php – 如何使用mailgun发送带附件的批量/群发电子邮件？

这是我的代码：

# Instantiate the client.
    $mgClient = new Mailgun('key-****');
    $domain = "foo.bar.com";

    # Make the call to the client.
    $result = $mgClient->sendMessage($domain,array(
        'from'    => 'gido@foo.baar.com','to'      => array('user1@gmail.com','user2@gmail.com'),'subject' => 'Hi %recipient.first%','text'    => 'Hey there,Just Testing','recipient-variables' => '{"user1@gmail.com": {"first":"User1","id":1,"file" : "/path/to/file1"},"user2@gmail.com": {"first":"User2","id": 2,"file" : "/path/to/file2"}}'
    ),array(
        'attachment' => array('%recipient.file%')
    ));

上面的代码不起作用.附件数组无法使用收件人变量.用/ path / to / file替换％recipient.image％可以正常工作.