Composer 2.4 comes with a feature that it prompts during a composer require to install packages as require-dev dependencies when certain keywords are present. Development tools and libraries now can make use of this feature to mark themselves, so Composer uses the prompt when suitable.
PHP 8.2 is the latest PHP version which brings readonly classes, DNF types, null, false, and true types, sensitive parameter redaction support, a new random extension, and several new features along with a few deprecations.
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