use mysql and javascript to update text

Hi Just a couple of questions,

1.does this code work in a responsive project and publish to devices i.e.html 5?

2. does it work without needing a button      press, I just want to display text on the first slide when project is open.

3. would this work:

var myArray = new object();

if (window.XMLHttpRequest)

{

xmlhttp=new XMLHttpRequest();

}

else

{

xmlhttp.open("GET","testCase.php?q=",true);

xmlhttp.send();

window.cpAPIInterface.setVariableValue("testCase","");

then the php would look like this:

<?php

require 'database        .php';

$id=null;

if (!empty ($_GET      ['id'])) {

$id = $_REQUEST['id'];

}

if (null ==$id){

header("Location:index.php");

} else {

$pdo->  setAttr       ibute(PDO::ATTR_ERRMODE_EXCEPTION);

$sql = "SELECT  *   FROM drugs where id= ?";

$q = $pdo_>prepare($sql);

$q->execute (array($id));

$data -$q->fetch(PDO;;FETCH_ASSOC);

Database:: disconnect();

}

echo $data ['question1'];

i'm not sure i've got the php quite right though.