function addBook(Book $newBook) { $db = new ServerDatabase(); $db->newQuery("INSERT INTO book (author, title, image, category) VALUES ('%1', '%2', '%3', %4)"); $db->addParameter($newBook->author); $db->addParameter($newBook->title); $db->addParameter($newBook->image); $db->addParameter($newBook->category); $db->execute(); return $db->getLastInsertId() > 0; }