Get the value from my Database (MySQL) and manipulate GameObjects automatically

Question

Inside Unity I had prefabs, it calls "PropertyContainer" it filled with 2 text game object(Room_Type and Room_Qty) that I want to change it dynamically from my database. I had try to learn and watch any youtube tutorial and on the internet. After several weeks try searching and watching I still can't figure it out how to implementing into my code.

Below is my code that I got from several tutorial and some cases on the internet.
First code, is my php code that I used:

<?php
require 'Connection.php';

//Check Connection
if ($conn->connect_error){
    die("Connection Failed: " . $conn->connect_error);
}

//Create Variable Submitted
$ID_Type = 2;

$sql = "SELECT Room_Type, Room_Qty FROM House WHERE ID_Type = '" . $ID_Type . "'";
$result = $conn->query($sql);

if ($result->num_rows > 0){
    //Output data of each row.
    $rows = array();

    while ($row = $result->fetch_assoc()) {
        $rows[] = $row;
    }
    //After the whole array is created.
    echo json_encode($rows);
}else {
    echo "Zero Result";
}

$conn->close();?>

It calls GetStockHouse_RoseType.php, After it is successfully to show my value to be a Json file then the next step I need to call it into my Unity. There are several code that I'm used in unity.
Second code, using C# it called Web.cs:

public IEnumerator GetPropertyStock(string ID_Type, Action<string> callback)

{
    WWWForm form = new WWWForm();<br>
    form.AddField("ID_Type", ID_Type);

    using (UnityWebRequest www = UnityWebRequest.Get("http://localhost/xxxDB/GetStockHouse_RoseType.php"))
    {
        yield return www.SendWebRequest();

        if (www.isNetworkError || www.isHttpError)
        {
            Debug.Log(www.error);
        }
        else
        {
            //Show results as a text.
            Debug.Log(www.downloadHandler.text);
            string jsonArray = www.downloadHandler.text;

            callback(jsonArray);
        }
    }
}

Third code, called Items.cs:

Action<string> _createItemsCallback;
// Use this for initialization
void Start () {

    _createItemsCallback = (jsonArrayString) => {
        StartCoroutine(CreateItemsRoutine(jsonArrayString));
    };

    CreateItems();

}

// Update is called once per frame
public void CreateItems() {
    StartCoroutine(Main.Instance.Web.GetPropertyStock(_createItemsCallback));
}

IEnumerator CreateItemsRoutine(string jsonArrayString)
{
    //Parsing json array string as an array
    JSONArray jsonArray = JSON.Parse(jsonArrayString) as JSONArray;

    for (int i = 0; i < jsonArray.Count; i++)
    {
        //Create local variables
        bool isDone = false; //Are we done downloading?
        string ID_Type = jsonArray[i].AsObject["ID_Type"];
        JSONObject itemInfoJson = new JSONObject();

        //Create a callback to get the information from Web.cs
        Action<string> getItemInfoCallback = (itemInfo) =>
        {
            isDone = true;
            JSONArray tempArray = JSON.Parse(itemInfo) as JSONArray;
            itemInfoJson = tempArray[0].AsObject;
        };

        StartCoroutine(Main.Instance.Web.GetPropertyStock(ID_Type, getItemInfoCallback));

        //Wait until the callback is called from the Web (info finished downloading).
        yield return new WaitUntil(() => isDone == true);

        //Instantiate GameObject (item prefab).
        GameObject item = Instantiate(Resources.Load("Prefabs/PropertiContainer") as GameObject);
        item.transform.SetParent(this.transform);
        item.transform.localScale = Vector3.one;
        item.transform.localPosition = Vector3.zero;

        //Fill Information.
        item.transform.Find("Room_Type").GetComponent<Text>().text = itemInfoJson["Room_Type"];
        item.transform.Find("Room_Qty").GetComponent<Text>().text = itemInfoJson["Room_Qty"];
    }
    yield return null;
}

Fourth code, called Main.cs:

public static Main Instance;

public Web Web;

// Use this for initialization
void Start () {
    Instance = this;
    Web = GetComponent<Web>();
}

NOTES:
The second and the fourth code is set in into one(1) Empty Object on Unity while the third code is set in the parents that called PropertyContainer.

Bellow is the picture from my Unity: Picture No. 1) Main.cs & Web.cs set it into one Empty Object and also look oh my Game object for Room_Type and Room_Qty.

Main.cs & Web.cs

Item.cs

Unity File

What I expected is two (2) text Game Objects (Room_Type and Room_Qty) on PropertyContainer can change into my .php code. I hope all that information can fully understand.