WWW does not work on localhost

I want to access the data from my WAMP based database on localhost using the below script.I have placed my php code inside wamp by creating a folder called unity_db.I have taken the build of the project,the build project is not connecting to the database.Can anybody plz help me

  IEnumerator  handleLogin(string user,string pass)
         {
         string login_url = loginCode + "?username=" + user + "&password=" + pass; 
         WWW logindata = new WWW (login_url);
         yield return logindata;
         if (logindata.text == "right") 
         {
         output = "login successful";        
         } 
         else {
             output="invalid user pass";
             }          
         }