pfSense

<?php

require_once("guiconfig.inc");

//require("interfaces.inc");

//require("util.inc");

//require("pfsense-utils.inc");

//require("system.inc");

//require("head.inc");

//require("fbegin.inc");

//require("functions.inc");

        global $g, $config;

// get system nic's and create a database for them

        $array_of_real_nic_names = array();

        $array_of_custom_nic_names = array();

        $ifdescrs = array('wan' => 'WAN', 'lan' => 'LAN');

		for ($j = 1; isset($config['interfaces']['opt' . $j]); $j++) {

			$ifdescrs['opt' . $j] = $config['interfaces']['opt' . $j]['descr'];

		}

         		foreach ($ifdescrs as $ifdescr => $ifname):

/*			$ifinfo = get_interfaces_info($ifdescr);

*/

echo "$ifname ";

			$real_nic_names = convert_friendly_interface_to_real_interface_name($ifname);

			array_push($array_of_real_nic_names, $real_nic_names);

echo "$real_nic_names ";

		endforeach;

        // Get already nic's assigned to vnstat

        exec("ls /var/db/vnstat/ | grep -v '\.'", $vnstat_nic);

        // Compare real nic's with nic's assigned to vnstat

        $result = array_diff($array_of_real_nic_names, $vnstat_nic);

echo "$result";

//require("fend.inc");

?>