Bitcoin and PHP with Coinbase's API - Demo App

This article builds upon the previous installment, detailing the creation of a donation application using Coinbase's Bitcoin PHP API. We'll construct a simple application demonstrating real-world Bitcoin transaction handling.

Key Concepts Revisited:

• The Coinbase API simplifies Bitcoin (BTC) transactions via PHP functions like sendMoney() and requestMoney().
• Transaction status is verifiable using $response->transaction->status, and the transaction ID is accessible via $response->transaction->id.
• While the API evolves, the PHP package might lag in wrapper method updates. Direct API interaction using get, post, put, and delete methods is always an option.
• This example creates a donation application for a fictional non-profit.

Sending and Receiving Bitcoins (Recap):

The sendMoney() and requestMoney() methods are straightforward. sendMoney() takes the recipient address and amount as primary parameters. requestMoney() uses the recipient's email address to initiate a payment request via Coinbase. Transaction status and IDs are easily retrieved. Cancellation and resending of requests are also supported.

A Simple Donation Application:

Let's build a four-page application:

1. Welcome Page (index.php): A form to input the donation amount.
2. Payment Page (payment.php): Displays a Coinbase payment button generated using the PHP SDK.
3. Thanks Page (thanks.php): Confirms successful donation.
4. Cancel Page (cancel.php): Handles payment cancellation or errors.

Implementation Details:

The includes/coinbase.inc.php file contains the API key, secret, and button generation logic using $coinbase->createButton(). Error handling and input validation are minimal in this example but crucial in production environments. Remember to configure your Coinbase merchant profile before generating buttons.

Code Snippets (Simplified):

• index.php (excerpt): A simple form to collect the donation amount. (Full code omitted for brevity).
• payment.php (excerpt): Displays the donation amount and the Coinbase payment button. (Full code omitted for brevity).
• includes/coinbase.inc.php (excerpt): Contains API credentials and button generation. (Full code omitted for brevity).
• thanks.php & cancel.php (excerpts): Simple confirmation and error pages respectively. (Full code omitted for brevity).

Conclusion:

This enhanced demonstration showcases the ease of integrating Coinbase's Bitcoin API into a PHP application. While the provided code is simplified, it highlights the core functionality. Remember to implement robust error handling and security measures in a production setting. The complete code is available on Github (link not provided, as it wasn't in the original text).

Frequently Asked Questions (FAQs):

The FAQs section from the original text remains relevant and provides valuable information on getting started, prerequisites, security, error handling, and other aspects of using the Coinbase PHP library. (Full FAQs omitted for brevity, but the original text contains this information).

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