Mysql/PHP Grab specific data

I am trying to get a text field and a button for a player to enter in his/her username and then unity sends a get request to a .php and then sends unity the specific player data. In this case I am trying to get player's coordinates. So the player enters their username and it sends back a vector3 data.

Here is my PHP script. Name is the username, age is X, age2 is Y, age3 is Z.

     <?php
         $con = new mysqli("localhost","root","","game");
 
         if(isset($_POST['name']) && isset($_POST['age']) && isset($_POST['age2']) && isset($_POST['age3'])){
         $name = $_POST['name'];
         $age = $_POST['age'];
         $age2 = $_POST['age2'];
         $age3 = $_POST['age3'];
         
         
         
         $query = $con->query("SELECT * FROM items WHERE name='$name'");
         if($query->num_rows > 0){
         $con->query("UPDATE items SET age='$age' , age2='$age2', age3='$age3' WHERE name='$name'");
         }
         else{
             $con->query("INSERT INTO items (name,age,age2,age3) VALUES ('$name', '$age', '$age2', '$age3')");
         }
         }
         $result = $con->query("SELECT * FROM items");
         if($result->num_rows > 0){
             echo(";");
             while($row = $result->fetch_assoc()){
                 echo("Name:".$row["name"] . "|X:" . $row["age"] . "|Y:" . $row["age2"] . "|Z:" . $row["age3"] . ";");
             }
         }
         else{
             echo("Database is empty");
         }
     ?>
 

I don't have anything great for a working C# script but I have this which separates the data but that doesn't help me if I need only a specific player's data. using UnityEngine; using System.Collections;

 public class Location : MonoBehaviour {
 
     private string textFieldString = "Username";
 
     void OnGUI ()
     {
         textFieldString = GUI.TextField(new Rect(500, 25, 100, 30), textFieldString, 25);
 
 
         GUI.Label(new Rect(505, 75, 100, 100), textFieldString);
     }
 
     public string[] items;
 
     // Use this for initialization
     IEnumerator Start () {
         WWW itemsData = new WWW("localhost/game/plrdata.php");
         yield return itemsData;
         string itemsDataString = itemsData.text;
         print(itemsDataString);
         items = itemsDataString.Split(';');
     }
     
 
 }