sa

<?php
session_start();
?>
<!DOCTYPE HTML>
 <?php
        $username = "username";
        $password = "password";


        if (isset($_SESSION['loggedIn']) && $_SESSION['loggedIn'] == true) {
            header("location: tableManage.php");
        }
        if (isset($_POST['username']) && isset($_POST['password'])) {
            if ($_POST['username'] == $username && $_POST['password'] == $password) {

            }
            $_SESSION['loggedIn'] == true;
                header("location: tableManage.php");
        }
        ?>


<html>

    <head>


    </head>

    <body>


        <form method="post"  action="tableManage.php">
            <p>Username:</p>
            <input type="text" name="username"><br>
            <p>Password:</p>
            <input type="password" name="password"><br>
            <input type="submit" value="Login">
        </form>
    </body>


</html>