php文件下载

Question

php下载

Answer 1

    $name=$_GET['name'];
    $url=$_GET['url'];
    $filesize=filesize($url.$name);这三句要放在上面，否则 header("Content-Disposition:filename=".$name); 会拿不到$name导致出notice.改成这样if(!empty($_GET)){
    $name=$_GET['name'];
    $url=$_GET['url'];
    $filesize=filesize($url.$name);    header("Content-type: application/octet-stream ; charset=utf-8"); //输出类型 
    header("Content-Disposition:filename=".$name);
    header("Accept-Ranges: bytes"); //文件单位
    header("Accept-Length:".$filesize); //文件大小
    header("Content-Disposition: attachment; filename=".$name);//下载时显示的名字 
    $f=fopen($url.$name, "r");
    $buffer=1024;
    $downsize=0;
    $str="";
    while(!feof($f) && ($filesize-$downsize)>0){
        $downsize+=$buffer;
        echo fread($f,$buffer);
 
    }
    //echo $str;
    fclose($f);
 
}