<?php

$zipname = 'bk.zip';
function folderToZip($folder, &$zipFile, $exclusiveLength)
{
	set_time_limit(0);
	$handle = opendir($folder);
	while (false !== $f = readdir($handle))
	{
		if ($f != '.' && $f != '..')
		{
			$filePath = "$folder/$f";
			$localPath = substr($filePath, $exclusiveLength);
			if (is_file($filePath))
			{
				$zipFile->addFile($filePath, $localPath);
			}
			elseif (is_dir($filePath))
			{
				$zipFile->addEmptyDir($localPath);
				folderToZip($filePath, $zipFile, $exclusiveLength);
			}
		}
	}
	closedir($handle);
}

function zipDir($sourcePath, $outZipPath)
{
	$pathInfo = pathInfo($sourcePath);
	$parentPath = $pathInfo['dirname'];
	$dirName = $pathInfo['basename'];

	$z = new ZipArchive();
	$z->open($outZipPath, ZIPARCHIVE::CREATE);
	$z->addEmptyDir($dirName);
	folderToZip($sourcePath, $z, strlen("$parentPath/"));
	$z->close();
}
zipDir('.', $zipname);

header('Content-Type: application/zip');
header("Content-Disposition: attachment; filename='bk.zip'");
header('Content-Length: ' . filesize($zipname));
header("Location: bk.zip");

?>