The Square PHP library supports Square APIs in a language-idiomatic way that reduces complexity without sacrificing API functionality.
Latest SDK Version: 39.1.0.20241218
Each SDK version is tied to a specific Square API version. As features are added, Square releases a new Square API version and a new SDK version. To use new features, you must update the SDK version in your application. Review the release notes to learn about changes in each API version.
An increase in the SDK major version number indicates a breaking change. You should always test your application before deploying a change to production.
- Follow along with the Quickstart guide to set up and test the Square PHP SDK in your own project.
- Download the Square PHP SDK Quickstart sample app and follow the instructions in the README.
- Download the PHP OAuth sample app to view a basic implementation of the Square OAuth flow.