How can the automatic redirection after 3 seconds in a PHP script be improved to prevent re-execution of the login script?

The issue can be solved by adding a session variable to track if the redirection has already occurred. By checking this variable before executing the redirection, we can prevent the login script from being re-executed. 

<?php
session_start();

if(!isset($_SESSION['redirected'])){
    $_SESSION['redirected'] = true;
    header("refresh:3;url=dashboard.php");
    exit();
}
?>

Keywords

header refresh session redirect login script

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