Grav\Plugin\Admin\AdminBaseController::filterAcceptedFiles PHP Method

    protected function filterAcceptedFiles($file, $settings)
    {
        $valid = false;
        foreach ((array) $settings['accept'] as $type) {
            $find = str_replace('*', '.*', $type);
            $valid |= preg_match('#' . $find . '$#', $file);
        }
        return $valid;
    }