Untitled

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

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>
  <h2>New users</h2>
  <form method="POST" action="index.php">
    <h4>First Name: <input type="text" name="fname"></h4>
    <h4>Last Name: <input type="text" name="lname"></h4>
    <h4>Email: <input type="email" name="email"></h4>
    <h4>Password: <input type="password" name="pwd"></h4>

    <button type="submit" name="submit" value="submit"> Register</button>
  </form>

</body>

</html>

<?php
$servername = "localhost";
$username = "root";
$password = "";
$db = "libdb";

$conn = new mysqli($servername, $username, $password, $db);

if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect_error);
}

$fname = $_POST['fname'];
$lname = $_POST['lname'];
$email = $_POST['email'];
$pwd = $_POST['pwd'];
$sql = "INSERT INTO user_tbl (fname, lname, email, pswd) VALUES ('$fname', '$lname', '$email', '$pwd')";
if ($conn->query($sql) === TRUE) {
  echo "You have successfully registered. You may use your credentials to login now.";
} else {
  echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
?>