FILTER_SANITIZE_STRING Deprecated as of PHP 8.1.0

[shazahm1]

As the subject states, FILTER_SANITIZE_STRING has been deprecated, causing PHP notices.

• plugin-groups/classes/class-bulk-actions.php

  Line 68 in 13575fe

  $selected_group = filter_input( INPUT_POST, 'group_id', FILTER_SANITIZE_STRING );

• plugin-groups/classes/class-bulk-actions.php

  Line 71 in 13575fe

  $new_group_name = filter_input( INPUT_POST, 'new_group_name', FILTER_SANITIZE_STRING );

• plugin-groups/classes/class-plugin-groups.php

  Line 322 in 46336da

  $selected_group = filter_input( INPUT_GET, self::$slug, FILTER_SANITIZE_STRING );

• plugin-groups/classes/class-plugin-groups.php

  Line 799 in 46336da

  $page = filter_input( INPUT_GET, 'page', FILTER_SANITIZE_STRING );

They can be silenced like so: @FILTER_SANITIZE_STRING

Or sanitize with an appropriate replacement.