composer require webonyx/graphql-php
If you don't know what GraphQL is, visit this official website by the Facebook engineering team.
There are several ready examples in the examples folder of the distribution with specific README file per example.
Please refer to CONTRIBUTING.md for information on how to contribute.
Here is a link to the old README.md.
Keep in mind that it relates to the version 0.9.x. It may contain outdated information for newer versions (even though we try to preserve backwards compatibility).