我在php页面上使用以下代码发送带有附件的电子邮件：
//define the receiver of the email
$to = 'myemail@domain.com';
//define the subject of the email
$subject = 'Test email with attachment';
//create a boundary string. It must be unique
//so we use the MD5 algorithm to generate a random hash
$random_hash = md5(date('r', time()));
//define the headers we want passed. Note that they are separated with 'r'n
$headers = "From: webmaster@example.com'r'nReply-To: webmaster@example.com";
//add boundary string and mime type specification
$headers .= "'r'nContent-Type: multipart/mixed; boundary='"PHP-mixed-".$random_hash."'"";
//read the atachment file contents into a string,
//encode it with MIME base64,
//and split it into smaller chunks
$attachment = chunk_split(base64_encode(file_get_contents($_FILES['curriculum_vitae']['tmp_name'])));
//define the body of the message.
ob_start(); //Turn on output buffering
?>
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: multipart/alternative; boundary="PHP-alt-<?php echo $random_hash; ?>"
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Hello World!!!
This is simple text email message.
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
<h2>Hello World!</h2>
<p>This is something with <b>HTML</b> formatting.</p>
--PHP-alt-<?php echo $random_hash; ?>--
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: application/zip; name="attachment.zip"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
<?php echo $attachment; ?>
--PHP-mixed-<?php echo $random_hash; ?>--
<?php
//copy current buffer contents into $message variable and delete current output buffer
$message = ob_get_clean();
//send the email
$mail_sent = @mail( $to, $subject, $message, $headers );
//if the message is sent successfully print "Mail sent". Otherwise print "Mail failed"
echo $mail_sent ? "Mail sent" : "Mail failed";
然而，我遇到了一些问题和麻烦，如果你们能帮助我，我将不胜感激。
首先，如果我将附件的输入留空，我会得到一个错误"Warning:file_get_contents（）[function.file-get-contents]：文件名在…中不能为空"
我希望附件是可选的，所以如果我留空，我想忽略这个错误，这可能吗？
其次，当我发送了一封带有附件的电子邮件并从电子邮件中下载时，我无法打开发送的文件。我得到了一个.zip，当尝试打开时，会收到以下消息："归档文件的格式未知或已损坏"。
你知道问题出在哪里吗？
谢谢！
由于脚本运行完美，您需要更改上传的curriculum_vitae文件名称中的attachment.zip，否则无论上传什么文件，您都只能获得attachment.zip：
所以改变：
Content-Type: application/zip; name="attachment.zip"
带有
Content-Type: application/zip; name="<?php echo $_FILES['curriculum_vitae']['name']; ?>"
如果未张贴，请使用此发送附件
$to = 'myemail@domain.com';
$subject = 'Test email with attachment';
$random_hash = md5(date('r', time()));
$headers = "From: webmaster@example.com'r'nReply-To: webmaster@example.com";
$headers .= "'r'nContent-Type: multipart/mixed; boundary='"PHP-mixed-".$random_hash."'"";
if(isset($_FILES['curriculum_vitae']['name']) && $_FILES['curriculum_vitae']['name'] != ''){ $attachment = chunk_split(base64_encode(file_get_contents($_FILES['curriculum_vitae']['tmp_name']))); }
ob_start();
?>
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: multipart/alternative; boundary="PHP-alt-<?php echo $random_hash; ?>"
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Hello World!!!
This is simple text email message.
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
<h2>Hello World!</h2>
<p>This is something with <b>HTML</b> formatting.</p>
--PHP-alt-<?php echo $random_hash; ?>--
<?php if(isset($_FILES['curriculum_vitae']['name']) && $_FILES['curriculum_vitae']['name'] != ''){ ?>--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: application/zip; name="<?php echo $_FILES['curriculum_vitae']['name']; ?>"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
<?php echo $attachment; ?>
--PHP-mixed-<?php echo $random_hash; ?>--
<?php } ?>
<?php
$message = ob_get_clean();
$mail_sent = @mail( $to, $subject, $message, $headers );
echo $mail_sent ? "Mail sent" : "Mail failed";
这个简单的PHP脚本或电子邮件函数能够发送包含单个附加文件的纯文本邮件。文件必须先上传，否则您的网络服务器上应该有一个现有文件。你可以使用这个
功能：
<?php
function mail_attachment($filename, $path, $mailto, $from_mail, $from_name, $replyto, $subject, $message) {
$file = $path.$filename;
$file_size = filesize($file);
$handle = fopen($file, "r");
$content = fread($handle, $file_size);
fclose($handle);
$content = chunk_split(base64_encode($content));
$uid = md5(uniqid(time()));
$name = basename($file);
$header = "From: ".$from_name." <".$from_mail.">'r'n";
$header .= "Reply-To: ".$replyto."'r'n";
$header .= "MIME-Version: 1.0'r'n";
$header .= "Content-Type: multipart/mixed; boundary='"".$uid."'"'r'n'r'n";
$header .= "This is a multi-part message in MIME format.'r'n";
$header .= "--".$uid."'r'n";
$header .= "Content-type:text/plain; charset=iso-8859-1'r'n";
$header .= "Content-Transfer-Encoding: 7bit'r'n'r'n";
$header .= $message."'r'n'r'n";
$header .= "--".$uid."'r'n";
$header .= "Content-Type: application/octet-stream; name='"".$filename."'"'r'n"; // use different content types here
$header .= "Content-Transfer-Encoding: base64'r'n";
$header .= "Content-Disposition: attachment; filename='"".$filename."'"'r'n'r'n";
$header .= $content."'r'n'r'n";
$header .= "--".$uid."--";
if (mail($mailto, $subject, "", $header)) {
echo "mail send ... OK"; // or use booleans here
} else {
echo "mail send ... ERROR!";
}
}
?>
代码：
<?php
$my_file = "somefile.zip";
$my_path = $_SERVER['DOCUMENT_ROOT']."/your_path_here/";
$my_name = "Olaf Lederer";
$my_mail = "my@mail.com";
$my_replyto = "my_reply_to@mail.net";
$my_subject = "This is a mail with attachment.";
$my_message = "Hallo,'r'ndo you like this script? I hope it will help.'r'n'r'ngr. Olaf";
mail_attachment($my_file, $my_path, "recipient@mail.org", $my_mail, $my_name, $my_replyto, $my_subject, $my_message);
?>