sql - Send E-mail if date has passed using php -


i'm trying make online sign sheet system. wondering if when date of event had passed able send list of people have signed event (from mysql database)to e-mail, once? imagine have compare date start date, how stop re-sending more once?

i'm not asking written script idea of how go it.

many thanks

php cannot out-of-the-box, because cannot start periodic task executed every (or on specific point in time).

thus, have 2 options:

  • start sending using external mechanism, such cron on linux. there functionality on every platform. means instruct program or os component visit particular page every, say, 5 minutes check if there new mail send. google php cron example. google php cron windows hints on how on windows.
  • you check if there new mail send whenever visits page reason. has obvious disadvantages, doesn't require set new system.

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