PHP: Detect Page Refresh

Question

I have a page action.php on which I run an SQL query through the code, so that whenever the page is viewed the query runs like its like counting page vi

Answer 1

    //here you get the url behind the domain.
    $currentPage = $_SERVER['REQUEST_URI']; 

    //if the session current page is not set.
    if(!isset($_SESSION['currentPage'])){ 

      //set the session to the current page.
      $_SESSION['currentPage'] = $currentPage;     
    }

    //check if the session is not equal to the current page
    if($_SESSION['currentPage'] != $currentPage){

       // if it's not equal you set the session again to the current page.
       $_SESSION['currentPage'] = $currentPage;

       //set the query you want to use
    }