.. efun:: int stringp(mixed arg)

  Return 1 if :arg:`arg` is a string.

  .. seealso:: :efun:`clonep`, :efun:`closurep`, :efun:`floatp`, :efun:`mappingp`, :efun:`objectp`, :efun:`intp`, :efun:`referencep`, :efun:`pointerp`, :efun:`symbolp`, :efun:`structp`