Question

Php uses variable variables.
So

$a="hello";
$$a="oops";
echo($hello) 

this gives us output:oops
My question is can Variable variables be used for more levels
like is $$$a defined?
will

$a="hello";
$$a="oops";
$$$a="she";
echo($oops);

give us output?? If yes to what level are variable variables possible?
If no why not????

Answer 1

Yes, this is fine, and AFAIK they can be nested infinitely.

Please don’t use these though, it’s very rare that variable variables are a good idea, let alone variable variable variable variable variable variable variable variable variable variable variable variable variable variable variable variable variable variables.