PHP7 is going EOL. Drupal 7 is not, so Drupal 7 should run on PHP8 at some point. However, emfield is not entirely happy and throws deprecation warnings:
Deprecated: Required parameter $form_state follows optional parameter $input in /srv/www/html/sites/all/modules/contrib/emfield/emfield.module on line 96
Install emfield on a drupal 7 site running on PHP8.
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