mescole update

public/userarea/update_supplier.php

@@ -0,0 +1,20 @@
+<?php
+include('include/headscript.php');
+header('Content-Type: application/json');
+
+$idsupplier = isset($_POST['idsupplier']) ? (int)$_POST['idsupplier'] : 0;
+$supplier_name = trim($_POST['supplier_name'] ?? '');
+$vat = trim($_POST['vat'] ?? '');
+
+if ($idsupplier <= 0 || $supplier_name === '') {
+    echo json_encode(['success' => false, 'message' => 'Invalid input']);
+    exit;
+}
+
+$db = DBHandlerSelect::getInstance();
+$pdo = $db->getConnection();
+
+$stmt = $pdo->prepare("UPDATE suppliers SET supplier_name = ?, vat = ? WHERE idsupplier = ?");
+$ok = $stmt->execute([$supplier_name, $vat !== '' ? $vat : null, $idsupplier]);
+
+echo json_encode(['success' => (bool)$ok]);