PHP FTP上传错误：警告：ftp_put（）[function.ftp-put]：文件名不能为空

问题描述

使用PHP完成我的FTP文件上传器时遇到了一些麻烦。我使用php.net中的示例在此处找到：并稍微修改了代码。

  
  name 可能不会在发送文件时发生错误。这会导致您尝试上传到 members / userUploads / ，这会导致 ftp_upload 正确地抱怨空文件名。
 
 
 
错误的常见原因是超过了允许的最大文件大小。至少，在尝试FTP上传之前，检查文件的 $ _ FILES 条目中的错误： p> 
 
 
  if（$ _FILES ['userfile'] ['error']！= UPLOAD_ERR_OK）{
 //处理错误而不是上传，例如给用户一个消息
} 
  
你可以找到。
 
I'm having some trouble finishing my FTP file uploader using PHP.  I'm using the example from php.net found here: http://php.net/manual/en/ftp.examples-basic.php and have modified the code slightly.
<?php
//Start session();
session_start();

// Checking the users logged in
require_once('config.php');

//Connect to mysql server
    $link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
    if(!$link) {
        die('Failed to connect to server: ' . mysql_error());
    }

    //Select database
    $db = mysql_select_db(DB_DATABASE);
    if(!$db) {
        die("Unable to select database");
    }

$ftp_server="*";

$ftp_user_name="*";

$ftp_user_pass="*";

$paths="members/userUploads";

$name=$_FILES['userfile']['name'];

$source_file=$_FILES['userfile']['tmp_name'];

// set up basic connection
$conn_id = ftp_connect($ftp_server);

// login with username and password
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);

// check connection
if ((!$conn_id) || (!$login_result)) {
    echo "FTP connection has failed!";
    echo "Attempted to connect to $ftp_server for user $ftp_user_name";
    exit;
} else {
    echo "Connected to $ftp_server, for user $ftp_user_name";
}

// upload the file
$upload = ftp_put($conn_id, $paths.'/'.$name, $source_file, FTP_BINARY);

// check upload status
if (!$upload) {
    echo "FTP upload has failed!";
} else {
    $CurrentUser = $_SESSION['CurrentUser'];
    $qry = "SELECT * FROM members WHERE username='$CurrentUser'";
    $result = mysql_query($qry);
    $result = mysql_fetch_array($result);
    $CurrentUser = $result[memberID];
    $qry = "INSERT into uploads (UploadPath, UploadUser) VALUES('$file_name', '$CurrentUser')";
    echo "Uploaded $source_file to $ftp_server as $paths.'/'.$name";
}

// close the FTP stream
ftp_close($conn_id);
?>
However, the code will work for some files but not others.  When it doesn't work it gives the error: 
 解决方案 
The name might not be set if there was an error when sending the file. This would cause you to try to upload to members/userUploads/, which would cause ftp_upload to rightly complain about an empty filename.
A common reason for the error is exceeding the maximum allowed filesize. At the very least, check the error in the $_FILES entry for your file before attempting the FTP upload:
if ($_FILES['userfile']['error'] != UPLOAD_ERR_OK) {
   // handle the error instead of uploading, e.g. give a message to the user
}
You can find the description of the possible error codes  in the PHP manual.
                        
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