(PHP 4, PHP 5 <= 5.0.5) Returns the machine name of the master NIS server for a map

(PHP 4, PHP 5 <= 5.0.5) Fetches the machine's default NIS domain

(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5) Returns the error code of the previous operation

(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5) Traverse the map and call a function on each entry

(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5) Return an array containing the entire map

(PHP 4, PHP 5 <= 5.0.5) Returns the next key-value pair in the named map

(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5) Returns the error string associated with the given error code

(PHP 4, PHP 5 <= 5.0.5) Returns the matched line

(PHP 4, PHP 5 <= 5.0.5) Returns the order number for a map

(PHP 4, PHP 5 <= 5.0.5) Returns the first key-value pair from the named map