stringp

       stringp() - determine whether or not a given variable is a
       string

SYNOPSIS

       int stringp( mixed arg );

DESCRIPTION

       Return 1 if `arg' is a string.

SEE ALSO

       mapp(3),  pointerp(3),  objectp(3),  intp(3),  bufferp(3),
       floatp(3) functionp(3), nullp(3), undefinedp(3), errorp(3)