php - Downloaded pdf file unable to be opened - improper encoding? -


i'm unsure how approach solving problem. have link when clicked downloads file users machine. file pdf. if copy , paste file onto desktop , open copy, works fine. yet when user downloads , tries open, this:

enter image description here

here code:(fyi: have validation on filename before this..)

$file_name = $dat->filename; //'file.avi';     $file_url = $dat->path . $dat->url . $filename;      header('content-type:'. $dat->type);     header("content-disposition: attachment; filename=\"" . $file_name . "\"");     header("filename=\"" . $file_name . "\"");     readfile($file_url);     exit;

i have tried multiple headers nothing seems work. doing wrong encoding? seems me file valid , should simple copy users machine copy made locally worked fine.

update

i opened file per marcin's suggestion, in sublime. get.. no body?

<!doctype html> <html lang="en">     <head>     <meta charset="utf-8">     <meta http-equiv="x-ua-compatible" content="ie=edge">     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">     <link rel="stylesheet" type="text/css" href="/assets/jquery/jquery-ui-1.12.1/jquery-ui.min.css">     <script src="/assets/jquery/jquery-3.2.1.min.js"></script>     <script src="/assets/jquery/jquery-ui-1.12.1/jquery-ui.min.js"></script>     <script src="/assets/pdfobject/pdfobject.js"></script>     <style>         body{             overflow: hidden;         }         .pdfobject-container {             height: 99vh;             overflow: hidden;         }     </style>     <title></title> </head>     <body>

i'd open file in i.e. text editor or binary editor , see what's inside. blind guess you find there sort of i.e. php notice/error message or polluting data other way.


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