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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
- $filename = $_GET['file']; //Get the fileid from the URL
- // Query the file ID
- $query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename));
- $sql = mysql_query($query);
- if(mysql_num_rows($sql) > 0){
- $row = mysql_fetch_array($sql);
- // Set some headers
- header("Pragma: public");
- header("Expires: 0");
- header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
- header("Content-Type: application/force-download");
- header("Content-Type: application/octet-stream");
- header("Content-Type: application/download");
- header("Content-Disposition: attachment; filename=".basename($row['FileName']).";");
- header("Content-Transfer-Encoding: binary");
- header("Content-Length: ".filesize($row['FileName']));
-
- @readfile($row['FileName']);
- exit(0);
- }else{
- header("Location: /");
- exit;
- }
- ?>
files.php
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