project 0 - insert value (html+php)

<!DOCTYPE html>
<html lang="en">

<head>
    <title>MY World</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!--
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
    -->


    <link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap.css">
    <link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap.min.css">
    <link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap-theme.css">
    <link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap-theme.min.css">

    <link rel="stylesheet" type="text/css" href="ok.css">

    <!--
    <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
    <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    -->

</head>

<body>
<!--
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
-->
<script src="bootstrap/js/jquery.min.js"></script>
<script src="bootstrap/js/bootstrap.min.js"></script>


<!--
<link rel="javascript" src="bootstrap/js/bootstrap.js>
<link rel=" javascript " src="bootstrap/js/bootstrap.min.js ">
<link rel="javascript " src="bootstrap/js/jquery.js>
<link rel="javascript" src="bootstrap/js/jquery.min.js">
-->

<div class="container">
    <h1 align="center">Welcome to our site</h1>
    <p align="center">Please Login or Sign up to continue </p>
</div>

<form>
    <!-- action="action_page.php" -->
    <div class="container">
        <label><b>Username</b>
        </label>
        <input type="text" placeholder="Enter Username" name="uname" required>

        <label><b>Password</b>
        </label>
        <input type="password" placeholder="Enter Password" name="psw" required>

        <!--  <button type="submit">Login</button> -->
        <button type="submit">Sign up</button>
    </div>
</form>

<div class="container">
    <?php $db_connection=new mysqli( "localhost", "root", "", "ok");
    if($db_connection->connect_error)
    {
        die("Error connecting to MySQL server.".$db_connection->connect_error);
    }
    if(isset($_GET["uname"])&&isset($_GET["psw"]))
    {
        $getUname=$_GET["uname"];
        $getPass=$_GET["psw"];
        /* $query = (" INSERT INTO user0(Dname, Dpassword)
                       VALUES (
                                "."
                                '".$getUname."',
                                '".$getPass."'
                              ) "
                    ); */
        $query =
            (" INSERT INTO user0(Dname, Dpassword)
               VALUES (
                       "."
                       '".$getUname."',
                       '".SHA1($getPass)."'
                       )"
            );

        if($db_connection->query($query)==TRUE)
        {
            echo "Successfully inserted";
        }
        else
        {
            echo "Error : ".$query."<br>".$db_connection->error;
        }
    }
    ?>
</div>
</body>

</html>