DOM Lendo XML

Olá,

encontrei na NET o seguinte XML e Php que faria sua leitura:

XML

<?xml version="1.0" encoding="ISO-8859-1" ?> <books> <book> <author>Jack Herrington</author> <title>PHP Hacks</title> <publisher>O'Reilly</publisher> </book> <book> <author>Jack Herrington</author> <title>Podcasting Hacks</title> <publisher>O'Reilly</publisher> </book> </books>
**PHP**<?php $doc = new DOMDocument(); $doc->load( 'books.xml' ); $books = $doc->getElementsByTagName( "book" ); foreach( $books as $book ) { $authors = $book->getElementsByTagName( "author" ); // <- ESSA É A LINHA 9 $author = $authors->item(0)->nodeValue; $publishers = $book->getElementsByTagName( "publisher" ); $publisher = $publishers->item(0)->nodeValue; $titles = $book->getElementsByTagName( "title" ); $title = $titles->item(0)->nodeValue; echo "$title - $author - $publisher\n"; } ?>

Está aparecendo o seguinte erro mas eu não consigo entender, alguém pode ajudar?

Parse error: parse error, unexpected T_OBJECT_OPERATOR in lerbooks.php on line 9