Mongodb-PHP：文件下载不下载预期的文件

Question

我正在使用MongoDB和php。我有协议下载选项，当用户点击用户时获得下载的协议。在点击我已经浏览到脚本，在PHP文件下载代码是有 代码

$mongoDbA = $mongoDb->findOne(array("agency_id" => new MongoId($_GET['id']))); 
$filename = '../../images/upload/'.$mongoDbA['file']; 

if (file_exists($filename)) 
{ 
header('Content-Description: File Transfer'); 
header('Content-Type: text/pdf'); 
header('Content-Disposition: attachment; filename='.basename($filename)); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate'); 
header('Pragma: public'); 
header('Content-Length: ' . filesize($filename)); 
readfile($filename); 
exit; 
} 

我已经允许只上传PDF文件，所以只有PDF文件存在于数据库

当我点击则给我错误&给我白色有没有扩展名的文件&大小是1 kb几乎....发生了什么???

Answer 1

$filename = './images/upload/'.$mongoDbA['file']; 

    $fileinfo = pathinfo($filename); 
    $sendname = $fileinfo['filename'] . '.' . $fileinfo['extension']; 

    header('Content-Type: application/pdf'); 
    header('Content-Disposition: attachment; filename="$sendname"'); 
    header('Expires: 0'); 
    header('Cache-Control: must-revalidate'); 
    header('Pragma: public'); 
    header('Content-Length: ' . filesize($filename)); 
    readfile($filename); 
    exit;