Integrations

Standard Server – Out of the box integration with any PSR-7 compatible framework (like Slim or Zend Expressive).
Relay Library for graphql-php – Helps construct Relay related schema definitions.
Lighthouse – Laravel based, uses Schema Definition Language
Laravel GraphQL - Laravel wrapper for Facebook's GraphQL
OverblogGraphQLBundle – Bundle for Symfony
WP-GraphQL - GraphQL API for WordPress
Siler - Straightforward way to map GraphQL SDL to resolver callables, also built-in support for Swoole

GraphQL PHP Tools

GraphQLite – Define your complete schema with annotations
GraphQL Doctrine – Define types with Doctrine ORM annotations
DataLoaderPHP – as a ready implementation for deferred resolvers
GraphQL Uploads – A PSR-15 middleware to support file uploads in GraphQL.
GraphQL Batch Processor – Provides a builder interface for defining collection, querying, filtering, and post-processing logic of batched data fetches.
GraphQL Utils – Objective schema definition builders (no need for arrays anymore) and DateTime scalar
PSR 15 compliant middleware for the Standard Server (experimental)

GraphQL Playground – GraphQL IDE for better development workflows (GraphQL Subscriptions, interactive docs & collaboration).
GraphiQL – An in-browser IDE for exploring GraphQL
ChromeiQL or GraphiQL Feen – GraphiQL as Google Chrome extension
Altair GraphQL Client - A beautiful feature-rich GraphQL Client for all platforms