Updated theme handling and got the category form to clone rows.

db/category.php

@@ -3,7 +3,7 @@
 
     function get_category_items()
     {
-        global $conn;
+        $conn = get_db_connection();
         $items = mysqli_query($conn, "SELECT * FROM `category`");       
         $conn->close();
 
@@ -12,7 +12,7 @@
 
     function create_category($name)
     {
-        global $conn;
+        $conn = get_db_connection();
         $statement = $conn->prepare("INSERT INTO `category` (category_name) VALUES (?)");
         $statement->bind_param("s", $name);
         if($statement->execute() == true){

db/db.php

@@ -1,9 +1,23 @@
 <?php
-    $host = '127.0.0.1:3306';
-    $user_name = 'root';
-    $password = '1a9t7y';
-    $db_name = 'inventory';
-    
-    $conn = mysqli_connect($host, $user_name, $password, $db_name) or die("Failed to 
-    connect to MySQL: " . mysqli_error($conn));
+    function get_db_connection(){
+        $host = '127.0.0.1:3306';
+        $user_name = 'root';
+        $password = '1a9t7y';
+        $db_name = 'inventory';
+        
+        $conn = mysqli_connect($host, $user_name, $password, $db_name) or die("Failed to 
+        connect to MySQL: " . mysqli_error($conn));
+
+        return $conn;
+    }
+
+    function get_supported_data_types(){
+        return [
+            "date" => "Date",
+            "money" => "money",
+            "text" => "Long Description",
+            "varchar" => "Short Text",
+            "integer" => "Count"
+        ];
+    }
 ?>

db/item_info.php

@@ -2,13 +2,20 @@
     require "db.php";
 
     function get_item_base_attributes(){
-        global $conn;
+        $conn = get_db_connection();
+        $rows = [];
         $query = "SELECT COLUMN_NAME
                   FROM INFORMATION_SCHEMA.COLUMNS
                   WHERE TABLE_SCHEMA = 'inventory' AND TABLE_NAME = 'item_info';";
-        $data = mysqli_query($conn, $query);        
+        $data = mysqli_query($conn, $query);
+
+        while($row = mysqli_fetch_array($data)){
+            $rows[] = str_replace("_", " ", $row["COLUMN_NAME"]);
+        }
+
+        $data->free();
         $conn->close();
 
-        return $data;
+        return $rows;
     }
 ?>