PHP is developed and maintained by a global community of contributors.
The PHP Foundation helps fund this work. If PHP is part of your business or projects, consider sponsoring the Foundation.
PHP 提供了预定义变量，这些变量表述为外部变量、内置环境变量以及有关执行环境的其他信息，例如在 CLI 环境中传递给脚本的参数的数量和值。
