How to download image file by force download - php

Question

I am trying to download image file in CI but getting error when I open download image file. Need help :(
$file_name = $_GET['file_name'];
$file_path = "./ups_printimages/".$file_name;
if(file_exists($file_path))
{
$this->load->helper('download');
$data = file_get_contents($file_path); // Read the file's contents
$name = 'ups_label.png';
force_download($name, $data);
}
else
{
echo "file does not exist";
}

Answer 1

GOD. Found out the solution :)
if(!file)
{
File doesn't exist, output error
die('file not found');
}
else
{
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
ob_clean();
flush();
readfile($file);
exit;
}

Answer 2

Use header to force download. Use the code below
$file_name = $_GET['file_name'];
$file_path = "./ups_printimages/".$file_name;
if(file_exists($file_path))
{
header('Content-Type: image/jpeg');
header("Content-Transfer-Encoding: Binary");
header("Content-disposition: attachment; filename=\"" . basename($file_name) . "\"");
readfile($file_path);
}
else
{
echo "file does not exist";
}
Hope this helps yoiu