C# PHP returns a blank message

Hello, I'm working on a login script which I have several questions on here about it. However, it completely stopped working so I'm starting over from scratch. Below I have posted both the unity c# code as well as the php code. The problem is that the php code doesn't return anything or the unity c# w.text isn't working. The print out in the console is completely blank. Why? Thanks for any help.

 using UnityEngine;
 using System.Collections;
 
 public class Login : MonoBehaviour {
 
  public Texture LoginBackground;
  public Texture2D stylebackground;
  public GUIStyle LoginStyle;
  public GUIStyle LoginTextBox;
  public GUIStyle LoginButton;
  public string Username;
  public string Password;
  public float transparent;
  private string url;
  public WWW w;
  public WWWForm loginform;
  // Use this for initialization
  void Start () {
  LoginStyle.fontSize = 72;
  LoginStyle.alignment = TextAnchor.MiddleCenter;
  LoginTextBox.fontSize = 20;
  LoginTextBox.alignment = TextAnchor.MiddleCenter;
  LoginTextBox.normal.background = stylebackground;
  LoginButton.fontSize = 30;
  LoginButton.alignment = TextAnchor.MiddleCenter;
  url = "http://redlightlife.tk/scripts/checklogin.php";
  loginform = new WWWForm();
  }
  
  // Update is called once per frame
  void Update () {
  
  }
  
  void OnGUI() {
  GUI.backgroundColor = Color.black;
  GUI.DrawTexture(new Rect(0,0,Screen.width,Screen.height),LoginBackground,ScaleMode.StretchToFill, false, 0.0f);
  GUI.Label(new Rect(Screen.width/2-250,Screen.height/2-250,500,250),"Username:", LoginStyle);
  Username = GUI.TextField(new Rect(Screen.width/2-250,Screen.height/2-80,500,50), Username, 10, LoginTextBox);
  GUI.Label(new Rect(Screen.width/2-250,Screen.height/2-50,500,250),"Password:", LoginStyle);
  Password = GUI.TextField(new Rect(Screen.width/2-250,Screen.height/2+120,500,50), Password, 10, LoginTextBox);
  if (GUI.Button(new Rect(Screen.width/2-150,Screen.height/2+200,300,50),"Login:", LoginButton))
  {
  //CheckLogin();
  StartCoroutine(CheckLogin());
  }
  }
  
  IEnumerator CheckLogin()
  {
  loginform.AddField("username", Username);
  loginform.AddField("password", Password);
  w = new WWW(url,loginform);
  yield return w;
  Debug.Log("Downloaded");
  if (w.error != null)
  {
  print(w.error);
  }
  if (w.error == null)
  {
  print("Fetching Data");
  print("Username=" + Username);
  print ("Passowrd=" + Password);
  string formText = w.text;
  w.Dispose();
  print(formText);
  }
  }
 }

  <?php 
  function main($formUse = true)
  {
 $link = mysql_connect("bondsolutionsnjcom.fatcowmysql.com", "lightswitch", "electricity2012"); 
 if (!$link) { 
     die('Could not connect: ' . mysql_error()); 
 } 
 echo 'Connected successfully'; 
 mysql_select_db('red_light_life_accounts1');
 }
 ?>