foreach ($this->records as $book) { // print_r($book); if ($book['isbn'] !== $isbn) { continue; } echo "<p><b>{$book['title']}</b> by " . implode(', ', $book['author']) . "</br>"; echo "ISBN: {$book['isbn']}<br/>"; echo "Comment: {$book['comment']}</p>\n"; } echo "<p>Back to the <a href=\"{$_SERVER['PHP_SELF']}\"> list of books </a><p>\n"; } } ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>My Library</title> </head> <body> <?php $library = new BookList("books.xml"); if (isset($_GET['isbn'])) { $library->showBook($_GET['isbn']); } else { $library->showMenu(); } ?> </body> </html>