FTP 函数
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ftp_fget

(PHP 4, PHP 5)

ftp_fget — 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

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

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

Example #1 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

版本 说明
4.3.0 增加了resumepos 的支持。

参见

FTP 函数
在线手册：中文  英文
PHP手册

用户评论:

mike at eastghost dot com (2013-03-03 02:22:53)

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.

broom at alturnanetworks dot com (2008-10-03 04:49:51)

<?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;
    }
}
?>

broom at alturnanetworks dot com (2008-10-03 04:18:34)

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']);
}
?>

justrafi at gmail dot com (2008-02-06 08:44:00)

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;
}

rodrigo-rocha at oi dot net dot br (2002-09-06 07:56:12)

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.

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