如何在PHP中使用FTP从另一台服务器传输文件 [英] How to transfer files from another server, using FTP, in PHP
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问题描述
我正在尝试找到一种从服务器到服务器传输文件的方法.源服务器可以是任何平台，除了支持FTP，我们甚至可能对它一无所知.
I am trying to find a way to transfer files from server-to-server. The source server can be any platform, and we may not even really know anything about it except that it supports FTP.
为此，我在SO上找到了许多帖子，建议使用scp，sftp，rsync或wget.既然该PHP脚本每次都需要工作，并且我们唯一可以确定的是源服务器支持FTP，那么如何实现呢?
A number of posts I have found on SO recommend using scp, sftp, rsync, or wget for this purpose. Given that this PHP script needs to work every time, and the only thing we know for sure is that the source server supports FTP, how can this be achieved?
我在SO上找到了两个FTP示例，但是并没有很好地解释它们.
I found a couple FTP examples on SO, but they weren't explained very well.
我们需要能够下载所有文件和文件夹，并保持相同的目录结构.
We need to be able to download all files and folders, keeping the same directory structure as well.
推荐答案
我发现了一个PHP类，它使递归FTP上载和下载变得容易.可以在此处
I have found a PHP class that makes recursive FTP uploads and downloads easy. It can be found here
下面是他们使用的代码(顶部的代码是用于下载，上传和错误检查的示例代码):
The code they used is below (The code at the top is example code for downloads, uploads, and error checking):
<?php // example
set_time_limit(0);
require 'ftp.php';
$ftp = new ftp();
$ftp->conn('host', 'username', 'password');
$ftp->get('download/demo', '/demo'); // download live "/demo" folder to local "download/demo"
$ftp->put('/demo/test', 'upload/vjtest'); // upload local "upload/vjtest" to live "/demo/test"
$arr = $ftp->getLogData();
if ($arr['error'] != "")
echo '<h2>Error:</h2>' . implode('<br />', $arr['error']);
if ($arr['ok'] != "")
echo '<h2>Success:</h2>' . implode('<br />', $arr['ok']);
class ftp {
private $conn, $login_result, $logData, $ftpUser, $ftpPass, $ftpHost, $retry, $ftpPasv, $ftpMode, $verbose, $logPath, $createMask;
// --------------------------------------------------------------------
/**
* Construct method
*
* @param array keys[passive_mode(true|false)|transfer_mode(FTP_ASCII|FTP_BINARY)|reattempts(int)|log_path|verbose(true|false)|create_mask(default:0777)]
* @return void
*/
function __construct()
{
$this->retry = (isset($o['reattempts'])) ? $o['reattempts'] : 3;
$this->ftpPasv = (isset($o['passive_mode'])) ? $o['passive_mode'] : true;
$this->ftpMode = (isset($o['transfer_mode'])) ? $o['transfer_mode'] : FTP_BINARY;
$this->verbose = (isset($o['verbose'])) ? $o['verbose'] : false;
$this->logPath = (isset($o['log_path'])) ? $o['log_path'] : dirname(__FILE__).'\log';
$this->createMask = (isset($o['create_mask'])) ? $o['create_mask'] : 0777;
}
// --------------------------------------------------------------------
/**
* Connection method
*
* @param string hostname
* @param string username
* @param string password
* @return void
*/
public function conn($hostname, $username, $password)
{
$this->ftpUser = $username;
$this->ftpPass = $password;
$this->ftpHost = $hostname;
$this->initConn();
}
// --------------------------------------------------------------------
/**
* Init connection method - connect to ftp server and set passive mode
*
* @return bool
*/
function initConn()
{
$this->conn = ftp_connect($this->ftpHost);
$this->login_result = ftp_login($this->conn, $this->ftpUser, $this->ftpPass);
if($this->conn && $this->login_result)
{
ftp_pasv($this->conn, $this->ftpPasv);
return true;
}
return false;
}
// --------------------------------------------------------------------
/**
* Put method - upload files(folders) to ftp server
*
* @param string path to destionation file/folder on ftp
* @param string path to source file/folder on local disk
* @param int only for identify reattempt, dont use this param
* @return bool
*/
public function put($destinationFile, $sourceFile, $retry = 0)
{
if(file_exists($sourceFile))
{
if(!$this->isDir($sourceFile, true))
{
$this->createSubDirs($destinationFile);
if(!ftp_put($this->conn, $destinationFile, $sourceFile, $this->ftpMode))
{
$retry++;
if($retry > $this->retry)
{
$this->logData('Error when uploading file: '.$sourceFile.' => '.$destinationFile, 'error');
return false;
}
if($this->verbose) echo 'Retry: '.$retry."\n";
$this->reconnect();
$this->put($destinationFile, $sourceFile, $retry);
}
else
{
$this->logData('Upload:'.$sourceFile.' => '.$destinationFile, 'ok');
return true;
}
}
else
{
$this->recursive($destinationFile, $sourceFile, 'put');
}
}
}
// --------------------------------------------------------------------
/**
* Get method - download files(folders) from ftp server
*
* @param string path to destionation file/folder on local disk
* @param string path to source file/folder on ftp server
* @param int only for identify reattempt, dont use this param
* @return bool
*/
public function get($destinationFile, $sourceFile, $retry = 0)
{
if(!$this->isDir($sourceFile, false))
{
if($this->verbose)echo $sourceFile.' => '.$destinationFile."\n";
$this->createSubDirs($destinationFile, false, true);
if(!ftp_get($this->conn, $destinationFile, $sourceFile, $this->ftpMode))
{
$retry++;
if($retry > $this->retry)
{
$this->logData('Error when downloading file: '.$sourceFile.' => '.$destinationFile, 'error');
return false;
}
if($this->verbose) echo 'Retry: '.$retry."\n";
$this->reconnect();
$this->get($destinationFile, $sourceFile, $retry);
}
else
{
$this->logData('Download:'.$sourceFile.' => '.$destinationFile, 'ok');
return true;
}
}
else
{
$this->recursive($destinationFile, $sourceFile, 'get');
}
}
// --------------------------------------------------------------------
/**
* Make dir method - make folder on ftp server or local disk
*
* @param string path to destionation folder on ftp or local disk
* @param bool true for local, false for ftp
* @return bool
*/
public function makeDir($dir, $local = false)
{
if($local)
{
if(!file_exists($dir) && !is_dir($dir))return mkdir($dir, $this->createMask); else return true;
}
else
{
ftp_mkdir($this->conn,$dir);
return ftp_chmod($this->conn, $this->createMask, $dir);
}
}
// --------------------------------------------------------------------
/**
* Cd up method - change working dir up
*
* @param bool true for local, false for ftp
* @return bool
*/
public function cdUp($local)
{
return $local ? chdir('..') : ftp_cdup($this->conn);
}
// --------------------------------------------------------------------
/**
* List contents of dir method - list all files in specified directory
*
* @param string path to destionation folder on ftp or local disk
* @param bool true for local, false for ftp
* @return bool
*/
public function listFiles($file, $local = false)
{
if(!$this->isDir($file, $local))return false;
if($local)
{
return scandir($file);
}
else
{
if(!preg_match('/\//', $file))
{
return ftp_nlist($this->conn, $file);
}else
{
$dirs = explode('/', $file);
foreach($dirs as $dir)
{
$this->changeDir($dir, $local);
}
$last = count($dirs)-1;
$this->cdUp($local);
$list = ftp_nlist($this->conn, $dirs[$last]);
$i = 0;
foreach($dirs as $dir)
{
if($i < $last) $this->cdUp($local);
$i++;
}
return $list;
}
}
}
// --------------------------------------------------------------------
/**
* Returns current working directory
*
* @param bool true for local, false for ftp
* @return bool
*/
public function pwd($local = false)
{
return $local ? getcwd() : ftp_pwd($this->conn);
}
// --------------------------------------------------------------------
/**
* Change current working directory
*
* @param string dir name
* @param bool true for local, false for ftp
* @return bool
*/
public function changeDir($dir, $local = false)
{
return $local ? chdir($dir) : @ftp_chdir($this->conn, $dir);
}
// --------------------------------------------------------------------
/**
* Create subdirectories
*
* @param string path
* @param bool
* @param bool true for local, false for ftp
* @param bool change current working directory back
* @return void
*/
function createSubDirs($file, $last = false, $local = false, $chDirBack = true)
{
if(preg_match('/\//',$file))
{
$origin = $this->pwd($local);
if(!$last) $file = substr($file, 0, strrpos($file,'/'));
$dirs = explode('/',$file);
foreach($dirs as $dir)
{
if(!$this->isDir($dir, $local))
{
$this->makeDir($dir, $local);
$this->changeDir($dir, $local);
}
else
{
$this->changeDir($dir, $local);
}
}
if($chDirBack) $this->changeDir($origin, $local);
}
}
// --------------------------------------------------------------------
/**
* Recursion
*
* @param string destionation file/folder
* @param string source file/folder
* @param string put or get
* @return void
*/
function recursive($destinationFile, $sourceFile, $mode)
{
$local = ($mode == 'put') ? true : false;
$list = $this->listFiles($sourceFile, $local);
if($this->verbose) echo "\n".'Folder: '.$sourceFile."\n";
$this->logData(($mode=='get')?('Download:'):('Upload:').$sourceFile.' => '.$destinationFile, 'ok');
if($this->verbose) print_r($list);
$x=0;
$z=0;
if(count($list)==2)// blank folder
{
if($mode == 'get')
$this->makeDir($destinationFile, true);
if($mode == 'put')
$this->makeDir($destinationFile);
}
foreach($list as $file)
{
if($file == '.' || $file == '..')continue;
$destFile = $destinationFile.'/'.$file;
$srcFile = $sourceFile.'/'.$file;
if($this->isDir($srcFile,$local))
{
$this->recursive($destFile, $srcFile, $mode);
}
else
{
if($local)
{
$this->put($destFile, $srcFile);
}
else
{
$this->get($destFile, $srcFile);
}
}
}
}
// --------------------------------------------------------------------
/**
* Check if is dir
*
* @param string path to folder
* @return bool
*/
public function isDir($dir, $local)
{
if($local) return is_dir($dir);
if($this->changeDir($dir))return $this->cdUp(0);
return false;
}
// --------------------------------------------------------------------
/**
* Save log data to array
*
* @param string data
* @param string type(error|ok)
* @return void
*/
function logData($data, $type)
{
$this->logData[$type][] = $data;
}
// --------------------------------------------------------------------
/**
* Get log data array
*
* @return array
*/
public function getLogData()
{
return $this->logData;
}
// --------------------------------------------------------------------
/**
* Save log data to file
*
* @return void
*/
public function logDataToFiles()
{
if(!$this->logPath) return false;
$this->makeDir($this->logPath, true);
$log = $this->getLogData();
$sep = "\n".date('y-m-d H:i:s').' ';
if($log['error'] != "")
{
$logc = date('y-m-d H:i:s').' '.join($sep,$log['error'])."\n";
$this->addToFile($this->logPath.'/'.$this->ftpUser.'-error.log',$logc);
}
if($log['ok'] != "")
{
$logc = date('y-m-d H:i:s').' '.join($sep,$log['ok'])."\n";
$this->addToFile($this->logPath.'/'.$this->ftpUser.'-ok.log',$logc);
}
}
// --------------------------------------------------------------------
/**
* Reconnect method
*
* @return void
*/
public function reconnect()
{
$this->closeConn();
$this->initConn();
}
// --------------------------------------------------------------------
/**
* Close connection method
*
* @return void
*/
public function closeConn()
{
return ftp_close($this->conn);
}
// --------------------------------------------------------------------
/**
* Write to file
*
* @param string path to file
* @param string text
* @param string fopen mode
* @return void
*/
function addToFile($file, $ins, $mode = 'a')
{
$fp = fopen($file, $mode);
fwrite($fp,$ins);
fclose($fp);
}
// --------------------------------------------------------------------
/**
* Destruct method - close connection and save log data to file
*
* @return void
*/
function __destruct()
{
$this->closeConn();
$this->logDataToFiles();
}
}
// END ftp class
/* End of file ftp.php */
/* Location: ftp.php */
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