How can the issue of users having to log in twice be resolved in a PHP login script?

Issue: The problem of users having to log in twice can be resolved by ensuring that the session_start() function is called at the beginning of each page where the user needs to be authenticated. This will ensure that the session variables are properly initialized and maintained throughout the user's browsing session. 

<?php
session_start();

// Check if user is already logged in
if(isset($_SESSION['user_id'])) {
    // User is already authenticated, redirect to the home page
    header("Location: home.php");
    exit();
}

// Rest of your login script goes here
?>

Keywords

PHP login script session management cookies authentication.

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