Hello guys welcome back to my blog therichpost.com. Today in this blog post we will tell you How to generate a unique QR code for every purchased product in WooCommerce?

Guys if you are new in  WordPress or in  WooCommerce then please check the below links for some good tutorials:

1. WooCommerce Hooks
2. WordPress Tricks
3. WordPress Hooks
4. Dokan

What We’ll Build

1. Generate unique QR code per purchased product
2. QR code contains Order ID + Product ID (or any data you want)
3. QR code saved as real image (PNG)
4. Display QR on:

• Thank You page
• Order details
• Admin order page
• Emails (optional)

Step 1: Install QR Code Library (PHP)

WooCommerce doesn’t include QR generation by default, so we’ll use a lightweight library.

Option A (Recommended): Endroid QR Code (PHP)

If you use Composer:

composer require endroid/qr-code

If no Composer, use Google Chart API (simpler – shown below).

Step 2: Generate QR Code After Order Is Placed

Hook: woocommerce_checkout_order_processed

Add this to functions.php or a custom plugin:

add_action('woocommerce_checkout_order_processed', 'generate_qr_for_each_product', 10, 3);

function generate_qr_for_each_product($order_id, $posted_data, $order) {
    $upload_dir = wp_upload_dir();
    $qr_dir = $upload_dir['basedir'] . '/order-qr/';

    if (!file_exists($qr_dir)) {
        wp_mkdir_p($qr_dir);
    }

    foreach ($order->get_items() as $item_id => $item) {
        $product_id = $item->get_product_id();

        // Data you want inside QR
        $qr_data = json_encode([
            'order_id'   => $order_id,
            'product_id' => $product_id,
            'email'      => $order->get_billing_email()
        ]);

        // QR image path
        $qr_file = $qr_dir . "order-{$order_id}-product-{$product_id}.png";

        // Generate QR (Google Chart API)
        $qr_url = 'https://api.qrserver.com/v1/create-qr-code/?size=300x300&data=' . urlencode($qr_data);

        file_put_contents($qr_file, file_get_contents($qr_url));

        // Save QR path in order item meta
        wc_add_order_item_meta($item_id, '_product_qr', $qr_file);
    }
}

This creates real PNG images
Stored in /wp-content/uploads/order-qr/

Step 3: Show QR Code on Thank You Page

add_action('woocommerce_thankyou', 'show_qr_on_thankyou_page');

function show_qr_on_thankyou_page($order_id) {
    $order = wc_get_order($order_id);
    $upload_dir = wp_upload_dir();

    echo '<h3>Your Product QR Codes</h3>';

    foreach ($order->get_items() as $item_id => $item) {
        $qr_path = wc_get_order_item_meta($item_id, '_product_qr', true);

        if ($qr_path) {
            $qr_url = str_replace($upload_dir['basedir'], $upload_dir['baseurl'], $qr_path);

            echo '<div style="margin-bottom:20px">';
            echo '<strong>' . esc_html($item->get_name()) . '</strong><br>';
            echo '<img src="' . esc_url($qr_url) . '" width="150">';
            echo '</div>';
        }
    }
}

Step 4: Show QR Code in Admin Order Page

add_action('woocommerce_after_order_itemmeta', function ($item_id) {
    $qr_path = wc_get_order_item_meta($item_id, '_product_qr', true);
    if ($qr_path) {
        $upload_dir = wp_upload_dir();
        $qr_url = str_replace($upload_dir['basedir'], $upload_dir['baseurl'], $qr_path);
        echo '<p><strong>Product QR:</strong><br><img src="' . esc_url($qr_url) . '" width="100"></p>';
    }
});

(Optional) Add QR Code to Order Emails

add_action('woocommerce_email_after_order_table', function ($order) {
    $upload_dir = wp_upload_dir();

    echo '<h3>Product QR Codes</h3>';
    foreach ($order->get_items() as $item_id => $item) {
        $qr_path = wc_get_order_item_meta($item_id, '_product_qr', true);
        if ($qr_path) {
            $qr_url = str_replace($upload_dir['basedir'], $upload_dir['baseurl'], $qr_path);
            echo '<img src="' . esc_url($qr_url) . '" width="120" style="margin-right:10px;">';
        }
    }
});

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Common Use Cases

• Event tickets
• Product authenticity check
• Digital downloads
• Warranty verification
• Crypto / NFT access
• Scan-to-verify purchases

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Final Notes

• No plugin needed
• Works with any WooCommerce theme
• Lightweight & fast
• Fully customizable QR content

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Guy if you have any query feel free to contact me.

Ajay

Thanks