如何在php中定义常量并从所有文件访问它而不包括常量文件（任何类似于.Net中的AppSettings）

I want define some constants and access those from any file without including any file in php.

in the other word i search for any equivalent of Web.Config->AppSettings in C#

You should define them in a file called constants.php and then change your php.ini settings so that this file is always loaded, before anything else:

auto_prepend_file = /var/www/website/constants.php