Re: Re: [RFC] Add WeakMap

On 12.12.19 18:13, Nikita Popov wrote:

On Tue, Dec 10, 2019 at 12:03 PM Dennis Birkholz <php@dennis.birkholz.biz> wrote:

But my just want to repeat my main concern: buildin data structures that are not serializable are a real problem for users that use serialization extensively. Maybe the solution to that problem is a method to check whether a provided object graph can be serialized (which may not be possible due to throwing an exception in __sleep() or something like that), some way to ignore unserializable elements or some way to register callback methods to handle unserializable elements.

I'm must be missing something obvious here: Isn't this a reliable way to detect whether an object graph is serializable? try {

     $serialized = serialize($value);

} catch (\Throwable $e) {

     // not serializable

}

Checking whether the serialization process worked is different from checking beforehand whether an object graph is serializable as it makes it a lot easier to display a meaningful error message. Something like the Serializable interface in Java. But that seems to not be the PHP way so far, I will have to think about an RFC for a second parameter for serialize() that accepts a callback that can "serialize" objects/variables that fail to serialize themselves... Greets Dennis