How can a PHP developer troubleshoot a "Session ID not found" error?

When a PHP developer encounters a "Session ID not found" error, it typically means that the session ID being used does not exist or has expired. To troubleshoot this issue, the developer can regenerate the session ID and update the session cookie with the new ID. 

session_start();

if (!isset($_SESSION['logged_in'])) {
    session_regenerate_id(); // Regenerate session ID
    $_SESSION['logged_in'] = true;
}

// Rest of the code handling the session

Keywords

PHP Session ID Troubleshoot Error Debugging

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