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内容説明 If your web application’s success depends on how quickly and easily users can make transactions， then PayPal is a solution you can’t afford to overlook. This book helps you determine which PayPal option is best for your situation， and provides step-by-step instructions for implementing the payment method you choose-whether you’re accepting money via the Web or mobile devices for products and services， donations， or anything else. You’ll find sample code written primarily in PHP and Objective-C， as well as use cases for executing options with PayPal’s API. By the end of this book， you’ll have a clear understanding of PayPal and how you can get the most out of its powerful features， no matter how much API programming experience you have. * Learn how to work with the PayPal API， and choose the right integration method for your project * Explore PayPal’s Express Checkout option， including its unique workflow and four methods of operation * Examine the Website Payment Pro method-with a focus on direct payments * Consider Adaptive Payments and learn how to set permission levels for their use * Use PayPal in your iOS or Android-based mobile app with the new Mobile Express Checkout method * Test your PayPal implementation with the sandbox