int yp_order(string domain, string map);yp_order() returns the order number for a map or FALSE.
Example 1. Example for the NIS order <?php
$number = yp_order($domain,$mapname);
if(!$number) {
echo yp_errno() . ": " . yp_err_string();
}
echo "Order number for this map is: " . $order;
?>
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See also: yp_get_default_domain yp_errno and yp_err_string