ftp_fget()

(PHP 4, PHP 5, PHP 7)

从 FTP 服务器上下载一个文件并保存到本地一个已经打开的文件中

说明

ftp_fget(resource $ftp_stream,resource $handle,string $remote_file,int $mode[,int $resumepos= 0]): bool

ftp_fget()函数用来下载由$remote_file指定的文件，并写入到本地已经被打开的一个文件中。

参数

$ftp_stream

FTP 连接的链接标识符。

$handle

本地已经打开的文件的句柄。

$remote_file

远程文件的路径。

$mode

传送模式参数，必须是(文本模式)FTP_ASCII或(二进制模式)FTP_BINARY中的一个。

$resumepos

远程文件开始下载的位置。

返回值

成功时返回TRUE，或者在失败时返回FALSE。

范例

ftp_fget()例子

<?php
// path to remote file
$remote_file = 'somefile.txt';
$local_file = 'localfile.txt';
// open some file to write to
$handle = fopen($local_file, 'w');
// 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);
// try to download $remote_file and save it to $handle
if (ftp_fget($conn_id, $handle, $remote_file, FTP_ASCII, 0)) {
 echo "successfully written to $local_file\n";
} else {
 echo "There was a problem while downloading $remote_file to $local_file\n";
}
// close the connection and the file handler
ftp_close($conn_id);
fclose($handle);
?>

更新日志

参见

• ftp_get()从 FTP 服务器上下载一个文件
• ftp_nb_get()从 FTP 服务器上获取文件并写入本地文件（non-blocking）
• ftp_nb_fget()从 FTP 服务器获取文件并写入到一个打开的文件（非阻塞）

Another ftp_get_contents approach, using a temperary stream handler. Returns file contents as string. 
<?php
function ftp_get_contents ($conn_id, $filename,
//Create temp handler:
  $tempHandle = fopen('php://temp', 'r+');
//Get file from FTP assuming that it exists:
  ftp_fget($conn_id, $tempHandle, $filename, FTP_ASCII, 0));
  //Getting detailed stats to check filesize:
  $fstats = fstat($tempHandle);
  return fread($tempHandle, $fstats['size']);
}
?>

<?php
/** 
 * Function returns contents via FTP connection and returns it as string (right version...)
 */
function ftp_get_contents ($conn_id, $filename) {
  //Create temp handler:
  $tempHandle = fopen('php://temp', 'r+');
  
  //Get file from FTP:
  if (@ftp_fget($conn_id, $tempHandle, $filename, FTP_ASCII, 0)) {
    rewind($tempHandle);
    return stream_get_contents($tempHandle);
  } else {
    return false;
  }
}
?>

You might need to use ftp_pasv() if you're behind a firewall and receiving odd timeouts, file creation but now local data saving, etc.

If you suply only a filename to the second parameter of function the ftp_get will open a pointer to the local file creating it and write to it.It's ok if your server dont execute for to mutch time and you dont get too many files but if you do it too many times the pointers created by ftp_get will not be closed and will end your opened files capacity at your server making it to do not open any more files until you restart it.

if you are using windows ftp-server with cp1251 encoding there are some troubles with russian "я" in filename\path.
php use telnet to connect ftp-server and there are special symbol with code 255 in telnet protocol. You can try use ftp_raw($connection, 'OPTS UTF8 ON'); and work in utf-8 (if server provides it).
P.S. sorry for my bad english

I was in need to synchronize two folders on two separate servers, one is a Windows server, and the other is a Linux server. I created this short and sweet function to help me do this. PLEASE NOTICE: This will not copy folders, and probably will fail if remote folder contains anything else than files.
function sync_folders($host, $port, $username, $password, $remote_dir, $local_dir, $passive_mode = true) {
  $conn_id = ftp_connect($host, $port);
  if (!$conn_id) return false; # fail to connect
  if (!ftp_login($conn_id, $username, $password)) { ftp_close($conn_id); return false; } # fail to login
  ftp_pasv($conn_id, $passive_mode);
  if (!ftp_chdir($conn_id, $remote_dir)) { ftp_close($conn_id); return false; } # fail to change dir
  if (substr($local_dir, -1) != '/') $local_dir .= '/';
  $list = ftp_nlist($conn_id, '.');
  sort($list);
  foreach ($list as $file) {
    if (!file_exists($local_dir . $file)) {
      $is_copied = ftp_get($conn_id, $local_dir . $file, $file, FTP_BINARY);
    }
  }
  ftp_close($conn_id);
  return true;
}