php获取本地电脑文件后下载另存为

// 文件将被称为 downloaded.pdf
header(“Content-Disposition:attachment;filename=log.text”);

// PDF 源在 original.pdf 中
readfile(“ptindex_user_profilebasc.html”);

?>

 $item=trim($_GET['fileName']).".txt";  
    $abs_item='/usr/home/文件夹名称/文件夹名称/文件夹名称/'.$item;  
    $browser='IE';  
    header('Content-Type: '.(($browser=='IE' || $browser=='OPERA')?  
        'application/octetstream':'application/octet-stream'));  
    header('Expires: '.gmdate('D, d M Y H:i:s').' GMT');  
    header('Content-Transfer-Encoding: binary');  
    header('Content-Length: '.filesize($abs_item));  
    if($browser=='IE') {  
        header('Content-Disposition: attachment; filename="'.$item.'"');  
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');  
        header('Pragma: public');  
    } else {  
        header('Content-Disposition: attachment; filename="'.$item.'"');  
        header('Cache-Control: no-cache, must-revalidate');  
        header('Pragma: no-cache');  
    }  
@readfile($abs_item); 

echo httpcopy("/baidu_sylogo1.gif");

function httpcopy($url, $file="", $timeout=60) {
    $file = empty($file) ? pathinfo($url,PATHINFO_BASENAME) : $file;
    $dir = pathinfo($file,PATHINFO_DIRNAME);
    !is_dir($dir) && @mkdir($dir,0755,true);
    $url = str_replace(" ","%20",$url);

    if(function_exists('curl_init')) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        $temp = curl_exec($ch);
        if(@file_put_contents($file, $temp) && !curl_error($ch)) {
            return $file;
        } else {
            return false;
        }
    } else {
        $opts = array(
            "http"=>array(
            "method"=>"GET",
            "header"=>"",
            "timeout"=>$timeout)
        );
        $context = stream_context_create($opts);
        if(@copy($url, $file, $context)) {
            //$http_response_header
            return $file;
        } else {
            return false;
        }
    }
}
?>