logout.php

<?php
session_start();

include "db_conn.php";

$username = "";

if (isset($_SESSION['userOnline'])) {
    
    $username = $_SESSION['userOnline'];

    // Get the current time in the Philippines
    date_default_timezone_set('Asia/Manila');
    $currentDateTime = date('Y-m-d H:i:s');
    $date = date('Y-m-d', strtotime($currentDateTime));
    $time = date('H:i:s', strtotime($currentDateTime));
    
    $sql = "INSERT INTO `log`(`username`, `event`, `date`, `time`) 
            VALUES ('$username','logged out', '$date', '$time')";
    $result = mysqli_query($conn, $sql);
    
    session_unset();
    session_destroy();
    
    // if (ini_get("session.use_cookies")) {
    //     $params = session_get_cookie_params();
    //     setcookie(session_name(), '', time() - 42000,
    //         $params["path"], $params["domain"],
    //         $params["secure"], $params["httponly"]
    //     );
    // }
    
    $response = ['message' => 'Session destroyed successfully'];
    echo json_encode($response);
} else {
    echo 'Try to re-login!';
}
?>