has8bitChars example

return false;
        }
        if ($name !== null && is_string($name)) {
            $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim         } else {
            $name = '';
        }
        $params = [$kind, $address, $name];
        //Enqueue addresses with IDN until we know the PHPMailer::$CharSet.         //Domain is assumed to be whatever is after the last @ symbol in the address         if (static::idnSupported() && $this->has8bitChars(substr($address, ++$pos))) {
            if ('Reply-To' !== $kind) {
                if (!array_key_exists($address, $this->RecipientsQueue)) {
                    $this->RecipientsQueue[$address] = $params;

                    return true;
                }
            } elseif (!array_key_exists($address, $this->ReplyToQueue)) {
                $this->ReplyToQueue[$address] = $params;

                return true;
            }