magento2 自定义发送多个附件 邮件

要在Magento 2中发送多个附件的电子邮件，您需要对`Magento\Framework\Mail\Template\TransportBuilder`类进行扩展。

下面是一个示例代码，它可以让您在Magento 2中发送多个附件的电子邮件：

1. 创建 `Vendor\Module\Model\Mail\Template\TransportBuilder.php` 文件并添加以下代码：

<?php

namespace Vendor\Module\Model\Mail\Template;

use Magento\Framework\App\Filesystem\DirectoryList;
use Magento\Framework\Exception\MailException;
use Magento\Framework\Mail\Template\TransportBuilder as MagentoTransportBuilder;
use Magento\Framework\Mail\TransportInterfaceFactory;
use Magento\Framework\Translate\Inline\StateInterface;
use Magento\Store\Model\StoreManagerInterface;

class TransportBuilder extends MagentoTransportBuilder
{
    /**
     * @var array
     */
    protected $attachments = [];

    /**
     * @param array $attachments
     * @return $this
     */
    public function addMultipleAttachment($attachments = [])
    {
        foreach ($attachments as $attachment) {
            if (file_exists($attachment['path'])) {
                $this->attachments[] = [
                    'type' => $attachment['type'],
                    'name' => $attachment['name'],
                    'path' => $attachment['path']
                ];
            }
        }

        return $this;
    }

    /**
     * @param null|string|array $to
     * @param array $templateVars
     * @param null|string $templateOptions
     * @param null|string $transportOptions
     *
     * @throws MailException
     *
     * @return TransportInterfaceFactory
     */
    public function getTransport(
        $to = null,
        array $templateVars = [],
        $templateOptions = null,
        $transportOptions = null
    ) {
        if (!empty($this->attachments)) {
            foreach ($this->attachments as $attachment) {
                $this->message->createAttachment(
                    file_get_contents($attachment['path']),
                    $attachment['type'],
                    \Zend_Mime::DISPOSITION_ATTACHMENT,
                    \Zend_Mime::ENCODING_BASE64,
                    $attachment['name']
                );
            }
        }

        return parent::getTransport($to, $templateVars, $templateOptions, $transportOptions);
    }
}

2. 创建 `Vendor_Module` 模块的 `di.xml` 文件并添加以下代码：

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Framework\Mail\Template\TransportBuilder" type="Vendor\Module\Model\Mail\Template\TransportBuilder" />
</config>

3. 在您的模块中使用以下代码发送多个附件的电子邮件：

<?php

namespace Vendor\Module\Controller\Index;

use Magento\Framework\App\Action\Action;
use Magento\Framework\App\Action\Context;
use Magento\Framework\Mail\Template\TransportBuilder;
use Magento\Framework\Translate\Inline\StateInterface;
use Magento\Store\Model\StoreManagerInterface;

class SendEmail extends Action
{
    /**
     * @var TransportBuilder
     */
    protected $transportBuilder;

    /**
     * @var StateInterface
     */
    protected $inlineTranslation;

    /**
     * @var StoreManagerInterface
     */
    protected $storeManager;

    /**
     * @param Context $context
     * @param TransportBuilder $transportBuilder
     * @param StateInterface $inlineTranslation
     * @param StoreManagerInterface $storeManager
     */
    public function __construct(
        Context $context,
        TransportBuilder $transportBuilder,
        StateInterface $inlineTranslation,
        StoreManagerInterface $storeManager
    ) {
        $this->transportBuilder = $transportBuilder;
        $this->inlineTranslation = $inlineTranslation;
        $this->storeManager = $storeManager;
        parent::__construct($context);
    }

    /**
     * @return void
     */
    public function execute()
    {
        $attachmentOne = [
            'name' => 'Attachment One',
            'path' => 'path/to/attachment/one.pdf',
            'type' => 'application/pdf'
        ];

        $attachmentTwo = [
            'name' => 'Attachment Two',
            'path' => 'path/to/attachment/two.pdf',
            'type' => 'application/pdf'
        ];

        try {
            $this->inlineTranslation->suspend();

            $this->transportBuilder->setTemplateIdentifier('your_email_template_id')
                ->setTemplateOptions([
                    'area' => 'frontend',
                    'store' => $this->storeManager->getStore()->getId()
                ])
                ->setTemplateVars([])
                ->setFrom([
                    'email' => 'sender@example.com',
                    'name' => 'Sender Name'
                ])
                ->addTo('recipient@example.com', 'Recipient Name')
                ->addMultipleAttachment([$attachmentOne, $attachmentTwo])
                ->getTransport()
                ->sendMessage();

            $this->inlineTranslation->resume();

            $this->messageManager->addSuccess(__('Your email was sent successfully.'));
        } catch (\Exception $e) {
            $this->inlineTranslation->resume();
            $this->messageManager->addError(__('There was an error sending your email. Please try again later.'));
        }

        return $this->_redirect('*/*/index');
    }
}

以上代码将会发送带有两个附件的电子邮件。您可以根据自己的需要更改附件的数量和详细信息。