又花了半天时间写了个php上传类解决方法

//up_class.php


     * $upFolder(保存到服务器的文件夹);

     * $isRename(对上传文件重命名，值 有 y|n );

     * $reType(上传成功后返回的值：n是返回文件名,pn:返回路径和文件名,j:返回js[待扩展]);

     * $upExt(要上传的文件分类,因为在不同的表单要限制不同的上传文件类型，比如 A表单只能上传图片，B表单只能上伟压缩包);

     * $maxSize(限制上传的文件大小)

     * @author:256kb
     * @2012-5-1
     */
    public function __construct($inputFile , $upExt = 0 , $reType = 'pn' , $upFolder = 'upload/' , $isRename = 'y' , $maxSize = 10485760){
        $this->inputFile = $inputFile;
        $this->reType = $reType;
        $this->upMaxSize = $maxSize;
        $this->allowFile = $upExt;
        $this->upFolder = $upFolder;
        $this->isReName = $isRename;
        //$this->errorInt = -1;
    }
    
    public function upFile(){
        $_file_arr = $_FILES[$this->inputFile];
        $this->errorInt = $_file_arr['error'];
        if(is_uploaded_file($_file_arr['tmp_name'])){
            if($_file_arr['tmp_name']){
                $this->tmpName = $_file_arr['name'];
                $this->upMaxSize = $_file_arr['size'];
                $this->fileType = $_file_arr['type'];
                $this->tmpPath = $_file_arr['tmp_name'];
                $this->fileSize = $_file_arr['size'];
                if($this->upMaxSize > $this->upMaxSize){
                    $this->errorInt = 6    ;    //大小超出网站限制
                }
                
                if(!$this->isAllow()){
                    $this->errorInt = 8    ;    //系统不允许此类型文件
                }
                
                if($this->isReName=='y'){
                    $this->savePath = $this->upFolder.$this->getFolder().'/'.$this->getNewName() ;
                    $this->endFileName = $this->getNewName();
                }else{
                    $this->savePath = $this->upFolder.$this->getFolder().'/'.$this->tmpName ;
                    $this->endFileName = $this->tmpName;
                }
                //echo $this->errorInt;
                if(!$this->errorInt >= 1){
                    move_uploaded_file($this->tmpPath,$this->savePath);
                }
                
            }
        }
    }
    
    public function getFileUrl(){
        switch($this->reType){
            case 'n':
                return $this->endFileName;
            break;
            case 'pn':
                return $this->savePath;
            break;
            case 'js':
                return "";
            break;
            default:
                return $this->savePath;
        }
    }
    
    //获得新文件名
    public function getNewName(){
        return substr($this->tmpName,1,strrpos($this->tmpName,".")-1).'_'.mktime().'.'.$this->getFileExt();
    }
    
    public function upStatus(){
        //echo $this->errorInt;
        switch ($this->errorInt){
            case 1:
                return '超过了文件大小php.ini中限制大小';
            break;
            case 2:
                return '超过了文件大小MAX_FILE_SIZE 选项指定的值';
            break;
            case 3:
                return '文件只有部分被上传';
            break;
            case 4:
                return '没有文件被上传';
            break;
            case 5:
                return '上传文件大小为0';
            break;
            case 6:
                return '大小超出网站限制';
            break;
            case 7:
                return '网站内没有指定这种上传类型';
            break;
            case 8:
                return '系统不允许此类型文件';
            case 9:
                return '创建目录失败！';
            break;
        }
    }
    
    private function isAllow(){
        $allow = array(
                0 => array('image/jpg','image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image/x-png','application/x-zip-compressed','application/octet-stream'),
                1 => array('image/jpg','image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image/x-png'),
                2 => array('application/x-zip-compressed','application/octet-stream'),
                3 => array('','',''),
                4 => array('','','')
                );
        if($this->allowFile > count($allow)-1){
            $this->errorInt = 7;    //网站内没有指定这种上传类型
        }else{
            if(in_array($this->fileType, $allow[$this->allowFile])){
                return true;
            }else{
                return false;
            }
        }
    }
    
    public function getFileExt(){    //获得文件扩展名
        return strtolower(substr($this->tmpName,strrpos($this->tmpName,".")+1));
    }
    
    private function getFolder(){    //获得并自动创建相应文件夹
        if(strpos('|rar|zip|7z|iso|','|'.$this->getFileExt().'|')>=0){
            $_folder = 'rar';
        }elseif(strpos('|gif|jpeg|jpg|png|bmp|pjpeg|psd|','|'.$this->getFileExt().'|')>=0){
            $_folder = 'img';
        }elseif(strpos('|rm|rmvb|avi|mp4|swf|flv|wmv|','|'.$this->getFileExt().'|')>=0){
            $_folder = 'vide';
        }elseif(strpos('|doc|txt|xls|mdb||','|'.$this->getFileExt().'|')>=0){
            $_folder = 'doc';
        }else{
            $_folder = 'other';
        }
        if(!file_exists($this->upFolder.$_folder)){
            if(!mkdir($this->upFolder.$_folder)){
                $this->errorInt = 9;    //创建目录失败
            }
        }
        return $_folder;
    }
    
}