Saving a leaderboard using PHP and C#.

Hello all. I'm trying to save my leaderboard to a MySQL database. I'm using the XAMPP package and am running Apache and MySQL as I type. The php file is located in E:\xampp\htdocs\hunted_vr\scores.php. The database contains one table (score_details) and three columns. player_id (an AI primary key), player_name and player_score.

The scores.php reads:

 <?php
 
  $pn = $_REQUEST['player_name'];
  
  $ps = $_REQUEST['player_score'];
  
  @ $db = new mysqli('localhost', 'root', 'root', 'bot');
             if (mysqli_connect_errno()) {
                 echo 'Error: Could not connect to database.  Please try again later.';
                 exit;
             }
     $q1 = "INSERT INTO `leaderboard`.`score_details` (`player_id`, `player_name`, `player_score`) VALUES (NULL, '$pn', '$ps');";    
 
 ?>

My C# is attached to an empty game object in my scene. It is located in my game folder, which is somewhere in E:\Documents\Hunted_VR\Game Assets\Scripts\

It reads:

 using UnityEngine;
 using System.Collections;
 
 public class SendScore : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
 
         PostScore("Test", 100);
     }
 
     private void PostScore(string name, int score)
     {
         string url = "localhost/hunted_vr/scores.php";
 
         WWWForm form = new WWWForm();
         form.AddField("name", name);
         form.AddField("score", score.ToString());
         WWW www = new WWW(url, form);
 
         StartCoroutine(WaitForRequest(www));
     }
     
     IEnumerator WaitForRequest(WWW www)
     {
         yield return www;
  
     // check for errors
         if (www.error == null)
         {
             Debug.Log("WWW Ok!: " + www.text);
         } 
         else 
         {
             Debug.Log("WWW Error: "+ www.error);
         }
     }  
 }
 

Any and all help appreciated. Currently the game compiles and runs, and my C# check for errors returns 'WWW Ok!' but the php and C# do not seem to be communicating together.