Download zip file in PHP not working - php

Question

Following is my code to download zip file using PHP.
function create_zip($files, $file_name, $overwrite = false) {
foreach ($files as $imglink) {
$img = file_get_contents($imglink);
$destination_path = $_SERVER['DOCUMENT_ROOT'] . 'demoproject/downloads/' . time() . '.jpg';
file_put_contents($destination_path, $img);
$imgFiles[] = $destination_path;
}
if (file_exists($file_name) && !$overwrite) {
return false;
}
$valid_files = array();
if (is_array($imgFiles)) {
foreach ($imgFiles as $file) {
$valid_files[] = $file;
}
}
if (count($valid_files)) {
$zip = new ZipArchive();
if ($zip->open($file_name, $overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
echo "Sorry ZIP creation failed at this time";
}
foreach ($valid_files as $file) {
$zip->addFile($file, pathinfo($file, PATHINFO_BASENAME));
}
$count = $zip->numFiles;
$resultArr = array();
$resultArr['count'] = $count;
$resultArr['destination'] = $file_name;
$filename = $file_name;
$filepath = $_SERVER['DOCUMENT_ROOT'] . 'demoproject/';
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"" . $filename . "\"");
header("Content-Transfer-Encoding: binary");
header("Content-Length: " . filesize($filepath . $filename));
ob_end_flush();
#readfile($filepath . $filename);
} else {
return false;
}
}
Here the $filename and $filepath containing the name and path of zip file respectively.
Ex:
echo $filepath.$filename;
Output : D:/wamp/www/demoproject/1357198557.zip
The issue is it displaying download window but showing the folder size 0 byte. I am using windows7. See image below :

Answer 1

Can you try adding this, Make sure you got proper filesize
$mm_type="application/octet-stream";
header("Content-Type: " . $mm_type);
header("Content-Length: " .(string)(filesize($fullpath)) );