How can PHP sessions be effectively used to maintain user login information across multiple pages?

To maintain user login information across multiple pages using PHP sessions, you can store the user's login credentials in session variables upon successful login and check these session variables on each page to verify the user's login status. 

// Start the session
session_start();

// Check if user is logged in
if(isset($_SESSION['user_id'])) {
    // User is logged in, perform necessary actions
} else {
    // User is not logged in, redirect to login page
    header("Location: login.php");
    exit();
}

Keywords

PHP sessions user login maintain multiple pages information

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