How to send on a specific day in php?

Question

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

Answer 1

Yes, you need a script that runs every day. (Barring ridiculous maneuvers like trying to fake this by checking on Web requests.) The usual way to do this in a Unix context is called a cron job; if your hosting provider is Unix-based, you should look into what they provide for making cron jobs available to you. On Windows there's a parallel service called Scheduled Tasks.