PHP DateTime credit card expiration

Question

I'm trying to use DateTime to check if a credit card expiry date has expired but I'm a bit lost.

I only want to compare the mm/yy date.

Here is my code so far

$expmonth = $_POST['expMonth']; //e.g 08
$expyear = $_POST['expYear']; //e.g 15

$rawExpiry = $expmonth . $expyear;

$expiryDateTime = \DateTime::createFromFormat('my', $rawExpiry);
$expiryDate = $expiryDateTime->format('m y');

$currentDateTime = new \DateTime();
$currentDate = $currentDateTime->format('m y');

if ($expiryDate < $currentDate) {
    echo 'Expired';
} else {
    echo 'Valid';
}

I feel i'm almost there but the if statement is producing incorrect results. Any help would be appreciated.

Answer 1

It's simpler than you think. The format of the datess you are working with is not important as PHP does the comparison internally.

$expires = \DateTime::createFromFormat('my', $_POST['expMonth'].$_POST['expYear']);
$now     = new \DateTime();

if ($expires < $now) {
    // expired
}