PHP Developer's Dictionary- P75:PHP is an open source, server-side, HTML-embedded scripting language used to create dynamically generated Web pages. With an easy-to-use syntax and a large, extensible library of modules, PHP brings together the best of Perl, C++, and other languages. | PHP Developer s Dictionary Description The yp_get_defauit_domain function returns the default domain of the node. This is often used for retrieving the domain parameter for subsequent NIS calls. This function returns false 0 if the function encounters an error. yp_order Syntax int yp_order string domain string map Description The yp_order function returns the order number for a map in the specified domain . This function returns false 0 if an error occurs. yp_master Syntax string yp_master string domain string map Description The yp_master function returns the machine name of the master NIS server for a map in the specified domain . This function returns false 0 if it is not successful. yp_match Syntax string yp_match string domain string map string key Description The yp_match function returns the value associated with the parameter key from the specified map for the specified domain . This function returns false 0 if it is unsuccessful. yp_first IT-SC book 370 PHP Developer s Dictionary Syntax string yp_first string domain string map Description The yp_first function returns the first key value pair from the named map in the specified domain. If the function encounters an error false 0 is returned. yp_next Syntax string yp_next string domain string map string key Description The yp_next function returns the next key value pair in the named map after the specified key for the specified domain . This function returns false 0 if an error occurred. yp_errno Syntax int yp_errno void Description The yp_errno function returns the error code if the previous NIS operation failed see Table . Table . Possible Errors Returned by yp_errno Number Description 1 The arguments to the function are not valid. 2 The Remote Procedure Call RPC failed. The domain has been unbound. 3 The server in this domain cannot be bound. 4 The specified map in this server s domain is invalid. 5 The specified key is not valid in the specified map. 6 Internal NIS error. IT-SC book 371 PHP .