hollodotme/fast-cgi-client

Provides powerful methods to fetch HTTP resources synchronously or asynchronously

PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs

Event-driven, streaming HTTP client and server implementation for ReactPHP.

Guzzle, an extensible PHP HTTP client

A lightweight solution for running code concurrently in PHP

Requests for PHP is a humble HTTP request library. It simplifies how you interact with other sites and takes away all your worries.

PHP Standard Library

Common HTTP Client implementations and tools for HTTPlug

Event-driven, non-blocking I/O with PHP.