Added a class to retrieve the basic item information data.

db/category.php

@@ -1,8 +1,25 @@
 <?php
+    require "db.php";
 
-    function get_category_items($db)
+    function get_category_items()
     {
-        return mysqli_query($db, "SELECT * FROM `category`");       
+        global $conn;
+        $items = mysqli_query($conn, "SELECT * FROM `category`");       
+        $conn->close();
+
+        return $items;
     }
 
+    function create_category($name)
+    {
+        global $conn;
+        $statement = $conn->prepare("INSERT INTO `category` (category_name) VALUES (?)");
+        $statement->bind_param("s", $name);
+        if($statement->execute() == true){
+
+        }
+
+        $statement->close();
+        $conn->close();
+    }
 ?>