$diff = abs(time() - $time);
$years = floor($diff / (365*60*60*24));
$months = floor(($diff - $years * 365*60*60*24)
/ (30*60*60*24));
$days = floor(($diff - $years * 365*60*60*24 -
$months*30*60*60*24)/ (60*60*24));
$hours = floor(($diff - $years * 365*60*60*24
- $months*30*60*60*24 - $days*60*60*24)
/ (60*60));
$minutes = floor(($diff - $years * 365*60*60*24
- $months*30*60*60*24 - $days*60*60*24
- $hours*60*60)/ 60);
if ($minutes > 15 ) {
$success = true;
}