if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['add'])) $id = (int)($_POST['product_id'] ?? 0); $qty = max(1, (int)($_POST['quantity'] ?? 1)); add_to_cart($id, $qty); header('Location: ' . $_SERVER['PHP_SELF']); exit;
<?php // ... (database connection code remains the same) php id 1 shopping top
$stmt = $pdo->prepare('SELECT * FROM products WHERE id = :id'); $stmt->execute(['id' => $_GET['id']]); $product = $stmt->fetch(); $qty = max(1
: This prevents Cross-Site Scripting (XSS) by ensuring any text from the database is rendered safely in the browser. Error Handling (int)($_POST['quantity'] ?? 1))
A standard SQL query to display "top" products might look like this:
Here is a useful write-up covering the technical implementation, the security risks, and best practices.
