在php中使用会话自动回显文本

I am using the session to show some text. The result I want is After 10s of logging it should echo some text.

I tried:-

Functions.php

function LoginSessionExpired() {

    if(!isset($_SESSION['first_visit']))
    {
    $_SESSION['first_visit']=time();
    }else{
        $login_session_durations = 10;
        if(isset($_SESSION['loggedin_time']) and isset($_SESSION["user_id"])){  
            if(((time() - $_SESSION['first_visit']) > $login_session_durations)){ 
                return true; 
            } 
        }
    }
    }

Dashboard.php

session_start();
include("functions.php");
if(isset($_SESSION["user_id"])) {
    if(LoginSessionExpired()) {
    echo "Ok";
}
}

But it echoes only when the page is refreshed, I want the auto show without refreshing.