PHP Warning when running outside of HTTP context

I run WP cron with a Linux crontab cron job:

/usr/bin/php /var/www/redacted.site.com/public/wordpress/wp-cron.php

Since this doesn’t run within the context of a HTTP request, some of the PHP $_SERVER variables will not be set, resulting in a warning in syslog

PHP Warning: Undefined array key "HTTP_HOST" in /var/www/redacted.site.com/public/wordpress/wp-content/plugins/embed-soundcloud-block/index.php on line 17

It looks as though this check is used for checking localhost to set version of the plugin in the dev/testing environment. Could this be adapted from:

  16   │ // Constant
  17   │ if ('localhost' === $_SERVER['HTTP_HOST']) {
  18   │     $plugin_version = time();
  19   │ } else {
  20   │     $plugin_version = '1.0.5';
  21   │
  22   │ }
  23   │ define('SCB_PLUGIN_VERSION', $plugin_version);

To something like:

  16   │ // Constant
  17   │ if (isset($_SERVER['HTTP_HOST']) && 'localhost' === $_SERVER['HTTP_HOST']) {
  18   │     $plugin_version = time();
  19   │ } else {
  20   │     $plugin_version = '1.0.5';
  21   │
  22   │ }
  23   │ define('SCB_PLUGIN_VERSION', $plugin_version);