libphonenumber\Matcher::doMatch PHP Метод

    protected function doMatch($type = 'find')
    {
        $final_pattern = '(?:' . $this->pattern . ')';
        switch ($type) {
            case 'matches':
                $final_pattern = '^' . $final_pattern . '$';
                break;
            case 'lookingAt':
                $final_pattern = '^' . $final_pattern;
                break;
            case 'find':
            default:
                // no changes
                break;
        }
        $final_pattern = '/' . $final_pattern . '/x';
        return preg_match($final_pattern, $this->subject, $this->groups, PREG_OFFSET_CAPTURE) == 1 ? true : false;
    }