Fatal error: Uncaught Error: Call to a member function prepare() on null in /home/islamicttf/class/main_class_database.php:108 Stack trace: #0 /home/islamicttf/pages/book_detail.php(40): main_class_database->update_table() #1 {main} thrown in /home/islamicttf/class/main_class_database.php on line 108