PHP PDO How to extract MySQL data to multidimensional array without number keys inside

Question

Hi guys I am trying to write simple program that extracts data from database using PDO, save it as multidimensional array and then convert it to XML.

The problem is that I cannot have numeric key that contains zero, because I am using Array2XML class for conversion and this class converts all keys to xml tags (and error tells me that tag with 0 inside is illegal).

So is there any way to extract data from database into multidimensional array and avoid getting 0 (I do not mind skipping using numeric keys at all)? Here is my code:

<?php

require 'config.php';
require 'array2xml.php';

//get username and password
$config = new Config();

$user = $config->getUser();
$pass = $config->getPass();

//create connection object
try {

    $dbc = new PDO('mysql:host=localhost;dbname=StudentDB',
        $user, $pass);
    echo 'Connection established <br>';
}

catch(PDOException $e) {
    echo "An error occured while connecting to database: "
        . $e->getMessage();
}

$sql = $dbc->query('SELECT * FROM student');

$result = $sql->fetchALL(PDO::FETCH_CLASS);

echo "<pre>" . print_r($result, true) . "<pre/>";

echo "<br>";
echo "<br>";

//create object of class capable of conversion
$convert = new Array2XML();

$xml = $convert::createXML("Student", $result);

$xmlstring = $xml->saveXML();

echo "<pre>" . $xmlstring . "<pre/>";

I would like to seek your wisdom and ask for help. Thank you

Here is the proof that my question is different from:

PDO fetchAll group key-value pairs into assoc array

1. In this question you are linking to he is not sure about his mysql query - he is not selecting entire table in raw format - and I am!
2. His question has nothing to do with xml - NOTHING!
3. If I am correct he is one step ahead of me so there is no way that solution for his problem wll work for me.