php文件下载解决办法-PHP Tutorial-php.cn

php文件下载解决办法

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Release： 2016-06-13 12:16:19

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php文件下载
下面是我在网上的找的代码，自己改了下：

down_file.php:

<?php<br /><br />if(!empty($_GET)){<br /><br />    header("Content-type: application/octet-stream ; charset=utf-8"); //输出类型 <br />	header("Content-Disposition:filename=".$name);<br />	header("Accept-Ranges: bytes"); //文件单位<br />	header("Accept-Length:".$filesize); //文件大小<br />	header("Content-Disposition: attachment; filename=".$name);//下载时显示的名字<br />$name=$_GET['name'];<br />	$url=$_GET['url'];<br /><br />	$f=fopen($url.$name, "r");<br />	$buffer=1024;<br />	$filesize=filesize($name);<br />	$downsize=0;<br />	$str="";<br />	while(!feof($f) && ($filesize-$downsize)>0){<br />		$downsize+=$buffer;<br />		echo fread($f,$buffer);<br /><br />	}<br />	//echo $str;<br />	fclose($f);<br /><br />}<br /><br />?>

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html页面：

<!DOCTYPE html><br /><html><br />	<head><br />		<meta charset="utf-8"><br />		<title>Document</title><br />	</head><br />	<body><br />		<br />	<a href="down_file.php?name=a.jpg&url=./img/">下载a.jpg</a><br /><br />	</body><br /></html>

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目的是下载a.jpg,
问题是点击后弹出窗口下载的是down_file.php而不是a.jpg。。如下图

求指点一下，能给个能用的代码更好了
------解决思路----------------------
$name=$_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

<br />if(!empty($_GET)){<br />    $name=$_GET['name'];<br />    $url=$_GET['url'];<br />    $filesize=filesize($url.$name);<br /><br />    header("Content-type: application/octet-stream ; charset=utf-8"); //输出类型 <br />    header("Content-Disposition:filename=".$name);<br />    header("Accept-Ranges: bytes"); //文件单位<br />    header("Accept-Length:".$filesize); //文件大小<br />    header("Content-Disposition: attachment; filename=".$name);//下载时显示的名字<br /><br /> <br />    $f=fopen($url.$name, "r");<br />    $buffer=1024;<br />    $downsize=0;<br />    $str="";<br />    while(!feof($f) && ($filesize-$downsize)>0){<br />        $downsize+=$buffer;<br />        echo fread($f,$buffer);<br /> <br />    }<br />    //echo $str;<br />    fclose($f);<br /> <br />}<br />

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