<form action="input.php" method="post" class="registration_form"/>
  <fieldset>
    <div class="elements">
      <label for="name">Username :</label>
      <input type="text" id="name" name="name" size="25" />
    </div>
    <div class="elements">
      <label for="e-mail">E-mail :</label>
      <input type="text" id="e-mail" name="e-mail" size="25" />
    </div>
    <div class="elements">
      <label for="Password">Password:</label>
      <input type="password" id="Password" name="Password" size="25" />
    </div>
    <div class="submit">
     <input type="hidden" name="formsubmitted" value="TRUE" />
      <input type="submit" value="Register" />
    </div>
  </fieldset>
</form>

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test";

//Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
 //Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}


$sql = "INSERT INTO MyGuests (name, email, password)
VALUES ($_POST[name], $_POST[e-mail], $_POST[password])";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;//
}

$conn->close();
var_dump('name', 'e-mail', 'password');

?>

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test";
$name=$_POST['name']

//Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
 //Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}


$sql = "INSERT INTO MyGuests (name, email, password)
VALUES ('name','email', 'password');

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;//
}

$conn->close();
var_dump('name', 'e-mail', 'password');

?>