<?php
    $dbServername = "localhost";
    $dbUsername = "root";
    $dbPassword = "";
    $dbName = "login";

    $realname = $_POST['realname'];
    $nick = $_POST['nick'];
    $pass = $_POST['pass'];
    $rpass = $_POST['rpass'];
    $reqlen = strlen($nick) * strlen($pass) * strlen($rpass);

    if($reqlen > 0) {
        if($pass === $rpass){
            $conn = mysqli_connect($dbServername, $dbUsername, $dbPassword, $dbName);
            if($conn){
                $pass = md5($pass);
                $insertar = "INSERT INTO login(id, realname, nick, pass) VALUES ('','$realname','$nick','$pass')";
                $resultado = mysqli_query($conn,$insertar);
                if(!$resultado){
                    header('Location: index1.php');
                    echo 'Error al Registrarse.';
                } else {
                    header('Location: index1.php');
                    echo 'Registrado Correctamente.';
                }
                mysqli_close($conn);
            }
        } else {
            echo 'Por favor, introduzca dos contraseñas idénticas.';
            header('Location: index1.php');
        }
    } else {
        echo 'Por favor, rellene todos los campos obligatorios.';
        header('Location: index1.php');
    }
?>