$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
// headers for attachment
$headers = "From: $from";
$headers .= "nMIME-Version: 1.0n" . "Content-Type: multipart/mixed;n" . " boundary="{$mime_boundary}"";
// multipart boundary
$message = "This is a multi-part message in MIME format.nn" . "--{$mime_boundary}n" . "Content-Type: text/plain; charset="iso-8859-1"n" . "Content-Transfer-Encoding: 7bitnn" . strip_tags($content) . "nn";
$message .= "--{$mime_boundary}n";
// preparing attachments
for($x=0;$x<2;$x++)
{
$data = chunk_split($att[$x]);
$message .= "Content-Type: {"application/pdf"};n" . " name="$name[$x]"n" .
"Content-Disposition: attachment;n" . " filename="$name[$x]"n" .
"Content-Transfer-Encoding: base64nn" . $data . "nn";
$message .= "--{$mime_boundary}n";
IMO 的解决方案不是修复您的代码。
我的建议是使用已经可用于PHP的众多非常好的电子邮件库之一,例如SwiftMailer或PHPMailer。由于各种电子邮件客户端/站点的所有细微差别,对电子邮件进行编码是一项非常棘手的任务,并且这些库已经对几乎所有库进行了非常彻底的测试。现有库还包括有助于降低电子邮件在目的地被标记为垃圾邮件的可能性的功能。