How can I compare two dates in PHP?

Question

How can I compare two dates in PHP?

The date is stored in the database in the following format

2011-10-2

If I wanted to

Answer 1

$today = date('Y-m-d');//Y-m-d H:i:s
$expireDate = new DateTime($row->expireDate);// From db 
$date1=date_create($today);
$date2=date_create($expireDate->format('Y-m-d'));
$diff=date_diff($date1,$date2);

//echo $timeDiff;
if($diff->days >= 30){
    echo "Expired.";
}else{
    echo "Not expired.";
}