SYNOPSIS
        int stringp(mixed arg)

DESCRIPTION
        Return 1 if arg is a string.

SEE ALSO
        bytesp(E), clonep(E), closurep(E), coroutinep(E), floatp(E), intp(E),
        lpctypep(E), lwobjectp(E), mappingp(E), objectp(E), pointerp(E),
        referencep(E), structp(E), symbolp(E)