db.php

<?php
// Only modify session settings if the session isn't started yet
if (session_status() === PHP_SESSION_NONE) {
    $lifetime = 30 * 24 * 60 * 60; // 30 days
    ini_set('session.gc_maxlifetime', $lifetime);
    
    session_set_cookie_params([
        'lifetime' => $lifetime,
        'path' => '/',
        'secure' => false,   // true if using HTTPS
        'httponly' => true,
        'samesite' => 'Lax'
    ]);

    session_start();
}
// Database connection
$host = "localhost";
$user = "root";        // change if needed
$pass = "";            // set your MySQL root password here
$db   = "lab_automation";
$conn = mysqli_connect($host, $user, $pass, $db);

// Check connection
if (!$conn) {
    die("Database connection failed: " . mysqli_connect_error());
}
?>