object(SimpleXMLElement)#1 (1) {
  ["shelf"]=>
  object(SimpleXMLElement)#2 (2) {
    ["@attributes"]=>
    array(1) {
      ["id"]=>
      string(7) "fiction"
    }
    ["book"]=>
    array(2) {
      [0]=>
      object(SimpleXMLElement)#3 (2) {
        ["title"]=>
        string(15) "Of Mice and Men"
        ["author"]=>
        string(14) "John Steinbeck"
      }
      [1]=>
      object(SimpleXMLElement)#4 (2) {
        ["title"]=>
        string(40) "Harry Potter and the Philosopher's Stone"
        ["author"]=>
        string(12) "J.K. Rowling"
      }
    }
  }
}