$firstBook = new Book("Core PHP Programming, Third Edition", "Atkinson and Suraski");
$secondBook = new Book("PHP Bible", "Converse and Park");
$thirdBook = new Book("Design Patterns", "Gamma, Helm, Johnson, and Vlissides");
$books = new BookList();
$books->addBook($firstBook);
$books->addBook($secondBook);
$books->addBook($thirdBook);
echo "Testing the Iterator" . tagins("br");
$booksIterator = new BookListIterator($books);
while ($booksIterator->hasNextBook()) {
$book = $booksIterator->getNextBook();
echo "getting next book with iterator : " . tagins("br");
echo $book->getAuthorAndTitle();
echo tagins("br") . tagins("br");
}
$book = $booksIterator->getCurrentBook();
echo "getting current book with iterator : " . tagins("br");
echo $book->getAuthorAndTitle();
echo tagins("br") . tagins("br");
echo tagins("br");
echo "Testing the Reverse Iterator" . tagins("br");
$booksReverseIterator = new BookListReverseIterator($books);
while ($booksReverseIterator->hasNextBook()) {
$book = $booksReverseIterator->getNextBook();
echo "getting next book with reverse iterator : " . tagins("br");
echo $book->getAuthorAndTitle();
echo tagins("br") . tagins("br");
}
$book = $booksReverseIterator->getCurrentBook();
echo "getting current book with reverse iterator : " . tagins("br");
echo $book->getAuthorAndTitle();
