the DatabaseConnection class

DatabaseConnection.cs

using System.Data;
using System.Data.SqlClient;
using System.Security.Cryptography;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DatabaseConnection : MonoBehaviour
{
	private const string SECRET_KEY = "secretkey";
	private const string ADD_USER_URL = "http://localhost/AddUser.php?";

	public void CreateAccount (string email, string username, string password)
	{
		StartCoroutine (PostCreateAccount (email, username, password));
	}

	IEnumerator PostCreateAccount (string email, string username, string password)
	{
		using (MD5 md5Hash = MD5.Create ())
		{
			string encryptedPass = Crypto.Encrypt (password);
			string hash = GetMd5Hash (md5Hash, email + username + encryptedPass + SECRET_KEY);
			string postUrl = ADD_USER_URL + "email=" + WWW.EscapeURL (email) + "&username=" + WWW.EscapeURL (username) +
				"&password=" + WWW.EscapeURL (encryptedPass) + "&hash=" + WWW.EscapeURL(hash);

			WWW hsPost = new WWW (postUrl);

			yield return hsPost;

			if (hsPost.error != null)
			{
				Debug.Log ("Error adding user: " + hsPost.error);
			}
			else
			{
				Debug.Log ("Returned Data: " + hsPost.text);
			}
		}
	}

	private string GetMd5Hash (MD5 md5Hash, string input)
	{
		byte [] data = md5Hash.ComputeHash (Encoding.UTF8.GetBytes (input));
		StringBuilder builder = new StringBuilder ();
		for (int i = 0; i < data.Length; i++)
		{
			builder.Append (data [i].ToString ("x2"));
		}

		return builder.ToString ();
	}
}