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Subject: Re: [PHP-DEV] Built-in classes that cannot be serialized
From: sebastian@php.net (Sebastian Bergmann)

Am 26.11.2018 um 13:35 schrieb Nikita Popov:
>> If I can rely on classes to throw an exception when serialize() is
>> performed (be it through zend_class_serialize_deny or in __sleep())
>> then, yes, I can just try it.
> 
> I believe you can rely on this. Not on any specific exception type, but the
> fact that it will throw.

Good to know, thanks.

> I've switched CURLFile, PDO and PDOStatement over to use serialize_deny. I
> couldn't find other classes in bundled extensions that were manually
> throwing on serialization.

Thanks!

> that contains a class that cannot be serialized. Serializability is not a
> property of a single class or object, it's a property of the whole object
> graph that is being serialized.

I know: 
https://github.com/sebastianbergmann/global-state/blob/master/src/Snapshot.php#L360 
;-)

Best,
Sebastian