Description
array 
yp_next ( string domain, string map, string key)
     yp_next() returns the next key-value pair in
     the named map after the specified key or FALSE.
    
     
例子 1. Example for NIS next 
<?php $entry = yp_next($domain, "passwd.byname", "joe");
  if (!$entry) {     echo "No more entries found\n";     echo "<!--" . yp_errno() . ": " . yp_err_string() . "-->"; }
  $key = key($entry);
  echo "The next entry after joe has key " . $key        . " and value " . $entry[$key]; ?>
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     See also yp_first() and
     yp_get_default_domain().