Shopify App Development Made Simple with HTTP APIs and Guzzle
Feb 10, 2025 pm 02:58 PM
This tutorial guides you through building a basic Shopify app using PHP to list store products. The complete code is available on GitHub.
Key Concepts:
- Leverage the Shopify HTTP API to extend store functionality (adding customers, fetching product lists, etc.).
- Utilize a Shopify Partner Account to create development stores for testing without impacting live stores.
- Develop and configure a development store to experiment with app features, add products, and simulate purchases.
- Build Shopify apps via the Shopify Partner website, managing user authentication and authorization.
- Employ Guzzle (a PHP HTTP client) for efficient API requests and authentication.
- Implement OAuth for secure user authentication and authorized API access.
What are Shopify Apps?
Shopify apps enhance Shopify store functionality or provide e-commerce capabilities to websites/mobile apps. Methods include:
- HTTP API: Enables web apps to perform various actions within a Shopify store (adding customers, retrieving product lists, using webhooks).
- JavaScript Buy SDK: Retrieves product information, manages carts, and handles checkout from websites or hybrid mobile apps (Cordova).
- Embedded App SDK: Integrates your web app directly into the Shopify admin interface (useful for admin settings pages).
- iOS and Android Buy SDKs: Integrate Shopify checkout into native mobile apps.
- Shopify POS App SDK: Embeds web apps within the Shopify POS system.
This tutorial focuses on the HTTP API.
Shopify Partner Account Setup:
Begin by creating a Shopify Partner Account. This allows you to create a development store for testing. You'll provide information such as your company name, business type, email, website, and password.
Successful registration leads to:
Development Store Creation:
Create a development store (similar to a real Shopify store) to add products, test themes (HTML/CSS), and simulate purchases using a test payment gateway. Note: Custom domains and real payment processing aren't available.
Click "Create a development store," leading to:
Provide a store name, password, and store type (choose "Online store"). Click "Create Store."
Development Store Configuration:
After creation, log in using the provided link. Select a product category (e.g., "Electronics & Gadgets"). Add products and customers via the side menu to have data for API interaction. Finally, publish your store by selecting a free theme and clicking "Publish theme" to make it accessible at https://{your-storename}.myshopify.com.
App Creation:
On the Shopify Partner website, navigate to "Apps" and click "Create a new app."
Enter the app name, app URL (e.g., http://localhost/shopify-tester), and redirect URL (e.g., http://localhost/shopify-tester/login). Note the API key and secret displayed on the app dashboard; you'll need them later.
User Authentication:
The OAuth process authenticates users:
- User installs the app (in this tutorial, we bypass the App Store and directly access the install URL).
- The app's install page requests the store name.
- Upon installation, a unique string is generated and stored with the store name.
- The app constructs the Shopify authorization URL and redirects the user.
- Shopify redirects to your specified redirect URL with an access code, HMAC, state, and timestamp.
- The app verifies the request's validity.
- A permanent access token is requested from the Shopify API.
- The access token and other details are saved.
Demo App:
This section details the app's implementation.
Installing Dependencies:
composer require twig/twig guzzlehttp/guzzle nesbot/carbon vlucas/phpdotenv ircmaxell/random-lib
Install Page (install.php):
This page handles the initial app installation request. It connects to a MySQL database (schema in the GitHub repo), generates a nonce, and redirects to the Shopify authorization URL. The install form is in templates/install.html.
Authorization Page (auth.php):
This page verifies the Shopify redirect, calculates the HMAC, and requests the access token from the Shopify API. The token is then stored in the database.
API Requests (products.php):
This page retrieves and displays products using the stored access token. It uses Guzzle to make the API request and Twig to render the templates/products.html template.
Conclusion:
This tutorial provides a foundation for Shopify app development. Future tutorials will explore more complex apps and framework usage.
Frequently Asked Questions (FAQ): (This section is largely unchanged from the original input, as it provides valuable supplementary information.)
What are the prerequisites for developing a Shopify app?
How can I create a Shopify Partner account?
What is a Shopify development store and how do I create one?
How do I use the Shopify API?
How do I submit my app to the Shopify App Store?
How can I monetize my Shopify app?
What are the best practices for Shopify app development?
How can I ensure my app is secure?
How can I improve the performance of my Shopify app?
How can I get support while developing my Shopify app?
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