(PHP 8 >= 8.1.25)
DOMNameSpaceNode::__sleep — Forbids serialization unless serialization methods are implemented in a subclass
public DOMNameSpaceNode::__sleep(): array
Forbids serialization unless serialization methods are implemented in a subclass.
This function has no parameters.
The method always throws an exception.
Throws an Error exception when called.
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https://www.php.net/manual/en/domnamespacenode.sleep.php