php通过加http响应头强制用户下载

php中可以通过设置header的content-type，强制用户下载内容，而非直接在浏览器中打开，如下代码实现：

downloadFile.php

1. $filename = $_GET['file']; //Get the fileid from the URL
2. // Query the file ID
3. $query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename));
4. $sql = mysql_query($query);
5. if(mysql_num_rows($sql) > 0){
6. $row = mysql_fetch_array($sql);
7. // Set some headers
8. header("Pragma: public");
9. header("Expires: 0");
10. header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
11. header("Content-Type: application/force-download");
12. header("Content-Type: application/octet-stream");
13. header("Content-Type: application/download");
14. header("Content-Disposition: attachment; filename=".basename($row['FileName']).";");
15. header("Content-Transfer-Encoding: binary");
16. header("Content-Length: ".filesize($row['FileName']));
18. @readfile($row['FileName']);
19. exit(0);
20. }else{
21. header("Location: /");
22. exit;
23. }
24. ?>

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files.php

1. Download

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php, http