string[] yp_first(string domain, string map);yp_first() returns the first key-value pair from the named map in the named domain, otherwise FALSE.
Example 1. Example for the NIS first <?php
$entry = yp_first($domain, "passwd.byname");
if(!$entry) {
echo yp_errno() . ": " . yp_err_string();
}
$key = key($entry);
echo "First entry in this map has key " . $key
. " and value " . $entry[$key];
?>
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See also: yp_get_default_domain yp_errno and yp_err_string