No
There is no __toArray magic method in PHP. An enhancement proposal has been rejected in 2006 with the following answer:
[2006-08-20 11:12 UTC] helly@php.net
Why not simply have a method asArray() maybe even as par of an
interface:interface ArrayConversion { function asArray(); }
See, we have __toString as it is supported in language constructs like
echo, print and other internal functions. But we decided against an
autoconversion for arrays already. So itwill never be supported in any
language construct. That said there is no needed for this and nothing
you would win against the above interface. In fact you would make it
php more complex because you’d add just one more magic feature.
It is thus very unlikely that it will be implemented in any future release (which is a pity, if you ask me).