php -S 0.0.0.0 9999 Unsuccessful access to static page

windows environment
cmd php -S 0.0.0.0: 9999
php has configured the environment variable
The webpage with the URL http 0.0.0.0 9999 may be temporarily unavailable or it may have been permanently moved to a new URL

Reply content:

windows environment
cmd php -S 0.0.0.0: 9999
php has configured the environment variable
The webpage with the URL http 0.0.0.0 9999 may be temporarily unavailable or it may have been permanently moved to a new URL

0.0.0.0 is not a valid IP, it just means listening on port 9999, no matter which IP it comes from.

Please use localhost:9999 to visit