PHP zip file creation

zipFiles.php

<?php

/*
 * ----------------------------------------------------------------------------
 * "THE BEER-WARE LICENSE" (Revision 42):
 * <[email protected]> wrote this file. As long as you retain this notice you
 * can do whatever you want with this stuff. If we meet some day, and you think
 * this stuff is worth it, you can buy me a beer in return Periklis Ntanasis
 * ----------------------------------------------------------------------------
 */

function zipFiles($destination,$files=array(),$file_names=array(),$overwrite=true) {
	if(file_exists($destination) && !$overwrite)
		return false;
	$zip = new ZipArchive();
	$res = $zip->open($destination,$overwrite ? ZipArchive::OVERWRITE : ZipArchive::CREATE);
	if(!$res)
		return false;
	if(count($file_names)>0)
		$with_names=true;
	else
		$with_names=false;
	for($i=0;$i<count($files);$i++)
	{
		if($with_names)
			$zip->addFile($files[$i],$file_names[$i]);
		else
			$zip->addFile($files[$i]);
	}
	$zip->close();
	return file_exists($destination);		
}

?>