[SOLVED] validate date against date format

[zohab]

Hi ,

 

I have following dates and date format.

 

 

 'Y-m-d' => '2009-07-16',
    'm-d-Y' => '07-16-2009',
    'd-m-Y' => '16-07-2009',
    'Y/m/d' => '2009/07/16',
    'm/d/Y' => '07/16/2009',
    'd/m/Y' => '16/07/2009',
    'Y.m.d' => '2009.07.16',
    'd.m.Y' => '16.07.2009',
    'm.d.Y' => '07.16.2009',

 

I have following function which checks date against date format.

 

function is_date($value, $format){

if(strlen($value) == 10 && strlen($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][0-9]', $value);
		$regexp = str_replace('dd', '[0-3][0-9]', $value);
		$regexp = str_replace('yyyy', '[0-9]{4}', $value);
		$regexp = str_replace($separator, "\\" . $separator, $value);

		if($regexp != $value && preg_match('/'.$regexp.'/', $value)){
			// check date
			$day = substr($value,strpos($format, 'd'),2);
			$month = substr($value,strpos($format, 'm'),2);
			$year = substr($value,strpos($format, 'y'),4);

			if(@checkdate($month, $day, $year))
			return true;
		}
	}
}
return false;
}

 

 

When i am using it as follow ,it is not giving result.

 

 

if(!is_date("dd/mm/yy","2009-07-16"){
echo"errorxyz";
}
if(!is_date("dd/mm/yy","07-16-2009"){
echo"errorxyz";
}
if(!is_date("dd/mm/yy","2009.07.16"){
echo"errorxyz";
}
if(!is_date("dd/mm/yy","16/07/2009"){
echo"errorxyz";
}

 

 

 

any idea?

 

PHP:5.2.6

MYSQL:5.0.51b

 

 

[ignace]

'Y-m-d' => '2009-07-16'

 

should be:

 

'Y-m-d' => '/[0-9]{4}-[0-9]{2}-[0-9]{2}/'

 

Do this for all supported formats.

 

function is_date($format, $date) {
    global $date_formats;
    if (!array_key_exists($format, $date_formats)) return false; // not a valid format
    return preg_match($date_formats[$format], $date);
}

[zohab]

hi

 

I need regular expression for other array keys than yyyy-mm-dd

 

function is_date($date,$format) {
    $date_formats=array (
    'yyyy-mm-dd' => '/[0-9]{4}-[0-9]{2}-[0-9]{2}/',
    'mm-dd-yyyy' => '?',
    'dd-mm-yyyy' => '?',
    'yyyy/mm/dd' => '?',
    'mm/dd/yyyy' => '?',
    'dd/mm/yyyy' => '?',
    'yyyy.mm.dd' => '?',
    'dd.mm.yyyy' => '?',
    'mm.dd.yyyy' => '?',
  );
  
    if (!array_key_exists($format, $date_formats)) return false; // not a valid format
    return preg_match($date_formats[$format], $date);
}

 

aby idea?

[zohab]

thanks

 

Problem is solved