PHP发送带有图像附件的电子邮件

Question

我正在尝试创建一个脚本，用于发送从iPhone应用程序中上传的图像，并通过电子邮件发送给我。

我已经能够让脚本给我发送附件的电子邮件。但是，附件始终为0kb。

这里是我的代码：

// Standard email info 


$to = 'example@example.com'; 
$subject = 'Email with an image attached'; 

// This variable will be used when declaring the "boundaries" 
// for the different sections of the email 
$boundary = md5(date('r', time())); 

//Initial Headers 
$headers = "MIME-Version: 1.0\r\n"; // <- the "\r\n" indicate a carriage return and newline, respectively 
$headers .= "From: <example@example.com>\r\n"; 
$headers .= "Content-Type: multipart/mixed; boundary=" . $boundary . "\r\n"; // <- This is 
// saying the there will be more than one (a "mix") of Content Types in this email. 
// The "boundary" value will indicate when each content type will start 

    //First Content Type 
$message = "\r\n\r\n--" . $boundary . "\r\n"; // <- This indicates that I'm going to start 
// declaring headers specific to this section of the email. 
// MAKE SURE there's only ONE(1) "\r\n" between the above boundry and the first header below (Content-Type) 
$message .= "Content-type: text/plain; charset=\"iso-8859-1\"\r\n"; // <- Here I'm saying this content should be plain text 
$message .= "Content-Transfer-Encoding: 7bit\r\n\r\n"; 

// Body of the email for the headers I just declared 
$message .= "Someone filled out the form. See their info below:\r\n"; 
$message .= "Name:"; 

//Second Content Type 
$message .= "\r\n\r\n--" . $boundary . "\r\n"; // <- This idicates that I'm going to start 
// declaring some more headers for the content below 
// MAKE SURE there's only ONE(1) "\r\n" between the above boundry and the first header below (Content-Type) 
$message .= "Content-type: image/jpeg\r\n"; // <- Here I'm saying that this Content Type is for a JPEG image 
$message .= "Content-Transfer-Encoding: base64\r\n"; // <- this is saying that this section's content will be base64 Encoded 
$message .= "Content-Disposition: attachment; filename=\"Image.jpg\"\r\n"; // <- This is saying the content below should be an attachment and gives it a file name 

// The base64_encode below is necessary because this is a file. 
$message .= base64_encode(file_get_contents($_FILES["userfile"]["name"])); 

$message .= "\r\n\r\n--" . $boundary . "--"; // <- This indicates the end of the boundries. Notice the additional "--" after the boundry's value. 

// Send the email using "mail()". 
// Adding the "$mail_sent = " before "mail()" will store TRUE in $mail_sent if the email is sent successfully 
// Adding the "@" sign before "mail()" will disable error display so users 
// won't see the actual error info if it fails, just "Mail failed". 
$mail_sent = @mail($to, $subject, $message, $headers); 

//Check to see if the email was sent successfully ($mail_sent = true). 
//If so, display "Mail Sent" to the screen, else display "Mail Failed". 
echo $mail_sent ? "Mail sent" : "Mail failed"; 

，一切工作正常，除了附件是0KB。

任何帮助表示赞赏。

谢谢。

Answer 1

 // to, from, subject, message body, attachment filename, etc. 
     $to = "to@to.com"; 
     $from = "from@from.com"; 
     $subject = "subject"; 
     $message = "this is the message body"; 
     $filename = "/home/user/file.jpeg"; 
     $fname = "file.jpeg"; 

     $headers = "From: $from"; 
     // boundary 
     $semi_rand = md5(time()); 
     $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x"; 

     // headers for attachment 
     $headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\""; 

     // multipart boundary 
     $message = "This is a multi-part message in MIME format.\n\n" . "--{$mime_boundary}\n" . "Content-Type: text/plain; charset=\"iso-8859-1\"\n" . "Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n"; 
     $message .= "--{$mime_boundary}\n"; 

     // preparing attachments    
      $file = fopen($filename,"rb"); 
      $data = fread($file,filesize($filename)); 
      fclose($file); 
      $data = chunk_split(base64_encode($data)); 
      $message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"".$fname."\"\n" . 
      "Content-Disposition: attachment;\n" . " filename=\"$fname\"\n" . 
      "Content-Transfer-Encoding: base64\n\n" . $data . "\n\n"; 
      $message .= "--{$mime_boundary}--\n"; 


     // send 
     //print $message; 

     $ok = @mail($to, $subject, $message, $headers, "-f " . $from);   

Answer 2

虽然有这样的罐装功能，对于初级程序员来说是多么美妙的练习！

写得很好mti2935。它会让人们真正阅读而不仅仅是剪切和粘贴。如果您使用php发送电子邮件，您应该了解这些基本概念。

可能从掩蔽你真正的代码疏漏：

第23行应该是：

$data = fread($file,filesize($filename)); 

也就是说，$fname应该$filename。

线26应该是：

$message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"".$fname."\"\n" . 

$x都不也不$files[$x]定义。

@Thomas Spade：我想提醒您，您应该始终清理输入内容（电子邮件地址）。

Answer 3

，截止MIME分界线应该在--结束，所以线29应改为：

$message .= "--{$mime_boundary}--\n";