[Regex] Validare 01 02 03 e 2000 2001 .......

[whisher]

A chi può servire :

$day = (int)'29'; 
$month = (int)'02';
$year= (int)'2000';
//true
$day = (int)'29'; 
$month = (int)'02';
$year= (int)'2001';
//false
$day = (int)'28'; 
$month = (int)'02';
$year= (int)'2007';
//true
$day = (int)'31'; 
$month = (int)'11';
$year= (int)'2007';
//false
$isValidDayMonth= true;
$arrayLookup = array('1'=>'31',
                    '3'=>'31',
                    '4'=>'30',
                    '5'=>'31',
                    '6'=>'30',
                    '7'=>'31',
                    '8'=>'31',
                    '9'=>'30',
                    '10'=>'31',
                    '11'=>'30',
                    '12'=>'31');
if($day !== 0 && $month !== 0 && $year !== 0 ){
    if(isset($arrayLookup[$month]) && $day <= 31){
         //check if month value and day value agree
        if($day >= $arrayLookup[$month]){
            //bad day for the month
            $isValidDayMonth= false;
        }
    }
    //check february day 
    if ($month === 2){ 
        if($day > 29){
            //bad day for the month
            $isValidDayMonth= false;  
        }
        elseif($day === 29){
            if (($year % 4 == 0) && ($year % 100 != 0) || ($year % 400 == 0)) {
              // year div by 4 and ((not div by 100) or div by 400) ->ok
                 $isValidDayMonth= true;  
             }  
            else{
                $isValidDayMonth= false;
            }
        }
    }
}
var_dump($isValidDayMonth); 

Ogni suggerimento è il benvenuto