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我有PHP代码从MySQL数据库downloding文件,但是当我点击链接会出现以下错误,下载犯错
“警告:不能更改头信息 - 头已经发出通过 (输出开始于/home/somelocation/loc/coks/getfiles.php:2)“。
<?php
// Make sure an ID was passed
if(isset($_GET['id'])) {
// Get the ID
$id = intval($_GET['id']);
// Make sure the ID is in fact a valid ID
if($id <= 0) {
die('The ID is invalid!');
}
else {
// Connect to the database
$dbLink = new mysqli('localhost', 'username', '[email protected]', 'Databases');
if(mysqli_connect_errno()) {
die("MySQL connection failed: ". mysqli_connect_error());
}
// Fetch the file information
$query = "
SELECT `mime`, `name`, `size`, `data`
FROM `resume_file`
WHERE `id` = {$id}";
$result = $dbLink->query($query);
if($result) {
// Make sure the result is valid
if($result->num_rows == 1) {
// Get the row
$row = mysqli_fetch_assoc($result);
// Print headers
header("Content-Type: ". $row['mime']);
header("Content-Length: ". $row['size']);
header("Content-Disposition: attachment; filename=". $row['name']);
// Print data
echo $row['data'];
}
else {
echo 'Error! No image exists with that ID.';
}
// Free the mysqli resources
@mysqli_free_result($result);
}
else {
echo "Error! Query failed: <pre>{$dbLink->error}</pre>";
}
@mysqli_close($dbLink);
}
}
else {
echo 'Error! No ID was passed.';
}
?>
什么是在上面的代码中的问题,请,谁能帮助我。 注意:请检查第32,33,34行。
谢谢
谁不喜欢我的文章的一个开始,请通过链接.. –
固定。谢谢你。 – Sathishkumar