[Roel]

you should use timestamp for this.
instead of saving the data, save the timestamp

Код:

expiretimestamp = gettime() + TOTAL DAYS HE WILL BE VIP * 24 * 60 * 60;
// remove the TOTAL DAYS HE WILL BE VIP to the days he will be vip.
// save expiretimestamp into the dini as 'vipdate'

Код:

// For exampe at every login you use this:
if(dini_Int(path,"vipdate") < gettime())
{
  // expired
}