Question

我正在使用mail()功能来测试向自己发送带有图像文件附件的电子邮件。脚本的问题在于，当我查看电子邮件时，我会看到一个长长的随机数字，字母和符号，其中应该是图像。

请不要推荐PHPmailer或手动在邮件正文中添加图片标记。

我正在使用的主要PHP文件：

<?

 include('init.php'); 

if (isset($_POST['name'], $_FILES['file'])){

    $body = <<<BODY
    From: {$_POST['name']}

    Details: 
        Name:   {$_FILES['file']['name']}
        Size:   {$_FILES['file']['size']}
        Type:   {$_FILES['file']['type']}

BODY;

mail_file('receiver@email.com','test@php.com','a file upload',$body,$_FILES['file']);   
}

?>

<form action="" method="POST" enctype="multipart/form-data">
   <input type="text" name="name" id="name">
   <input type="file" name="file" id="file">
   <input type="submit" value="Email File">
</form>

的init.php：

<?

$path = dirname(__FILE__);
include("{$path}/mail.php");

?>

mail.php：

<? 

function mail_file($to, $from, $subject, $body, $file){
    $boundary = md5(rand());

    $headers = array(
        'MIME-Version: 1.0',
        "Content-Type: multipart/mixed; boundary=\"{$boundary}\"",
        "From: {$from}"
    );

    $message = array(
        "--{$boundary}",
        'Content-Type: text/html',
        'Content-Transfer-Encoding: 7bit',
        '',
        chunk_split($body),
        "--{$boundary}",
        "Content-Type: {$file['type']}; name=\"{$file['name']}\"",
        "Content-Disposition: attachment; name=\"{$file['name']}\"",
        "Content-Transfer-Encoding: base64",
        '',
        chunk_split(base64_encode(file_get_contents($file['tmp_name']))),
        "--{$boundary}--"
    );

    mail($to, $subject, implode('\r\n', $message), implode('\r\n', $headers));
}
?>

发送电子邮件的示例：

--4f8b4f63eb5fb4f1c3cde903c7e5b306\r\nContent-Type: text/html\r\nContent-Transfer-Encoding: 7bit\r\n\r\n    From: asas

Details: 
Name: 728x90-Brink-Banner-V2.jpg
Size:   41583

Type:   image/jpeg

\r\n--4f8b4f63eb5fb4f1c3cde903c7e5b306\r\nContent-Type: image/jpeg; name="728x90-Brink-Banner-V2.jpg"\r\nContent-Disposition: attachment; name="728x90-Brink-Banner-V2.jpg"\r\nContent-Transfer-Encoding: base64\r\n\r\n/9j/4AAQSkZJRgABAgAAZABkAAD/7AARRHVja3kAAQAEAAAAUAAA/+4ADkFkb2JlAGTAAAAAAf/b
AIQAAgICAgICAgICAgMCAgIDBAMCAgMEBQQEBAQEBQYFBQUFBQUGBgcHCAcHBgkJCgoJCQwMDAwM
DAwMDAwMDAwMDAEDAwMFBAUJBgYJDQsJCw0PDg4ODg8PDAwMDAwPDwwMDAwMDA8MDAwMDAwMDAwM
DAwMDAwMDAwMDAwMDAwMDAwM/8AAEQgAWgLYAwERAAIRAQMRAf/EAOgAAAAGAwEAAAAAAAAAAAAA
AAMEBQYHCAECCQABAAAHAQEBAAAAAAAAAAAAAAABAgMEBQYHCAkQAAEDAgUBBgMDBAsHDA0NAQEC



...


L81/7CT7TfOuj+7T/wCxbf6cmeeXwouVG4P5we/F/E/yvzHTHMh6q9MNzUc7m/T5X4f4h6fP+6uF
jIJbcyh7Z0b6/h/d6fbhYSHp7D+cIXk/RYHy/RU9P+y/j6sIk9VBmYV1+H+sf9B6Dz+b7cZufPat
RB6oyV2LP+B/6NfhD8X8X7Ph34OPJMy+so95T/RGP/NzzD+bfxuuFyeoozf1ozUXWfoz+n/jJ/Rv
P9n8XvxTvzWktcx8eSvxxR+Gn9P6p83k7Ov72JFl4VE1T1tngUtb2/mmd+H+iu/jfyD1xZyZKqhz
VHdz/wA4H9F/Aa6/h/oKPxP+y+GKmX4eNXtuv//Z
\r\n--4f8b4f63eb5fb4f1c3cde903c7e5b306--

Answer 1

问题出在这里：

mail($to, $subject, implode('\r\n', $message), implode('\r\n', $headers));

您使用了单引号，新行被视为4字符串\r\n，将其更改为：

mail($to, $subject, implode("\r\n", $message), implode("\r\n", $headers));

电子邮件上的图像文件附件未通过PHP正确发送

1 个答案: