How do i run a php script every second?

Question

I am currently writing a online game. Now I have to check if an event happen (checking timestamp in database) and depending on that execute some actions. I have to check for

Answer 1

You should probably run the script once, and use a loop with delay to accomplish your desired timing. The side benefit is that this is more efficient, and you would only have to open resources (ie, databases) once.