makeZipTest.PHP：

<?PHP

$destination = __DIR__.'/makeZipTest.zip';
$fileToZip = __DIR__.'/hello.txt';

$zip = new ZipArchive();
if (true !== $zip->open($destination,ZIPARCHIVE::OVERWRITE)) {
    die("Problem opening zip $destination");
}
if (!$zip->addFile($fileToZip)) {
    die("Could not add file $fileToZip");
}
echo "numfiles: " . $zip->numFiles . "\n";
echo "status: " . $zip->status . "\n";
$zip->close();

zip已创建,但为空.然而,没有触发任何错误.

出了什么问题？