多输入附件 PHP

Question

我正在尝试处理需要多个文件输入（在表单的不同部分）的表单，每个文件可能有多个附件。我已经将每个输入都设置成这样 w/ 相同的名称（附加），据我所知，$_FILES['attach'] 将获取所有文件，对吗？

 <input type="file" class="file" name="attach[]" title="" dropzone="copy" multiple="multiple" required></input>

我从多个来源拼凑了这个php，请你看看这个。它没有发送，所以显然我在某处犯了一些错误。

(other variables not shown, but sanitized as well)
$attachments = $_FILES['attach'];
// email body
$mes_body = "<html><head></head><body>";
// $mes_body .= "<img src='http://www.domain.com/marketing/image.png' alt='Image' /><br /><br />"; (optional header image)
// Sanitize unknown input data
function sanitize(text) {
  $san =  filter_var(text, FILTER_SANITIZE_STRING);
  return $san;
}
$mes_body .= "<br /><br />";  
foreach ($_POST as $key => $value) { //define & insert unknown inputs into message body
  if ($key != 'From' && $key != 'Subject' && $key != 'Filecheck') {
    $mes_body .= sanitize($key) . ': ' . sanitize($value) . '<br />';
  }
}
$mes_body .= "</body></html>";
// multipart email
$boundary = md5("text_for_hash");
if ($filecheck == 1) { // multipart email w/ attachment(s) & $filecheck=1 means files present
    $headers = "MIME-Version: 1.0\r\n"; 
    $headers .= "From: " . $from_email . "\r\n"; 
    $headers .= "Reply-To: " . $from_email . "" . "\r\n";
    $headers .= "Content-Type: multipart/mixed; boundary = $boundary\r\n\r\n";
    // message text
    $body = "--$boundary\r\n";
    $body .= "Content-Type: text/html; charset=\"ISO-8859-1\"\r\n";
    $body .= "Content-Transfer-Encoding: 8bit\r\n";
    $body .= $mes_body;
    $body .= "boundary = $boundary\r\n";
    // attachment(s)
    foreach ($attachments as $attachment) {
      if ($attachment['size']) {
        $body .= "\r\n" . $boundary;
        $body .= "Content-Type: " . $attachment['type'] . "; name=\"". $attachment['filename'] . "\"\r\n";
        $body .= "Content-Transfer-Encoding: base64\r\n\r\n";
        $body .= $attachment['content'];
      }  
    }
    $body .= "boundary = $boundary\r\n";
    $message_body = $mes_body;
}
else { // plain text email
  $headers = "From: " . $from_email . "\r\n" . "Reply-To: " . $from_email . "\r\n" . "Content-type: text/html" . "\r\n" . "X-Mailer: PHP/" . phpversion();
  $message_body = $mes_body;
}
$send_mail = mail($to_email, $subject, $message_body, $headers);

更新：专注于附件部分。我正在使用 FormData，在附加到 FormData 之前，典型的 key/value 控制台输出可能如下所示：

Files1 和 Files2 是密钥，我也需要将它们放在电子邮件中。例如：
Files1：（附上与 Files1 关联的所有文件）
Files2：（附上与 Files2 相关的所有文件）
注意：我不会提前知道键的名称，因为它们是用户定义的。

有人在附件部分建议这样做，因为它已经是 FormData:

// attachment(s)
foreach ($_FILES as $attachment) {
      $name = $attachment["tmp_name"];
      if ($attachment["size"]) {
        $body .= "--$boundary\r\n";
        $body .= "Content-Type: " . $attachment["type"] . "; name=\"" . $name . "\"; Content-Disposition: attachment" . "\r\n";
        $body .= "Content-Transfer-Encoding: base64\r\n\r\n";
        echo $attachment . "<br />";
      }  
    }

现在表单正在静默提交，我没有看到服务器上 error_log 有任何内容。我做错了什么 - 代码更正将不胜感激。

Answer 1

$_FILES 是一个二维数组。第一个索引是上传文件的字段名，第二个索引是文件的信息。而不是以下循环：

foreach ($attachments as $attachment) {
  if ($attachment['size']) {
    $body .= "\r\n" . $boundary;
    $body .= "Content-Type: " . $attachment['type'] . "; name=\"". $attachment['filename'] . "\"\r\n";
    $body .= "Content-Transfer-Encoding: base64\r\n\r\n";
    $body .= $attachment['content'];
  }  
}

（$attachments只是你的第一个附件，不是全部），你可能想试试：

foreach ($_FILES as $attachment) {
  if ($attachment['size']) {
    $body .= "\r\n" . $boundary;
    $body .= "Content-Type: " . $attachment['type'] . "; name=\"". $attachment['filename'] . "\"\r\n";
    $body .= "Content-Transfer-Encoding: base64\r\n\r\n";
    $body .= base64_encode(file_get_contents($attachment['tmp_name']));
  }  
}

这将遍历所有附件，读入文件内容并对其进行 base64 编码，然后再将它们附加到您的电子邮件中。

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