I want to a e-cards or something like that. The user can choose the e-cards, after chosen, he must enter the some fields like name(to and from), email(to and from), message and
This is somehow complex. First it depends on your system. If it is Linux/BSD/Unix/Solaris then you have this handy utility as cron. If you are using Windows, you have Scheduled Tasks. Run your script daily (or as you wish) and check what cards you have to send today.