Jyxo\Mail\Sender::attachAll PHP 메소드

    private function attachAll() : string
    {
        $mime = [];
        foreach ($this->email->attachments as $attachment) {
            $encoding = !empty($attachment->encoding) ? $attachment->encoding : Encoding::BASE64;
            $name = $this->changeCharset($this->clearHeaderValue($attachment->name));
            $mime[] = '--' . $this->boundary[1] . self::LINE_END;
            $mime[] = 'Content-Type: ' . $this->clearHeaderValue($attachment->mimeType) . ';' . self::LINE_END;
            $mime[] = ' name="' . $this->encodeHeader($name) . '"' . self::LINE_END;
            $mime[] = 'Content-Transfer-Encoding: ' . $encoding . self::LINE_END;
            if ($attachment->isInline()) {
                $mime[] = 'Content-ID: <' . $this->clearHeaderValue($attachment->cid) . '>' . self::LINE_END;
            }
            $mime[] = 'Content-Disposition: ' . $attachment->disposition . ';' . self::LINE_END;
            $mime[] = ' filename="' . $this->encodeHeader($name) . '"' . self::LINE_END . self::LINE_END;
            // Just fix line endings in case of encoded attachments, encode otherwise
            $mime[] = !empty($attachment->encoding) ? \Jyxo\StringUtil::fixLineEnding($attachment->content, self::LINE_END) : $this->encodeString($attachment->content, $encoding);
            $mime[] = self::LINE_END . self::LINE_END;
        }
        $mime[] = '--' . $this->boundary[1] . '--' . self::LINE_END;
        return implode('', $mime);
    }