有哪位前辈用PHP写过FTP方面的程序？

我用程序ftp下到服务器上的文件总是不完整，少了很多字节数。

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ftp.class.php
[php]
<?
class Friend_FTP {

var $FTP_HOST; //FTP 主机名
var $FTP_PORT = 21; //FTP 端口号
var $FTP_USER; //FTP 用户名
var $FTP_PWD; //FTP用户密码

var $FTP_DIR; //FTP 目的目录
var $LOCAL_DIR; //FTP 源目录

function Friend_FTP($FTP_HOST,$FTP_PORT,$FTP_USER,$FTP_PWD,$FTP_DIR,$LOCAL_DIR){

$this ->FTP_HOST = $FTP_HOST;
$this ->FTP_PORT = $FTP_PORT;
$this ->FTP_USER = $FTP_USER;
$this ->FTP_PWD = $FTP_PWD;
$this ->FTP_DIR = $FTP_DIR;
$this ->LOCAL_DIR = $LOCAL_DIR;

}

function Friend_FTP_UP(){

$handle=opendir($this ->LOCAL_DIR);
while (false !== ($file = @readdir($handle)))
{
if(is_file($this ->LOCAL_DIR.$file))
{
$f[]=$file;
}
}
closedir($handle);
sort($f);

$mode = FTP_BINARY; // or FTP_ASCII

$conn_id = ftp_connect($this ->FTP_HOST, $this ->FTP_PORT);
ftp_login($conn_id, $this ->FTP_USER, $this ->FTP_PWD);

ftp_pwd($conn_id);
ftp_chdir($conn_id,$this ->FTP_DIR);

foreach($f as $files)
{
$from = fopen($this ->LOCAL_DIR.$files,"r");
ftp_fput($conn_id, $files, $from, $mode);
}

ftp_quit($conn_id);
}


}
?>
[/php]
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ftp.up.php
[php]
<?php

include ("ftp.class.php");


$FTP_HOST = "127.0.0.1";
$FTP_PORT = 21;
$FTP_USER = "test";
$FTP_PWD = "123";

$LOCAL_DIR = "/test/";
$FTP_DIR = "/";


$a = new Friend_FTP($FTP_HOST,$FTP_PORT,$FTP_USER,$FTP_PWD,$FTP_DIR,$LOCAL_DIR);
$a ->Friend_FTP_UP();

?>
[/php]