Tipos de recursos
YP/NIS Functions
YP/NIS
PHP Manual

# Constantes predefinidas

Estas constantes están definidas por esta extensión y estarán disponibles solamente cuando la extensión ha sido o bien compilada dentro de PHP o grabada dinámicamente en tiempo de ejecución.

`YPERR_ACCESS` (integer)
  access violation (this has only been added recently and is only available from PECL CVS for now)
`YPERR_BADARGS` (integer)
  The function arguments are bad
`YPERR_BADDB` (integer)
  YP database is bad
`YPERR_BUSY` (integer)
  Database busy
`YPERR_DOMAIN` (integer)
  cannot bind to server in this domain
`YPERR_KEY` (integer)
  no such key in map
`YPERR_MAP` (integer)
  no such map in server's domain
`YPERR_NODOM` (integer)
  Local domain name not set
`YPERR_NOMORE` (integer)
  No more records in map database
`YPERR_PMAP` (integer)
  Can't communicate with portmapper
`YPERR_RESRC` (integer)
  resource allocation failure
`YPERR_RPC` (integer)
  RPC failure - domain has been unbound
`YPERR_YPBIND` (integer)
  Can't communicate with ypbind
`YPERR_YPERR` (integer)
  internal yp server or client error
`YPERR_YPSERV` (integer)
  Can't communicate with ypserv
`YPERR_VERS` (integer)
  YP version mismatch

Tipos de recursos
YP/NIS Functions
YP/NIS
PHP Manual