array
  'one.a' => int 1
  'one.b' => int 2
  'one.c.1' => string 'alpha' (length=5)
  'one.c.2' => string 'beta' (length=4)
  'two' => int 2
  'three.4' => string 'a' (length=1)
  0 => string 'delta' (length=5)
  '5.a' => int 1
  '5.1' => string 'a' (length=1)
  '5.b' => string 'c' (length=1)
  '5.2' => int 3