PHP5+UTF8多文件上传类

根据需要写了个PHP5+UTF8环境的文件上传类,支持多文件上传,并对常用文件的类型进行MIME检测.

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=newupfile(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)2008millken@gmail.com
//====================================================
if(!defined('OK'))exit(__FILE__.'AccessDenied');
classupfile{
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
*/
publicfunction__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)$maxSize文件的最大字节数，默认为0不限制上传大小
*/
publicfunctionupload($files,$maxSize=0){
$this->maxSize=is_numeric($maxSize)?$maxSize:0;
if(isset($files)&&is_array($files)){
if(is_array($files['name'])){
foreach($filesas$key=>$var){
foreach($varas$id=>$val){
$attachments[$id][$key]=$val;
}
}
}else{
$attachments[]=$files;
}
}
self::check_file_type($attachments);
if(empty($this->filelist)){
$this->log.="待上传的文件列表为空。\n";
returnarray();
}
if(!self::makeDirectory()||!@is_writable($this->savePath)){
$this->log.=$this->savePath."不能创建或其权限为不可写。\n";
returnarray();
}
$filearray=array();
foreach($this->filelistas$k=>$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)$files文件数组
*/
privatefunctioncheck_file_type($files){
$this->filelist=array();
foreach($filesas$key=>$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
*
*/
privatefunctionmakeDirectory(){
$directoryName=str_replace("\\","/",$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))returnfalse;
@umask($oldmask);
}
};
if(is_dir($this->savePath)){
returntrue;
}else{
returnfalse;
};
}
}

?>