.. efun:: int rmember(mixed *array, mixed elem [, int start])
  int rmember(string s, int elem [, int start])

  For arrays and strings, returns the index of the last occurance of second arg in the first arg, or -1 if none found. If :arg:`start` is given and non-negative, the search starts at that position.

  :history 3.2.10 introduced:
  :history 3.3.556 changed: added the :arg:`start` parameter.

  .. seealso:: :efun:`member`