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希望我可以得到一些帮助，因为这是驱使我坚果。PHP多部分文本/ HTML显示空白
我已经尝试过各种脚本来做到这一点，但我登陆的是这个。这张照片有什么问题？我收到一封电子邮件，但它完全空白。但是，电子邮件的来源包含内容。
EMAIL CODE
//define receiver and subject
$to = '[email protected]';
$subject = 'Test email';
//create boundary
$random_hash = md5(date('r', time()));
//define the headers
$headers = "From: [email protected]\r\nReply-To: [email protected]";
$headers .= "\r\nContent-Type: multipart/alternative; boundary=\"$random_hash\"";
//define the body of the message.
$message = "--$random_hash\n" .
"Content-Type: text/plain; charset=\"iso-8859-1\"\n" .
"Content-Transfer-Encoding: 7bit\n\r" .
"Hello\n\rWorld!!!\n\r" .
"--$random_hash\n" .
"Content-Type: text/html; charset=\"iso-8859-1\"\n" .
"Content-Transfer-Encoding: 7bit\n\r" .
"<h2>Hello World!</h2>\n\r" .
"--$random_hash--";
//send the email
$mail_sent = mail($to, $subject, $message, $headers);
EMAIL SOURCE（收）
Received: (qmail 26359 invoked by uid 48); 21 Mar 2013 10:09:01 -0700
Date: 21 Mar 2013 10:09:01 -0700
Message-ID: <[email protected]>
To: [email protected]
Subject: Test email
X-PHP-Originating-Script: 10001:plug-send-direct.php
From: [email protected]
Reply-To: [email protected]
Content-Type: multipart/alternative; boundary="f41fbfe6fda45eb7f5a2724ba135d292"
--f41fbfe6fda45eb7f5a2724ba135d292
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Hello
World!!!
--f41fbfe6fda45eb7f5a2724ba135d292
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
<h2>Hello World!</h2>
--f41fbfe6fda45eb7f5a2724ba135d292--
是怎么回事？