PHP-FIG accepted a new standard about HTTP clients : PSR-18. This new document will allow projects to remain agnostic to which HTTP client is used underneath.
The goal of this PSR is to allow developers to create libraries decoupled from HTTP client implementations. This will make libraries more reusable as it reduces the number of dependencies and lowers the likelihood of version conflicts.
More information at https://www.php-fig.org/psr/psr-18/
