Fatal error: Uncaught Error: Call to a member function bind_param() on bool in /home/kitapcadiri/public_html/src/book/BookDao.php:217 Stack trace: #0 /home/kitapcadiri/public_html/src/book/BookController.php(43): src\book\BookDao->getPriceHistory() #1 /home/kitapcadiri/public_html/index.php(47): src\book\BookController->getBook() #2 {main} thrown in /home/kitapcadiri/public_html/src/book/BookDao.php on line 217