文件下载不起作用php
[英]file download not working php
问题描述
I need your suggestions on this issue.. my intention is, i have a word doc uploaded in db as BLOB content... and i have it displayed as a link in my page..
我需要你对这个问题的建议。
when i click on the link, the word doc should be downloaded... i get the below error msg, upon clicking the link.. Warning: Cannot modify header information - headers already sent by (output started at /home/stthohuu/public_html/sp/archive_newsletter.php:8) in当我点击链接时，应该下载 doc 这个词...我收到以下错误消息，点击链接后..警告：无法修改标题信息 - 标题已经发送（输出开始于 /home/stthohuu/public_html /sp/archive_newsletter.php:8) 在
see code below...看下面的代码...
</head>
<body>
<?php
//database connection
$con = mysql_connect('localhost', 'abc', 'abc') or die(mysql_error());
//select database
$db = mysql_select_db('stthohuu_church', $con);
$query = "SELECT id, name FROM newsletter order by id desc";
$result = mysql_query($query) or die('Error, query failed');
if(mysql_num_rows($result) == 0)
{
echo "No files found in DB<br>";
}
else
{
while(list($id, $name) = mysql_fetch_array($result))
{
?>
<a href="archive_newsletter.php?id=<?php echo urlencode($id);?>"
><?php echo urlencode($name);?></a> <br>
<?php
}
}
mysql_close();
?>
</body>
</html>
<?php
if(isset($_GET['id']))
{
// if id is set then get the file with the id from database
$con = mysql_connect('localhost', 'abc', 'abc') or die(mysql_error());
$db = mysql_select_db('stthohuu_church', $con);
$id = $_GET['id'];
$query = "SELECT name, type, size, content " .
"FROM newsletter WHERE id = '$id'";
$result = mysql_query($query) or die('Error, query failed');
list($name, $type, $size, $content) = mysql_fetch_array($result);
header("Content-length: $size");
header("Content-type: $type");
header("Content-Disposition: attachment; filename=$name");
ob_clean();
flush();
echo $content;
mysql_close();
exit;
}
?>
this also works in Xampp but NOT in web server :(这也适用于 Xampp 但不适用于 Web 服务器 :(
1 个解决方案
解决方案1
2 已采纳 2014-04-20 10:33:29
header() must be before any output. header() 必须在任何输出之前。 Also about - you need to start the output buffering(ob_start()) before you call ob_clean().还关于 - 您需要在调用 ob_clean() 之前启动输出缓冲(ob_start())。
<?php
if(isset($_GET['id']))
{
ob_start();
// if id is set then get the file with the id from database
$con = mysql_connect('localhost', 'abc', 'abc') or die(mysql_error());
$db = @mysql_select_db('stthohuu_church', $con);
$id = $_GET['id'];
$query = "SELECT name, type, size, content " .
"FROM newsletter WHERE id = '$id'";
$result = mysql_query($query) or die('Error, query failed');
list($name, $type, $size, $content) = mysql_fetch_array($result);
header("Content-length: $size");
header("Content-type: $type");
header("Content-Disposition: attachment; filename=$name");
ob_clean();
echo $content;
mysql_close();
exit;
}
?>
</head>
<body>
<?php
//database connection
$con = mysql_connect('localhost', 'abc', 'abc') or die(mysql_error());
//select database
$db = mysql_select_db('stthohuu_church', $con);
$query = "SELECT id, name FROM newsletter order by id desc";
$result = mysql_query($query) or die('Error, query failed');
if(mysql_num_rows($result) == 0)
{
echo "No files found in DB<br>";
}
else
{
while(list($id, $name) = mysql_fetch_array($result))
{
?>
<a href="archive_newsletter.php?id=<?php echo urlencode($id);?>"
><?php echo urlencode($name);?></a> <br>
<?php
}
}
mysql_close();
?>
</body>
</html>
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