FileOprSer.class.php(文件上传与下载类)

<?php
        
    class FileOperSer{
        //文件下载
    function fileDown($file_name){
        //iconv()把编码改变
        //原因 php文件函数，比较古老，需要对中文转码 gb2312
        $file_name=iconv("utf-8","gb2312",$file_name);
    //绝对路径  
    $file_path=$_SERVER['DOCUMENT_ROOT'].$file_name;
    //打开图片
    
    if(!file_exists($file_path)){
      
        echo "没有这个图片";
        return;
    }
  
     $fp=fopen($file_path,"r");
     //获取图片大小
    $file_size=filesize($file_path);
        if($file_size>10*1024*1024){
            
            echo "过大";
            return;
        }
    //返回的文件
        header("Content-type: application/octet-stream");
        //按照字节大小返回
        header("Accept-Ranges: bytes");
        //返回文件大小
        header("Accept-Length: $file_size");
        //客户端的弹出对话框，对应的文件名
        header("Content-Disposition: attachment; filename=".$file_name);

        //向客户端回送数据
    
        $buffer=1024;
       
        $file_count=0;
        while (!feof($fp) && ($file_size-$file_count)>0){
            $file_data=fread($fp, $buffer);
            //统计字节
            $file_count+=$buffer;
            //把部分数据回送给浏览器;
            echo $file_data;
        }

        //关闭文件
        fclose($fp);

    }
       //文件上传
    public function fileUp($username,$fileintro,$fileService){
        //获取文件类型
        $fileType=$_FILES['myfile']['type'];
        if($fileType!="image/jpg" && $fileType!="image/jpeg"){
            echo "文件只能上传jpg图片类型";
            //header("refresh:3;upload.php");
            exit();
        }
        //获取文件的大小
        $file_size=$_FILES['myfile']['size'];
        if($file_size>2*1024*1024){
            echo "不能上传大于2M的文件";
            exit();
        }
         
        
        if(is_uploaded_file($_FILES['myfile']['tmp_name'])){
            
            //把路径赋值到变量中
            $upload_file=$_FILES['myfile']['tmp_name'];
          
            $user_path="/upfile/up/".$username;
           
            $user_path=iconv("utf-8","gb2312", $user_path);
           
            if(!file_exists($_SERVER["DOCUMENT_ROOT"].$user_path)){
                mkdir($_SERVER["DOCUMENT_ROOT"].$user_path);
            }
            //把中文文件名进行编码
            //$fileName=iconv("utf-8","gb2312",$_FILES['myfile']['name']);
            //随机产生
            $file_true_pos=$_FILES['myfile']['name'];
            $move_to=$user_path."/".date("YmdHis",time()).rand(1,100).
            substr($file_true_pos,strrpos($file_true_pos,"."));
            $move_to_file= $_SERVER['DOCUMENT_ROOT'].$move_to;
    
            //  改变路径，如果成功传入信息
            if (move_uploaded_file($upload_file,$move_to_file)){
    
                $move_to= iconv("gb2312", "utf-8", $move_to);
                if($fileService->addFiledb($move_to, $username, $fileintro)==1){
                    header("Location:ok.php");
                     
                    exit();
                }else{
                    header("Location:error.php");
                    exit();
                }
    
            }else{
                //header("refresh:3;upload.php");
                echo "上传失败";
                exit();
            }
        }else{
            // header("refresh:3;upload.php");
            echo "上传失败";
            exit();
        }
    }
}
    
?>