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<?php

        session_start();
        include('db.php');

?>

<!DOCTYPE html>

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1" />
    <link rel="stylesheet" type="text/css" href="style.css"/>

</head>

<body>


<?php

    if(isset($_POST['login']) && $_POST['login'] == 'Login') {
        $loginEmail = $_POST['loginEmail'];
        $loginPassword = $_POST['loginPassword'];

        $query = $db->prepare("INSERT INTO dbname(password,email) VALUES ('?','?');");
        $query->bind_param("ss",$loginEmail,$loginPassword);
        $query->execute();

    }
    ?>

        <div id="login">
            <strong>Login</strong>

            <br/><br/>

            <form action = "<?php echo $_SERVER['PHP_SELF'];?>" method="POST">
                <table style="width:500px">
                    <tr>
                        <td><input type="text" name="loginEmail" placeholder = "Email" required/><br/></td>
                    </tr>
                    <tr>
                        <td><input type="password"  name="loginPassword" placeholder = "Password" required/><br/></td>

                    </tr>
                </table>

                <input style="font-weight: bold; width: 70px; height: 25px; border-radius: 5px;" type="submit" name="login" value="Login"/>
            </form>
        </div>
</body>
</html>

<?php

        $host = 'host';
        $user = 'user';
        $password = 'password';
        $database = 'dbname';

        $db = new mysqli($host, $user, $password, $database);

        if($db->connect_errno > 0){
            die('Unable to connect to database ['.$db->connect_errno.']');
        }
?>

$db->prepare("INSERT INTO users(password,email) VALUES (?, ?);");

$db->prepare("INSERT INTO users(password,email) VALUES ('?','?');");