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# CX. YP/NIS Functions

# Introduction

NIS (formerly called Yellow Pages) allows network management of important administrative files (e.g. the password file). For more information refer to the NIS manpage and Introduction to YP/NIS. There is also a book called Managing NFS and NIS by Hal Stern.

# Requirements

None besides functions from standard Unix libraries which are always available (either `libc` or `libnsl`, configure will detect which one to use).

# Installation

To get these functions to work, you have to configure PHP with `--enable-yp`.

# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

`YPERR_BADARGS` (integer)

`YPERR_BADDB` (integer)

`YPERR_BUSY` (integer)

`YPERR_DOMAIN` (integer)

`YPERR_KEY` (integer)

`YPERR_MAP` (integer)

`YPERR_NODOM` (integer)

`YPERR_NOMORE` (integer)

`YPERR_PMAP` (integer)

`YPERR_RESRC` (integer)

`YPERR_RPC` (integer)

`YPERR_YPBIND` (integer)

`YPERR_YPERR` (integer)

`YPERR_YPSERV` (integer)

`YPERR_VERS` (integer)

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