upgrade matrice with files

public/userarea/save_packaging_item.php

@@ -0,0 +1,24 @@
+<?php
+include('include/headscript.php');
+header('Content-Type: application/json');
+
+$category = trim($_POST['category'] ?? '');
+$item_name = trim($_POST['item_name'] ?? '');
+$item_code = trim($_POST['item_code'] ?? '');
+
+$allowed = ['PACKAGING_TYPE', 'BOX', 'PALLET', 'OTHER'];
+if (!in_array($category, $allowed, true) || $item_name === '' || $item_code === '') {
+    echo json_encode(['success' => false, 'message' => 'Invalid input']);
+    exit;
+}
+
+$db = DBHandlerSelect::getInstance();
+$pdo = $db->getConnection();
+
+try {
+    $stmt = $pdo->prepare("INSERT INTO packaging_items (category, item_name, item_code) VALUES (?,?,?)");
+    $stmt->execute([$category, $item_name, $item_code]);
+    echo json_encode(['success' => true]);
+} catch (PDOException $e) {
+    echo json_encode(['success' => false, 'message' => $e->getMessage()]);
+}