ZipArchive is missing the NOT_SERIALIZABLE flag

[arnaud-lb]

Description

The following code:

$a = new ZipArchive();
var_dump($a->open('test.zip', ZipArchive::CREATE));
var_dump($a->addFromString('test.php', '<?php'));
var_dump($a->numFiles);

$a = unserialize(serialize($a));
echo "# Num files after serialize:\n";
var_dump($a->numFiles);

Resulted in this output:

[...]
# Num files after serialize:
int(0)

But I expected this output instead:

Fatal error: Uncaught Exception: Serialization of 'ZipArchive' is not allowed

Found by @nicolas-grekas

PHP Version

*

Operating System

No response