Requests for PHP is a humble HTTP request library. It simplifies how you interact with other sites and takes away all your worries.
Log HTTP requests, headers and session data in Laravel
A Psr7-ish, Guzzle-ish, modern-ish set of request/response classes for WordPress
Mock HTTP requests on the server side in your PHP unit tests
The sabre/http library provides utilities for dealing with http requests and responses.
Log HTTP requests in Laravel applications
HTTPlug, the HTTP client abstraction for PHP
Common HTTP Client implementations and tools for HTTPlug
Event-driven, streaming HTTP client and server implementation for ReactPHP.