PHP5+UTF8多文件上传类

还有些功能没有加上去,如自动更名,图片处理等.可根据需要自己添加.
USE:
$up = new upfile(ROOT_PATH.'data/'.date("Ym",time()),array('gif','jpg','jpeg'),true);
$fileimg = $up->upload($_FILES['img']);//返回上传后文件名数组,$_FILES['img']为上传的文件
可使用$up->log查看上传时信息.
<?php
//====================================================
// FileName: upfile.class.php
// Summary: 文件上传类
// Author: millken(迷路林肯)
// LastModifed: 2008-6-4
// copyright (c)2008 millken@gmail.com
//====================================================
if(!defined('OK'))exit(FILE.'Access Denied');
class upfile {
public $ExtensionFileFormat = array();
public $returninfo = array();
private $ImageFileFormat = array('gif','bmp','jpg','jpe','jpeg','png');
private $OtherFileFormat = array('zip','pdf','rar','xls','doc','ppt','csv');
private $savePath;
private $attachment_path = './upfiles/';
private $overwrite = false; # 同名时是否覆盖
private $maxSize = 0; # 文件最大字节，为0时不限制大小
private $ext;
private $errno = 0;
/* 构造函数

• (string)$savePath 文件保存路径，默认为$attachment_path
• (array)$extensionFileFormat 自定义上传文件的扩展名，未设置时为$ImageFileFormat || $OtherFileFormat
• (bool)$overwrite 是否覆盖同名文件
  /
  public function __construct($savePath='',$extensionFileFormat = array(),$overwrite = false) {
  $this->savePath = empty($savePath)?$this->attachment_pathsavePath.'/';
  $this->extensionFileFormat = is_array($extensionFileFormat)?$extensionFileFormat:array();
  $this->overwrite = is_bool($overwrite)?$overwrite:false;
  }
  /上传函数
• (array)$files 待上传的文件数组$_FILES['attach']
• (number)$maxSize 文件的最大字节数，默认为0不限制上传大小
  /
  public function upload($files,$maxSize=0) {
  $this->maxSize = is_numeric($maxSize)?$maxSize:0;
  if(isset($files) && is_array($files)) {
  if(is_array($files['name'])) {
  foreach($files as $key => $var) {
  foreach($var as $id => $val) {
  $attachments[$id][$key] = $val;
  }
  }
  } else {
  $attachments[] = $files;
  }
  }
  self::check_file_type($attachments);
  if(empty($this->filelist)) {
  $this->log .= "待上传的文件列表为空。\n";
  return array();
  }
  if(!self::makeDirectory() || !@is_writable($this->savePath)) {
  $this->log .= $this->savePath . "不能创建或其权限为不可写。\n";
  return array();
  }
  $filearray = array();
  foreach($this->filelist as $k=>$f) {
  if($this->maxSize && $f['size']>$this->maxSize) {
  $this->log .= $f['name'] . "其大小超过了设定的值：" . $this->maxSize ."\n";
  }elseif($this->overwrite == false && file_exists($this->savePath . $f['name'])) {
  $this->log .= $f['name'] . "已经存在于目录：" . $this->savePath . "\n";
  }else{
  @unlink($this->savePath . $f['name']);
  if(@move_uploaded_file($f['tmp_name'],$this->savePath . mb_convert_encoding($f['name'],'gbk','utf-8'))) {//如果不进行编码转换，中文将无法支持
  $this->log .= $f['name'] . "成功上传到目录：". $this->savePath ."\n";
  $filearray[$k] = $this->savePath . $f['name'];
  }else{
  $this->log .= $f['name'] . "上传失败。\n";
  }
  }
  }
  return $filearray;
  }
  /检测文件的类型
  (array)$files 文件数组
  /
  private function check_file_type($files) {
  $this->filelist = array();
  foreach($files as $key=>$file) {
  if($file['error'] == 0) {
  $ext = strtolower(substr($file['name'], strrpos($file['name'], '.') + 1));
  $str = @file_get_contents($file['tmp_name'],FALSE,NULL,0,20);
  if((in_array($ext,array('jpg','jpeg')) && substr($str ,0, 3) !== "\xFF\xD8\xFF") || ($ext == 'gif' && substr($str ,0, 4) !== 'GIF8') || ($ext == 'png' && substr($str ,0, 8) !== "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A") || ($ext == 'bmp' && substr($str ,0, 2) !== 'BM') || ($ext == 'swf' && (substr($str ,0, 3) !== 'CWS' || substr($str ,0, 3) !== 'FWS')) || ($ext == 'zip' && substr($str ,0, 4) !== "PK\x03\x04") || ($ext == 'rar' && substr($str ,0, 4) !== 'Rar!') || ($ext == 'pdf' && substr($str ,0, 4) !== "\x25PDF") || ($ext == 'chm' && substr($str ,0, 4) !== 'ITSF') || ($ext == 'rm' && substr($str ,0, 4) !== "\x2ERMF") || ($ext == 'exe' && substr($str ,0, 2) !== "MZ") || (in_array($ext,array('doc','xls','ppt')) && substr($str ,0, 4) !== "\xD0\xCF\x11\xE0")) {
  $this->log .= $file['name'] . "文件类型与文件内容不符合。\n";
  }elseif((!empty($this->extensionFileFormat) && in_array($ext,$this->extensionFileFormat)) || (empty($this->extensionFileFormat) && (in_array($ext,$this->ImageFileFormat) || in_array($ext,$this->OtherFileFormat)))) {
  $this->filelist[$key] = $file;
  }else{
  $this->log .= $file['name'] . "不符合上传文件的类型。\n";
  @unlink($file['tmp_name']);
  }
  }
  }
  }
  /*生成上传目录

• */
  private function makeDirectory() {
  $directoryName = str_replace("\\","/", $this->savePath);
  $dirNames = explode('/', $directoryName);
  $total = count($dirNames);
  $temp = '';
  for($i=0; $i<$total; $i++)
  {
  $temp .= $dirNames[$i].'/';
  if (!is_dir($temp))
  {
  $oldmask = @umask(0);
  if (!@mkdir($temp, 0777)) return false;
  @umask($oldmask);
  }
  };
  if(is_dir($this->savePath)) {
  return true;
  } else {
  return false;
  };
  }
  }
  ?>