Extended HTTP Support
This HTTP extension aims to provide a convenient and powerful set of functionality for one of PHPs major applications. It eases handling of HTTP urls, dates, redirects, headers and messages, provides means for negotiation of clients preferred language and charset, as well as a convenient way to send any arbitrary data with caching and resuming capabilities. It provides powerful request functionality, if built with CURL support. Parallel requests are available for PHP 5 and greater.
To install php-http2, paste this in macOS terminal after installing MacPorts
sudo port install php-http2