PHP에서 FTP 클래스를 이용하여 파일, 동영상 등을 업로드하는 간단한 구현 방법

文件1：ftp.php

<?php
/**
 * 仿写CodeIgniter的FTP类
 * FTP基本操作：
 * 1) 登陆; connect
 * 2) 当前目录文件列表; filelist
 * 3) 目录改变; chgdir
 * 4) 重命名/移动; rename
 * 5) 创建文件夹; mkdir
 * 6) 删除; delete_dir/delete_file
 * 7) 上传; upload
 * 8) 下载 download
 *
 * @author quanshuidingdang
 */
class Ftp {
 
 
private $hostname
= &#39;&#39;;
private $username
= &#39;&#39;;
private $password
= &#39;&#39;;
private $port
= 21;
private $passive
= TRUE;
private $debug
= TRUE;
private $conn_id
= FALSE;
 
/**
* 构造函数
*
* @param array 配置数组 : $config = array(&#39;hostname&#39;=>&#39;&#39;,&#39;username&#39;=>&#39;&#39;,&#39;password&#39;=>&#39;&#39;,&#39;port&#39;=>&#39;&#39;...);
*/
public function __construct($config = array()) {
if(count($config) > 0) {
$this->_init($config);
}
}
 
/**
* FTP连接
*
* @access public
* @param array 配置数组
* @return boolean
*/
public function connect($config = array()) {
if(count($config) > 0) {
$this->_init($config);
}
//判断是否打开了ftp连接
if(FALSE === ($this->conn_id = @ftp_connect($this->hostname,$this->port))) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_connect");
}
return FALSE;
}
//判断是否登录成功
if( ! $this->_login()) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_login");
}
return FALSE;
}
//判断是否开启FTP被动模式
if($this->passive === TRUE) {
ftp_pasv($this->conn_id, TRUE);
}
 
return TRUE;
}
 
 
 
/**
* 目录改变
*
* @access public
* @param string 目录标识(ftp)
* @param boolean 
* @return boolean
*/
public function chgdir($path = &#39;&#39;, $supress_debug = FALSE) {
if($path == &#39;&#39; OR ! $this->_isconn()) {
return FALSE;
}
 
$result = @ftp_chdir($this->conn_id, $path);
 
if($result === FALSE) {
if($this->debug === TRUE AND $supress_debug == FALSE) {
$this->_error("ftp_unable_to_chgdir:dir[".$path."]");
}
return FALSE;
}
 
return TRUE;
}
 
/**
* 目录生成
*
* @access public
* @param string 目录标识(ftp)
* @param int  文件权限列表 
* @return boolean
*/
public function mkdir($path = &#39;&#39;, $permissions = NULL) {
if($path == &#39;&#39; OR ! $this->_isconn()) {
return FALSE;
}
 
$result = @ftp_mkdir($this->conn_id, $path);
 
if($result === FALSE) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_mkdir:dir[".$path."]");
}
return FALSE;
}
 
if( ! is_null($permissions)) {
$this->chmod($path,(int)$permissions);
}
 
return TRUE;
}
 
/**
* 上传
*
* @access public
* @param string 本地目录标识
* @param string 远程目录标识(ftp)
* @param string 上传模式 auto || ascii
* @param int 上传后的文件权限列表
 
* @return boolean
*/
public function upload($localpath, $remotepath, $mode = &#39;auto&#39;, $permissions = NULL) {
if( ! $this->_isconn()) {
return FALSE;
}
//判断本地文件是否存在
if( ! file_exists($localpath)) {
if($this->debug === TRUE) {
$this->_error("ftp_no_source_file:".$localpath);
}
return FALSE;
}
//判断上传模式
if($mode == &#39;auto&#39;) {
      //获取文件后缀类型
$ext = $this->_getext($localpath);
      //根据后缀类型决定上传模式是 FTP_ASCII(文本模式) 还是 FTP_BINARY(二进制模式);
$mode = $this->_settype($ext);
}
 
$mode = ($mode == &#39;ascii&#39;) ? FTP_ASCII : FTP_BINARY;
//上传
$result = @ftp_put($this->conn_id, $remotepath, $localpath, $mode);
//判断上传是否成功
if($result === FALSE) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_upload:localpath[".$localpath."]/remotepath[".$remotepath."]");
}
return FALSE;
}
//判断是否需要改写文件权限
if( ! is_null($permissions)) {
$this->chmod($remotepath,(int)$permissions);
}
 
return TRUE;
}
 
/**
* 下载
*
* @access public
* @param string 远程目录标识(ftp)
* @param string 本地目录标识
* @param string 下载模式 auto || ascii
 
* @return boolean
*/
public function download($remotepath, $localpath, $mode = &#39;auto&#39;) {
if( ! $this->_isconn()) {
return FALSE;
}
 
if($mode == &#39;auto&#39;) {
$ext = $this->_getext($remotepath);
$mode = $this->_settype($ext);
}
 
$mode = ($mode == &#39;ascii&#39;) ? FTP_ASCII : FTP_BINARY;
 
$result = @ftp_get($this->conn_id, $localpath, $remotepath, $mode);
 
if($result === FALSE) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_download:localpath[".$localpath."]-remotepath[".$remotepath."]");
}
return FALSE;
}
 
return TRUE;
}
 
/**
* 重命名/移动
*
* @access public
* @param string 远程目录标识(ftp)
* @param string 新目录标识
* @param boolean 判断是重命名(FALSE)还是移动(TRUE)
 
* @return boolean
*/
public function rename($oldname, $newname, $move = FALSE) {
if( ! $this->_isconn()) {
return FALSE;
}
 
$result = @ftp_rename($this->conn_id, $oldname, $newname);
 
if($result === FALSE) {
if($this->debug === TRUE) {
$msg = ($move == FALSE) ? "ftp_unable_to_rename" : "ftp_unable_to_move";
$this->_error($msg);
}
return FALSE;
}
 
return TRUE;
}
 
/**
* 删除文件
*
* @access public
* @param string 文件标识(ftp)
* @return boolean
*/
public function delete_file($file) {
if( ! $this->_isconn()) {
return FALSE;
}
 
$result = @ftp_delete($this->conn_id, $file);
 
if($result === FALSE) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_delete_file:file[".$file."]");
}
return FALSE;
}
 
return TRUE;
}
 
/**
* 删除文件夹
*
* @access public
* @param string 目录标识(ftp)
* @return boolean
*/
public function delete_dir($path) {
if( ! $this->_isconn()) {
return FALSE;
}
 
//对目录宏的&#39;/&#39;字符添加反斜杠&#39;\&#39;
$path = preg_replace("/(.+?)\/*$/", "\\1/", $path);
 
//获取目录文件列表
$filelist = $this->filelist($path);
 
if($filelist !== FALSE AND count($filelist) > 0) {
foreach($filelist as $item) {
//如果我们无法删除,那么就可能是一个文件夹
//所以我们递归调用delete_dir()
if( ! @delete_file($item)) {
$this->delete_dir($item);
}
}
}
 
//删除文件夹(空文件夹)
$result = @ftp_rmdir($this->conn_id, $path);
 
if($result === FALSE) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_delete_dir:dir[".$path."]");
}
return FALSE;
}
 
return TRUE;
}
 
/**
* 修改文件权限
*
* @access public
* @param string 目录标识(ftp)
* @return boolean
*/
public function chmod($path, $perm) {
if( ! $this->_isconn()) {
return FALSE;
}
 
//只有在PHP5中才定义了修改权限的函数(ftp)
if( ! function_exists(&#39;ftp_chmod&#39;)) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_chmod(function)");
}
return FALSE;
}
 
$result = @ftp_chmod($this->conn_id, $perm, $path);
 
if($result === FALSE) {
if($this->debug === TRUE) {
$this->_error("ftp_unable_to_chmod:path[".$path."]-chmod[".$perm."]");
}
return FALSE;
}
return TRUE;
}
 
/**
* 获取目录文件列表
*
* @access public
* @param string 目录标识(ftp)
* @return array
*/
public function filelist($path = &#39;.&#39;) {
if( ! $this->_isconn()) {
return FALSE;
}
 
return ftp_nlist($this->conn_id, $path);
}
 
/**
* 关闭FTP
*
* @access public
* @return boolean
*/
public function close() {
if( ! $this->_isconn()) {
return FALSE;
}
 
return @ftp_close($this->conn_id);
}
 
/**
* FTP成员变量初始化
*
* @access private
* @param array 配置数组  
* @return void
*/
private function _init($config = array()) {
foreach($config as $key => $val) {
if(isset($this->$key)) {
$this->$key = $val;
}
}
 
 
//特殊字符过滤
$this->hostname = preg_replace(&#39;|.+?://|&#39;,&#39;&#39;,$this->hostname);
}
 
/**
* FTP登陆
*
* @access private
* @return boolean
*/
private function _login() {
return @ftp_login($this->conn_id, $this->username, $this->password);
}
 
/**
* 判断con_id
*
* @access private
* @return boolean
*/
private function _isconn() {
if( ! is_resource($this->conn_id)) {
if($this->debug === TRUE) {
$this->_error("ftp_no_connection");
}
return FALSE;
}
return TRUE;
}
 
/**
* 从文件名中获取后缀扩展
*
* @access private
* @param string 目录标识
* @return string
*/
private function _getext($filename) {
if(FALSE === strpos($filename, &#39;.&#39;)) {
return &#39;txt&#39;;
}
 
$extarr = explode(&#39;.&#39;, $filename);
return end($extarr);
}
 
/**
* 从后缀扩展定义FTP传输模式 ascii 或 binary
*
* @access private
* @param string 后缀扩展
* @return string
*/
private function _settype($ext) {
$text_type = array (
&#39;txt&#39;,
&#39;text&#39;,
&#39;php&#39;,
&#39;phps&#39;,
&#39;php4&#39;,
&#39;js&#39;,
&#39;css&#39;,
&#39;htm&#39;,
&#39;html&#39;,
&#39;phtml&#39;,
&#39;shtml&#39;,
&#39;log&#39;,
&#39;xml&#39;
);
 
return (in_array($ext, $text_type)) ? &#39;ascii&#39; : &#39;binary&#39;;
}
 
/**
* 错误日志记录
*
* @access prvate
* @return boolean
*/
private function _error($msg) {
return @file_put_contents(&#39;ftp_err.log&#39;, "date[".date("Y-m-d H:i:s")."]-hostname[".$this->hostname."]-username[".$this->username."]-password[".$this->password."]-msg[".$msg."]\n", FILE_APPEND);
}
}
 
 
/*End of file ftp.php*/
/*Location /Apache Group/htdocs/ftp.php*/

 文件2：ftp_demo.php

<?php
require_once(&#39;ftp.php&#39;);
 
 
$config = array(
&#39;hostname&#39; => &#39;101.64.183.92&#39;, //服务器地址
&#39;username&#39; => &#39;ftpadminuser&#39;,  //FTP登录账号
&#39;password&#39; => &#39;admin_user&#39;,   //FTP登录密码
&#39;port&#39; => 2112         //端口号
);
 
 
$ftp = new Ftp();
//连接
$ftp->connect($config);
//上传第一个参数是本地文件名，第二个参数是FTP文件名
$rs=$ftp->upload(&#39;jsyh.flv&#39;,&#39;jsyh.flv&#39;);
if($rs){
  echo 1;
}
// $ftp->download(&#39;ftp_upload.log&#39;,&#39;ftp_download.log&#39;);

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