ini save register

<?php
include "koneksi.php";
$nama     = $_POST['nama'];
$username = $_POST['username'];
$password = $_POST['password'];
$email    = $_POST['email'];
$alamat   = $_POST['alamat'];
$ponsel   = $_POST['ponsel'];


if (empty($nama)){
echo "<script>alert('Nama belum diisi')</script>";
echo "<meta http-equiv='refresh' content='1 url=daftar.php'>";
}else
if (empty($email)){
echo "<script>alert('Email belum diisi')</script>";
echo "<meta http-equiv='refresh' content='1 url=daftar.php'>";
}else
if(empty($username)){
echo "<script>alert('Username belum diisi')</script>";
echo "<meta http-equiv='refresh' content='1 url=daftar.php'>";
}else
if (empty($password)){
echo "<script>alert('Password belum diisi')</script>";
echo "<meta http-equiv='refresh' content='1 url=daftar.php'>";
}else{
$daftar = mysql_query("INSERT INTO users (id_user,nama,username,password) values ('',$nama','$username','$password','$email','$alamat','$ponsel')");

//tolong diperhatikan lagi scriptnya lihat perbedaanya
//agar kamu bener2 paham
//$daftar = mysql_query("INSERT INTO users (id_user,nama,username,password) values ($nama','$email','$username','$password')");
if ($daftar){
echo "<script>alert('Berhasil Mendaftar')</script>";
echo "<meta http-equiv='refresh' content='1 url=login.php'>";
}else{
echo "<script>alert('Gagal Mendaftar')</script>";
echo "<meta http-equiv='refresh' content='1 url=daftar.php'>";
}
}
?>