How to ADD Date Format Validation in PHP

How to ADD Date Format Validation in PHP

Using Regex

function validateDate($data) {
if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]

|[1-2][0-9]|3[0-1])$/",$date))
    {
        return true;
    }else{
        return false;
    }
}
 
var_dump(validateDate("2017-02-27")) // true
var_dump(validateDate("27-02-2017")) // false
var_dump(validateDate("2017-14-27")) // false

Using PHP Date object

 function validateDate($date)
{
    $dt = DateTime::createFromFormat('Y-m-d', $date);
    return $dt && $dt->format('Y-m-d') === $date;
}
var_dump(validateDate("2017-02-27")) // true
var_dump(validateDate("27-02-2017")) // false
var_dump(validateDate("2017-14-27")) // false