What are the potential pitfalls of transitioning from Matt Wright Script to PHP for processing orders in an online shop?

Potential pitfalls of transitioning from Matt Wright Script to PHP for processing orders in an online shop include compatibility issues, lack of support for outdated functions, and security vulnerabilities. To address these issues, it is important to thoroughly test the PHP code, update any deprecated functions, and implement secure coding practices.

// Sample PHP code snippet for processing orders in an online shop
<?php

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Process order
$order_id = $_POST['order_id'];
$product_id = $_POST['product_id'];
$quantity = $_POST['quantity'];

// Insert order details into database
$sql = "INSERT INTO orders (order_id, product_id, quantity) VALUES ('$order_id', '$product_id', '$quantity')";

if ($conn->query($sql) === TRUE) {
    echo "Order processed successfully";
} else {
    echo "Error processing order: " . $conn->error;
}

// Close connection
$conn->close();

?>