Untitled

<!DOCTYPE html>
<html>
<head>
    <title>demo form</title>
    <link rel="stylesheet" href="css/style.css">
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

    <!-- Optional theme -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">

    <!-- Latest compiled and minified JavaScript -->
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>


</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-md-6">
            <form class="form-horizontal" name="formsubmit" method="post">
              <div class="form-group">
                <label class="col-sm-2 control-label">User</label>
                <div class="col-sm-10">
                  <input type="text" class="form-control" id="inputuser" placeholder="User" name="user">
                </div>
              </div>

              <div class="form-group">
                <label for="inputPassword" class="col-sm-2 control-label">Password</label>
                <div class="col-sm-10">
                  <input type="password" class="form-control" id="inputPassword" placeholder="Password" name="pass">
                </div>
              </div>
              <button type="submit" name="submit" class="btn btn-default">Submit</button>
            </form>
            </div>
        </div>
    </div>


</body>
</html>
<?php
     if (isset($_POST['submit'])) {
        $admin = $_POST['user'];
        $password = $_POST['pass'];

        if ($admin == 'admin' && $password == '123456') {
            echo 'Chúc mừng bạn đăng nhập thành công';
        }
        else {
            echo "Nhập lại đi, sai rồi. hehe";
        }
     }


/*
    - Nhâp user, pass.
    - xử lý:     + Nếu user : admin và pass: 123456.
                + nếu khác
    - xuất        ......

*/


?>