wp_update_https_url

Providing an empty string is not allowed and will result in the default URL being used. Furthermore the page the URL links to should preferably be localized in the site language.

wp_should_replace_insecure_home_url

If a WordPress site had its URL changed from HTTP to HTTPS, by default this will return true. This filter can be used to disable that behavior, e.g. after having replaced URLs manually in the database.

pre_wp_mail

Returning a non-null value will short-circuit wp_mail(), returning that value instead. A boolean return value should be used to indicate whether the email was successfully sent.

{$action}_overrides

The dynamic portion of the hook name, $action, refers to the post action. Possible filter names include:

  • wp_handle_sideload_overrides
  • wp_handle_upload_overrides