XML : How do I import XML data to MySQL? (Linux hosting with cPanel from Godaddy)

I am attempting to import XML data into a MySQL database but I don't know how to make this work. I am using Linux hosting with cPanel from Godaddy with php 5.4. This script is from a tutorial, but even after filling out the necessary MySQL login information, it results in a blank page and no information is being added to the database table. What am I doing wrong?

  <?php    $url ="XML.php";  $ch = curl_init();  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  curl_setopt($ch, CURLOPT_URL, $url);    $data = curl_exec ($ch);  curl_close($ch);    $xml = simplexml_load_string($data);    $con=mysql_connect("localhost","dbusername","dbpassword");  mysql_select_db("dbname", $con) or die(mysql_error());    foreach ($xml -> item as $row) {          $title = $row -> title;          $description = $row -> description;          $categories = $row -> categories;    $sql = "INSERT INTO 'test_xml' ('title', 'description', 'categories')"              . "VALUES ('$title', '$description', '$categories')";    $result = mysql_query($sql);  if (!$result) {      echo 'MySQL ERROR';      } else {      echo ' SUCCES';      }    ?>