<?php
  $username = filter_input(INPUT_POST, 'username');
  $password = filter_input(INPUT_POST, 'password');
  if (!empty($username)){
    if (!empty($password)){
      $host = "localhost";
      $dbusername = "root";
      $dbpassword = "";
      $dbname = "test";
      // Create connection
      $conn = new mysqli ($host, $dbusername, $dbpassword, $dbname);
      if (mysqli_connect_error()){
        die('Connect Error ('. mysqli_connect_errno() .') '. mysqli_connect_error());
      }
      else{
        $sql = "INSERT INTO account (username, password)
        values ('$username','$password')";
        if ($conn->query($sql)){
          echo "New record is inserted sucessfully";
        }
        else{
          echo "Error: ". $sql ." ". $conn->error;
        }
        $conn->close();
      }
    }
    else{
      echo "Password should not be empty";
      die();
    }
  }
  else{
    echo "Username should not be empty";
    die();
  }
?>