php – 邮件邮件附件

$mg_api = 'key-3ax6xnjp29jd6fds4gc373sgvjxteol0';
$mg_version = 'api.mailgun.net/v2/';
$mg_domain = "samples.mailgun.org";
$mg_from_email = "info@samples.com";
$mg_reply_to_email = "info@samples.org";

$mg_message_url = "https://".$mg_version.$mg_domain."/messages";


$ch = curl_init();
curl_setopt($ch,CURLOPT_HTTPAUTH,CURLAUTH_BASIC);

curl_setopt ($ch,CURLOPT_MAXREDIRS,3);
curl_setopt ($ch,CURLOPT_FOLLOWLOCATION,false);
curl_setopt ($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt ($ch,CURLOPT_VERBOSE,0);
curl_setopt ($ch,CURLOPT_HEADER,CURLOPT_CONNECTTIMEOUT,10);
curl_setopt ($ch,CURLOPT_SSL_VERIFYPEER,CURLOPT_SSL_VERIFYHOST,0);

curl_setopt($ch,CURLOPT_USERPWD,'api:' . $mg_api);
curl_setopt($ch,1);

curl_setopt($ch,CURLOPT_POST,true); 
//curl_setopt($curl,CURLOPT_POSTFIELDS,$params); 
curl_setopt($ch,false); 

//curl_setopt($ch,CURLOPT_CUSTOMREQUEST,'POST');
curl_setopt($ch,CURLOPT_URL,$mg_message_url);
curl_setopt($ch,array(  'from'      => 'aaaa <' . 'aaa@aaa.com' . '>','to'        => 'test.client91@gmail.com','h:Reply-To'=>  ' <' . $mg_reply_to_email . '>','subject'   => 'aaaaa'.time(),'html'      => 'aaaaaa','attachment'[1] => 'aaa.rar'
            ));
$result = curl_exec($ch);
curl_close($ch);
$res = json_decode($result,TRUE);
print_r($res);

(我用过我的邮件设置)

我收到的电子邮件没有附件.如果我使用URL路径,它会显示URL而不是附件.