how execute an script from server every 30 seconds - apache [duplicate]

Question

how can I execute a php script from server every 30 seconds?

I have a php script and I need to execute it every 30 seconds to retrieve some information from other sites by curl.

but I dont know to run a php page in background by apache every 30 seconds.

Answer 1

Use Cron job script. Get a 30 seconds interval , you could delay by 30 seconds:

-*/5-22 * * * sleep 30;your_script.php

The above script will run 5am to 10 pm