Variable Variables Pointing to Arrays or Nested Objects

Question

Is it possible to create a variable variable pointing to an array or to nested objects? The php docs specifically say you cannot point to SuperGlobals but its unclear (to me

Answer 1

there is a dynamic approach for to many nested levels:

$attrs = ['level1', 'levelt', 'level3',...];
$finalAttr = $myObject;
foreach ($attrs as $attr) {
    $finalAttr = $finalAttr->$attr;
}
return $finalAttr;