Mostly on wordpress network setups you will face the issue

PHP Warning: Undefined array key "HTTP_HOST" in phar:///usr/local/bin/wp/vendor/wp-cli/config-command/src/Config_Command.php(556) : eval()'d code on line 74

This is the case, since the hostname is not known to wp-cli. But you can fix this issue. If you are not sure of your wordpress network

To fix this issue there are multiple ways to solve and one recommended way.

Recommended

If you have wp-cli running you