<?php
  $username = $_POST["username"];
  $password = md5($_POST["password"]);
  echo "Username:" . ($username) . "<br>";
  echo "Password:" . ($password) . "<br>";
      try {
        $conn = new PDO("mysql:host=localhost;dbname=actividad", 'root', '');
        $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $sql = "INSERT INTO users (nombre, password) VALUES ('${username}', '${password}')";
        $conn->exec($sql);
        echo "Usuario creado correctamente";
      }
      catch(PDOException $e) {
        echo $sql . "<br>" . $e->getMessage();
      }
      $conn = null;
      $password = null;
 ?>