

Thanks, this works!
Mahendra

September 10, 2014

Above Function not Worked Perfectly….
Try urself

is_date(“2014-02-31”);—- showing correct date while its wrong date
is_date(“14-03-29”);————- “”

Improve and Post Correct Function with all the functionality like to check whether year,month,date and leapyear or not ….
Thanks
Mahendra
Peter VARGA

October 8, 2014

Hi,

I am sorry but the script does not work properly. For example: 2014-02-30 is validated as a correct date.
I wrote this function [I admit it is adapted for my purposes but can be adapted easy]:

function isValidDate($sDateTime) { $aFormat = array("Y-m-d" , "Y-m-d H:i:s"); $bError = FALSE; for ( $i = 0 ; $i < count($aFormat) ; $i++ ) { $d = DateTime::createFromFormat($aFormat [$i], $sDateTime); $aResult = DateTime::getLastErrors(); if ( $aResult ["warning_count"] ) { # there is definitely something wrong if ( isset($aResult ["warnings"][10]) OR isset($aResult ["warnings"][19]) ) { # for example: 2014-02-30 or 2014-05-32 or 15:56:70 $bError = TRUE; break; } } switch ( $aResult ["error_count"] ) { case 0: # no error - all seems OK break 2; case 1: # we check if "data missing" if ( !isset($aResult ["errors"][10]) ) { # no - something else $bError = TRUE; break 2; } # continue with the next format break; } } if ( $bError ) { return ""; } return date($aFormat [$i], strtotime($sDateTime)); }
Peter VARGA

November 11, 2015

Unfortunately this solution does not work at all. All these dates return TRUE even it is not a valid date:
2015-02-29
2015-04-31
2015-06-31 and so on.
The problem is the DateTime constructor accepts these wrong dates and returns the next valid day.
tony

May 5, 2016

Isn’t it enough to do:

function is_date( $str ) {
try {
$dt = new DateTime( trim($str) );
return true;
}
catch( Exception $e ) {
return false;
}
}

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PHP function to check valid date

Comments

8 responses to “PHP function to check valid date”

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