How to turn off Warning and deprecation errors in Drupal

I had some difficulty with this, because my Drupal installs are in-between php versions. I'm running PHP 8.1, but a lot of the modules that I use were written for PHP 7, and haven't been ported.

Anyway, adding the following line to your sites/default/settings.php in production has worked for me:

$config['system.logging']['error_level'] = 'none';
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