Zip archive Problem

[Xinil]

I have a project for a client that wants me to store PDF files in a zip file (5.2 now comes with zip libraries embedded). I've got the zip libraries to work, but for some reason when I create the zip file, I get a gibberish string appended to the end of the file name. Example, when I execute this code:

 

$zip = new ZipArchive;
$res = $zip->open('test.zip', ZipArchive::CREATE);
if ($res === TRUE)
{
$zip->addFile('testfilephp.txt', 'newname.txt');
    $zip->close();
    echo 'ok';
}
else
{
    echo 'failed';
}

 

When that's executed, for some reason, two files are created named: test.zip.a03440, and test.zip.b03440. If I rename those files to test.zip, I can read the archives just fine.

 

I don't understand why it's creating this weird code on the end of the file name, any help is appreciated.