Get fields in Craft CMS 5 with identical settings

MigrationController.php

<?php

// ....

public function actionConsolidateFieldsCandidates()
    {
        $signatures = [];

        foreach (Craft::$app->getFields()->getAllFields() as $field) {
            $signature = [
                'type' => get_class($field),
                'translationMethod' => $field->translationMethod,
                'translationKeyFormat' => $field->translationKeyFormat,
                'searchable' => $field->searchable,
                'settings' => $field->settings,
            ];

            $hash = md5(json_encode($signature));

            $signatures[$hash][] = $field->handle;

        }
        foreach ($signatures as $hash => $handles) {
            if (count($handles) > 1) {
                Console::output( implode(', ', $handles));
            }
        }
    }