=======更新========
问题最终是我在应该使用 Content-Type 时使用了标头 ContentType。
谢谢你们的帮助。
嘭嘭嘭嘭。
=======/更新=======
对于这个令人讨厌的冗长问题，我提前道歉。
我正在尝试通过 PHP 发送带有附件的电子邮件。我以前用一个附件成功地做到了这一点。但是我无法让它与多个附件一起使用，或者现在使用这种方法与单个附件一起使用。那么，我做错了什么？
我了解这些功能还有其他可用的库。但我想知道为什么这个不起作用。
这是生成实际电子邮件的方法：
function gen_mail ()
{
$files = $this->files();
$has_attachments = (bool) $files;
$EOL = "\r\n"; // tried \n, PHP_EOL
$message = $this->message;
$headers = $this->gen_headers();
$headers .= "MIME-Version: 1.0$EOL";
if ($has_attachments) {
$hash = md5(time());
$sep = "=={$hash}==";
$headers .= "ContentType: multipart/mixed; boundary=\"$sep\"$EOL$EOL";
$headers .= "This is a MIME-encoded message.$EOL$EOL";
$headers .= "--$sep$EOL";
}
$headers .= "Content-Type: text/html; charset=\"iso-8859-1\"$EOL";
$headers .= "Content-Disposition: inline$EOL";
$headers .= "Content-Transfer-Encoding: 7bit$EOL$EOL";
$headers .= "$message$EOL$EOL";
if ($has_attachments) { // here go attachments
foreach ($files as $key => $value) {
$filename = is_numeric($key)? basename($value) : $key;
$file = fopen($value, 'rb');
$data = fread($file, filesize($value));
fclose($file);
$content = chunk_split(base64_encode($data));
$headers .= "--$sep$EOL";
$headers .= "Content-Type: application/octet-stream; ";
$headers .= "name=\"$filename\"$EOL";
$headers .= "Content-Transfer-Encoding: base64$EOL";
// tried Content-Disposition, attachment, and every combination
$headers .= "Content-Description: inline; $EOL ";
$headers .= "filename=\"$filename\"$EOL$EOL";
$headers .= "$content$EOL$EOL";
}
$headers .= "--$sep--$EOL$EOL";
}
return $headers;
}
这就是上述函数返回的标头的样子：
From: test@urbido.es
MIME-Version: 1.0
ContentType: multipart/mixed; boundary="==cd42448edf10bca4640bc7d6365e1961=="
This is a MIME-encoded message.
--==cd42448edf10bca4640bc7d6365e1961==
Content-Type: text/html; charset="iso-8859-1"
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
Travis, you are so cool!!!1!
--==cd42448edf10bca4640bc7d6365e1961==
Content-Type: application/octet-stream; name="html.login.php"
Content-Transfer-Encoding: base64
Content-Description: inline;
filename="html.login.php"
PD9waHANCgkNCiRoZWFkZXJfY29uZmlnID0gYXJyYXkoKTsNCiRtc2cgPSAnUmVnaXN0ZXJlZCBP
cGVyYXRvcnMsIGVudGVyIHlvdXIgT3BlcmF0b3IgSUQgYW5kIHBhc3N3b3JkIHRvIGxvZ2luJzsN
CiRtc2dfY2xhc3MgPSAnbm9ybWFsJzsNCmlmICgkbG9nZ2VkX2luKSB7DQoJJGhlYWRlcl9jb25m
aWdbJ2NvbnRyb2xzJ10gPSBhcnJheSAoDQoJCWFycmF5ICgndGV4dCcgPT4gJ1N1Ym1pdCBFbnRy
aWVzJywgJ2hyZWYnID0+ICdlbnRyeScpLA0KCSk7DQoJJG1zZyA9ICdZb3UgYXJlIGxvZ2dlZCBp
bi4gVXNlIHRoZSBhYm92ZSBsaW5rcywgb3IgDQoJCWNsaWNrIDxhIGhyZWY9ImVudHJ5Ij5oZXJl
PC9hPiB0byBiZWdpbiBvciByZXN1bWUgYSBqb2InOw0KCSRtc2dfY2xhc3MgPSAnc3VjY2Vzcyc7
DQp9DQoNCj8+
--==cd42448edf10bca4640bc7d6365e1961==--
我尝试过其他人编写的函数，它们产生看似相同的输出。但是当我用 mail($address, $subject, '', $headers) 发送这些标题时
我在收件箱中收到了这个：
This is a MIME-encoded message.
--==cd42448edf10bca4640bc7d6365e1961==
Content-Type: text/html; charset="iso-8859-1"
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
Travis, you are so cool!!!1!
--==cd42448edf10bca4640bc7d6365e1961==
Content-Type: application/octet-stream; name="html.login.php"
Content-Transfer-Encoding: base64
Content-Description: inline;
filename="html.login.php"
PD9waHANCgkNCiRoZWFkZXJfY29uZmlnID0gYXJyYXkoKTsNCiRtc2cgPSAnUmVnaXN0ZXJlZCBP
cGVyYXRvcnMsIGVudGVyIHlvdXIgT3BlcmF0b3IgSUQgYW5kIHBhc3N3b3JkIHRvIGxvZ2luJzsN
CiRtc2dfY2xhc3MgPSAnbm9ybWFsJzsNCmlmICgkbG9nZ2VkX2luKSB7DQoJJGhlYWRlcl9jb25m
aWdbJ2NvbnRyb2xzJ10gPSBhcnJheSAoDQoJCWFycmF5ICgndGV4dCcgPT4gJ1N1Ym1pdCBFbnRy
aWVzJywgJ2hyZWYnID0+ICdlbnRyeScpLA0KCSk7DQoJJG1zZyA9ICdZb3UgYXJlIGxvZ2dlZCBp
bi4gVXNlIHRoZSBhYm92ZSBsaW5rcywgb3IgDQoJCWNsaWNrIDxhIGhyZWY9ImVudHJ5Ij5oZXJl
PC9hPiB0byBiZWdpbiBvciByZXN1bWUgYSBqb2InOw0KCSRtc2dfY2xhc3MgPSAnc3VjY2Vzcyc7
DQp9DQoNCj8+
--==cd42448edf10bca4640bc7d6365e1961==--