# yp_get_default_domain

(PHP 4, PHP 5 < 5.1.0)

yp_get_default_domain — Fetches the machine's default NIS domain

### 说明

yp_get_default_domain ( void ) : string

Returns the default domain of the node. Can be used as the domain parameter for successive NIS calls.

A NIS domain can be described a group of NIS maps. Every host that needs to look up information binds itself to a certain domain. Refer to the documents mentioned at the beginning for more detailed information.

### 返回值

Returns the default domain of the node or `FALSE`. Can be used as the domain parameter for successive NIS calls.

### 范例

Example #1 Example for the default domain

    <?php
    $domain = yp_get_default_domain();
    echo "Default NIS domain is: " . $domain;
    ?>