Question

我需要上传文件并将上传的文件作为邮件附件发送，并从网页下载文件。文件的内容以mediumblob数据类型存储在数据库中。上传文件和发送文件作为附件工作正常。当我下载文件时，内容不是可读格式。内容显示为

PD9waHANCg0KLy8gTWFrZSBhIE15U1FMIENvbm5lY3Rpb24NCiRob3N0PSJUZWthbGFkYi5kYi45
MTM1MTgyLmhvc3RlZHJlc291cmNlLmNvbSI7DQokdXNlcj0iVGVrYWxhZGIiOw0KJHBhc3N3b3Jk

这是代码

upload.php的

<?php
session_start();
// Read POST request params into global vars
include_once "db.php";

$name1=mysql_real_escape_string(stripslashes($_POST['name1']));
$subject1=mysql_real_escape_string(stripslashes($_POST['subject1']));
$email1=$_POST['email1'];
$phone=$_POST['phone'];
$username=mysql_real_escape_string($_SESSION['sess_user4']);
  $to = "abc@gmail.com";
 $from=$_POST['email1'];
 $fileatt      = $_FILES['fileatt']['tmp_name'];
 $fileatt_type = $_FILES['fileatt']['type'];
 $fileatt_name = mysql_real_escape_string($_FILES['fileatt']['name']);
 $fileatt_size = $_FILES['fileatt']['size']; 
 $aa=filesize($fileatt);
$headers = "From: $from";
if (is_uploaded_file($fileatt)) {
  // Read the file to be attached ('rb' = read binary)
$name1=mysql_real_escape_string(stripslashes($_POST['name1']));
  $file = fopen($fileatt,'r');
  $content = fread($file,filesize($fileatt));


fclose($file);
$message="Name:$name1\n\n
          Email:$email1\n
          Subject:$subject1\n
          Phone No:$phone";
  // Generate a boundary string
  $semi_rand = md5(time());
  $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";


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

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

  // Base64 encode the file data
  $content = chunk_split(base64_encode($content));

  // Add file attachment to the message
  $message .= "--{$mime_boundary}\n" .
              "Content-Type: {$fileatt_type};\n" .
              " name=\"{$fileatt_name}\"\n" .
              //"Content-Disposition: attachment;\n" .
              //" filename=\"{$fileatt_name}\"\n" .
              "Content-Transfer-Encoding: base64\n\n" .
              $content . "\n\n" .
              "--{$mime_boundary}--\n";

}

// Send the message
$ok = @mail($to, $subject, $message, $headers);
if ($ok) {
   echo "<script>window.open('display.php','_self')</script>";
} else {
  echo "<p>Mail could not be sent. Sorry!</p>";
}
$query = "INSERT INTO register (name,type,size,content,name1,email1,subject1,phone,username) VALUES ('$fileatt_name','$fileatt_type','$fileatt_size','$content','$name1','$email1','$subject1','$phone','$username')";

mysql_query($query) or die('Error, query failed');  

?>

的download.php

   <html>
        <head>
            <title>Download File From MySQL Database</title>
            <meta http-equiv="Content-Type" content="text/html; 
                  charset=iso-8859-1">
        </head>
        <body>
        <?php
     include_once "db.php";
    if(isset($_GET['id'])) { // if id is set then get the file with the id from database
   $id = $_GET['id'];
 $content = chunk_split(base64_decode($content));
   $query = "SELECT name, type, size, content FROM register WHERE id = $id";
   $result = mysql_query($query) or die('Error, query failed');
   list($name, $type, $size, $content) = mysql_fetch_array($result);
   header("Content-length: $size");
   header("Content-type: $type");
   header("Content-Disposition: attachment; filename=$name");
   echo $content; exit;
   }
   $query = "SELECT id, name FROM register";
  $result = mysql_query($query) or die('Error, query failed');
  if(mysql_num_rows($result) == 0)
  {
   echo "Database is empty";
  }
  else
  {
   while(list($id, $name) = mysql_fetch_array($result)) 
   {
   ?> 
     <a href="download.php?id=<?php echo $id;?>"><?php echo $name; ?></a>
   <?php
    }
    }
    ?>
   </body>
    </html>

Answer 1

我认为问题出现在已设置的标题中。试试这段代码：

<?php
include_once "db.php";
if (isset($_GET['id'])) { // if id is set then get the file with the id from database
    $id = $_GET['id'];
    $query = "SELECT name, type, size, content FROM register WHERE id = $id";
    $result = mysql_query($query) or die('Error, query failed');
    list($name, $type, $size, $content) = mysql_fetch_array($result);
    header("Content-length: $size");
    header("Content-type: $type");
    header("Content-Disposition: attachment; filename=$name");
    echo base64_decode(str_replace("\n", "", $content));
    exit;
} else {
?>
<html>
<head>
    <title>Download File From MySQL Database</title>
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<?php
$query = "SELECT id, name FROM register";
$result = mysql_query($query) or die('Error, query failed');
if (mysql_num_rows($result) == 0) {
    echo "Database is empty";
}
else {
    while (list($id, $name) = mysql_fetch_array($result)) {
        ?>
        <a href="download.php?id=<?php echo $id; ?>"><?php echo $name; ?></a>
        <?php
    }
}
}
?>
</body>
</html>

上传sendfile文件作为附件并在php中下载文件

1 个答案: