What strategies can be implemented to troubleshoot and debug PHP code related to header redirects and session handling?

Issue: When using header redirects in PHP code, it is important to ensure that there are no output sent to the browser before the header function is called. Additionally, session handling should be properly initiated before any session variables are accessed or set. Fix: To troubleshoot and debug PHP code related to header redirects and session handling, make sure to start the session at the beginning of the script and avoid any output before using the header function. Additionally, check for any errors in the code that may be causing unexpected behavior. 

<?php
// Start the session
session_start();

// Check if user is logged in
if(!isset($_SESSION['user_id'])) {
    // Redirect to login page
    header("Location: login.php");
    exit();
}

// Continue with the rest of the code
?>

Keywords

header redirects session handling debugging troubleshooting PHP code

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