This prevents serialization and unserialization of a class and its
children in a way that does not depend on the zend_class_serialize_deny
and zend_class_unserialize_deny handlers that will be going away
in PHP 9 together with the Serializable interface.
In stubs, `@not-serializable` can be used to set this flag.
This patch only uses the new flag for a handful of Zend classes,
converting the remainder is left for later.
Closes GH-7249.
Fixes bug #81111.
Instead of manually implementing this, use the standard mechanism.
This has minor behavior changes (e.g. doing an isset() will now
return false instead of throwing) which are more in line with
typical behavior.
Closure::bind() and Closure::bindTo() are currently reported as aliases in stubs because they have a single implementation. They are not aliases in fact though, they just use zend_parse_method_parameters() cleverly.
Thus, let's separate their implementation so that we don't have to alias Closure::bindTo() anymore. This will also have the advantage that the two ZPP implementations become more clear.
Closes GH-6169
Refactor the zend_is_callable implementation to check callability
at a particular frame (this is an implementation detail for now,
but could be exposed in the API if useful). Pick the first parent
user frame as the one to check.
We also change `Generator::throw()` to expect a `Throwable` in the
first place, and we now throw a TypeError instead of returning `false`
from `Exception::getTraceAsString()`.
