How to disable repeated page refresh in PHP

In PHP, how can I prevent repeated page refresh? thank you. in PHP, how does one disable repeated page refresh. if you cannot press F5 or refresh again, you can use either of the following methods: 1. Use JAVASCRIPT to Judge 2. The session is limited to 3. How to disable repeated page refresh in hidden & nbsp; 4.h PHP
Thank you for helping me.
In PHP, how does one disable repeated page refresh? if you cannot refresh the page repeatedly, press F5 or refresh

------ Solution --------------------
There are four methods: 1. Use JAVASCRIPT for judgment
2. Session limitation
3. Hidden
4. the header () is redirected immediately. I think the header ("Location: http: // ^") is the best. when the data is processed, it is immediately redirected to the page,
It will not change even if it is refreshed;