php文件上传代码（支持文件批量上传）

class upload
{
public $savepath;
public $files;
private $error;

function __construct($inputname ='files', $savepath = '', $savename = '', $alowexts = array(),$maxsize = 1024000)
{
if(!$alowexts)$alowexts=explode('|',upload_ftype);
$file_array=array();
$savepath=str_replace('','/',$savepath);
$savename=preg_replace('/[^a-z0-9_]+/i','',$savename);
$this->savepath=substr($savepath,-1)=='/'?$savepath:$savepath.'/'; //路径名以/结尾

if(!make_dir($this->savepath))
{
$this->error=8;
$this->error();
}
//exit($this->savepath);
if(!is_writeable($this->savepath))
{
$this->error=9;
$this->error();
}
if(sizeof($_files[$inputname]['error'])>10)
{
$this->error=13;
$this->error();
}
$max=sizeof($_files[$inputname]['error'])-1;
//exit($this->savepath.$savename);
foreach($_files[$inputname]['error'] as $key => $error)
{
if($error==upload_err_ok) //批量上传
{
$savename=$savename?$savename:date('ymdims').mt_rand(10000,99999);
$fileext=strtolower(get_fileext($_files[$inputname]['name'][$key]));
$savename=$savename.'.'.$fileext;
$tmp_name=$_files[$inputname]['tmp_name'][$key];
$filesize=$_files[$inputname]['size'][$key];
if(!in_array($fileext,$alowexts))
{
$this->error=10;
$this->error();
}
if($filesize>$maxsize)
{
$this->error=11;
$this->error();
}
if(!$this->isuploadedfile($tmp_name))
{
$this->error=12;
$this->error();
}

if(move_uploaded_file($tmp_name,$this->savepath.$savename) || @copy($tmp_name,$this->savepath.$savename))
{
//exit($this->savepath.$savename);
@chmod($savename, 0644);
@unlink($tmp_name);
$file_array[]=$this->savepath.$savename;
}
}
else
{
$this->error=$error;
$this->error();
}
unset($savename);
}
$this->files=$file_array;
return true;
}

function isuploadedfile($file) //去掉系统自带的反斜线
{
return (is_uploaded_file($file) || is_uploaded_file(str_replace('','',$file)));
}

function error()
{
$upload_error=array(0 => '文件上传成功 !',
1 => '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值 !',
2 => '上传文件的大小超过了 html 表单中 max_file_size 选项指定的值 !',
3 => '文件只有部分被上传 !',
4 => '没有文件被上传 !',
5 => '未知错误!',
6 => '找不到临时文件夹。 !',
7 => '文件写入临时文件夹失败 !',
8 => '附件目录创建失败 !',
9 => '附件目录没有写入权限 !',
10 => '不允许上传该类型文件 !',
11 => '文件超过了管理员限定的大小 !',
12 => '非法上传文件 !',
13 => '最多可同时上传10个文件 !'
);
showmsg($upload_error[$this->error]);
}

}