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# CLXXVIII. 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 The Linux NIS(YP)/NYS/NIS+ HOWTO. There is also a book called Managing NFS and NIS by Hal Stern.

> Note: This extension has been moved to the PECL repository and is no longer bundled with PHP as of PHP 5.1.0.

> Note: This extension is not available on Windows platforms.

# 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.

# Runtime Configuration

This extension has no configuration directives defined in `php.ini`.

# 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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