<?php

$username = filter_input(INPUT_POST, 'username');
$password = filter_input(INPUT_POST, 'password');
if(!empty($username)){
  $host = "localhost";
  $dbusername = "root";
  $dbpassword = "";
  $dbname = "login";

$conn = new mysqli ($host, $dbusername, $dbpassword, $dbname);

if(mysqli_connect_error()){
  die('Connect Error('.mysqli_connect_errno().')'
  .mysqli_connect_error());
}
else{
  $sql = "INSERT INTO testdb (username, password) values ('$username',
'$password')";
  if($conn->query($slq)){
    echo "New record is inserted successfully!";
  }
  else{
    echo "Error: ". $sql ."<br>". $conn->error;
  }
  $conn->close();

}
else {
  echo "Password should not be empty";
}
else{
  echo "Username should not be empty";
}

 ?>