function getAllItemsInCategory($categoryName) { $db = new PDO(...); $stmt = $db->prepare("SELECT * FROM items WHERE category = ?"); $stmt->execute([$categoryName]); return $stmt->fetchAll(); }In this code example, the getAllItemsInCategory function takes in a category name and uses it to select all items from the items table in a database with that category. This function can be used in any PHP application that requires fetching multiple items from a database based on a category. The package library used in this example is PDO, a PHP extension for database connections and queries.