docker-php-fpm/php_modules/psr/README.md

psr

This PHP extension provides the interfaces from the PSR standards as established by the PHP-FIG group. You can use interfaces provided by this extension in another extension easily - see this example.

Platform	Url
GitHub	https://github.com/jbboehr/php-psr
Pecl	https://www.php.net/manual/en/book.pspell.php