function add_book_control() { if (filter_input(INPUT_GET, 'title') && filter_input(INPUT_GET, 'author') && filter_input(INPUT_GET, 'yr') && filter_input(INPUT_GET, 'price')) { $obj = new books(); $title = sanitize_string(filter_input(INPUT_GET, 'title')); $author = sanitize_string(filter_input(INPUT_GET, 'author')); $year = sanitize_string(filter_input(INPUT_GET, 'yr')); $price = sanitize_string(filter_input(INPUT_GET, 'price')); $desc = sanitize_string(filter_input(INPUT_GET, 'desc')); $isbn = sanitize_string(filter_input(INPUT_GET, 'isbn')); if ($obj->add_book($title, $author, $desc, $isbn, $year, $price)) { echo '{"result":1,"message": "book added"}'; } else { echo '{"result":0,"message": "book add unsuccessful"}'; } } }