August 6, 2012 5:06 am

Force to download a file in PHP

In this tutorial we have simple script to download files by force instead of open it in browser window. This is useful for common file types that would normally be displayed in a browser .csv, .php and all types of images( gif, png, jpg etc. ).

[wpdm_file id=7]

PHP Code

Simple PHP function function.php

function output_file($Source_File, $Download_Name, $mime_type='')
$Source_File = path to a file to output
$Download_Name = filename that the browser will see 
$mime_type = MIME type of the file (Optional)
 if(!is_readable($Source_File)) die('File not found or inaccessible!');

 $size = filesize($Source_File);
 $Download_Name = rawurldecode($Download_Name);

 /* Figure out the MIME type (if not specified) */
    "pdf" => "application/pdf",
    "csv" => "application/csv",
    "txt" => "text/plain",
    "html" => "text/html",
    "htm" => "text/html",
    "exe" => "application/octet-stream",
    "zip" => "application/zip",
    "doc" => "application/msword",
    "xls" => "application/",
    "ppt" => "application/",
    "gif" => "image/gif",
    "png" => "image/png",
    "jpeg"=> "image/jpg",
    "jpg" =>  "image/jpg",
    "php" => "text/plain"

     $file_extension = strtolower(substr(strrchr($Source_File,"."),1));
     if(array_key_exists($file_extension, $known_mime_types)){
     } else {

 @ob_end_clean(); //off output buffering to decrease Server usage

 // if IE, otherwise Content-Disposition ignored
  ini_set('zlib.output_compression', 'Off');

 header('Content-Type: ' . $mime_type);
 header('Content-Disposition: attachment; filename="'.$Download_Name.'"');
 header("Content-Transfer-Encoding: binary");
 header('Accept-Ranges: bytes');

 header("Cache-control: private");
 header('Pragma: private');
 header("Expires: Thu, 26 Jul 2012 05:00:00 GMT");

 // multipart-download and download resuming support
    list($a, $range) = explode("=",$_SERVER['HTTP_RANGE'],2);
    list($range) = explode(",",$range,2);
    list($range, $range_end) = explode("-", $range);
    if(!$range_end) {
    } else {

    $new_length = $range_end-$range+1;
    header("HTTP/1.1 206 Partial Content");
    header("Content-Length: $new_length");
    header("Content-Range: bytes $range-$range_end/$size");
 } else {
    header("Content-Length: ".$size);

 /* output the file itself */
 $chunksize = 1*(1024*1024); //you may want to change this
 $bytes_send = 0;
 if ($Source_File = fopen($Source_File, 'r'))
    fseek($Source_File, $range);

    while(!feof($Source_File) && 
        (!connection_aborted()) && 
        $buffer = fread($Source_File, $chunksize);
        print($buffer); //echo($buffer); // is also possible
        $bytes_send += strlen($buffer);
 } else die('Error - can not open file.');


Simple PHP file index.php

output_file($file_path, 'phpgang.csv', 'application/csv');

Author Huzoor Bux

I am Huzoor Bux from Karachi (Pakistan). I have been working as a PHP Developer from last 5+ years, and its my passion to learn new things and implement them as a practice. Basically I am a PHP developer but now days exploring more in HTML5, CSS and jQuery libraries.

Tutorial Categories:

One response to “Force to download a file in PHP”

  1. Mohd Farhan Rizwan says:

    Asslamoalaikum Thank you so much Hazrat Huzoor Bux sahab i really appreciate. Thank you once again..:)

Leave a Reply

Your email address will not be published. Required fields are marked *