If your web applications success depends on how quickly and easily users can make transactions then paypal is a solution you cant afford to overlook. This book helps you determine which paypal option is best for your situation and provides stepbystep instructions for implementing the payment method you choose whether youre accepting money via the web or mobile devices for products and services donations or anything else. You will find sample code written primarily in php and objectivec as well as use cases for executing options with paypals api. By the end of this book you will 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 paypals 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 androidbased mobile app with the new mobile express checkout method.Test your paypal implementation with the sandbox.