PHP 多级目录上传方法

//ftp创建多级目录方法：

$path="PHP/test";  //测试路径
$dir=explode('/',$path);
$path="";
for($i=0;$i<count($dir);$i++){
$path.="/".$dir[$i];
echo $path."<br/>";
if(!@ftp_chdir($conn_id,$path)){
@ftp_chdir($conn_id,"/");
if(!@ftp_mkdir($conn_id,$path)){
$ret=false;
break;
}
}
}
$remote_file ="$path".'/'.$_FILES['uploadfile']['name'];
echo $remote_file.'<br/>';
if (ftp_put($conn_id, $remote_file, $file, FTP_BINARY)) {
echo "文件:".$_FILES['uploadfile']['name']."上传成功";
} else {
echo "上传失败";
}
return true;