Daten aus pfSense Firewall auslesen

<?php
require_once("functions.inc");  
require_once("captiveportal.inc");  

function get_activeusers($cpent) {
	global $cpzone;	
	$session_time = time() - $cpent;
	if (!empty($cpent[7]) && !empty($cpent[9])) {
		$session_time_left = min($cpent + $cpent[7] - time(),$cpent[9] - time());
	} elseif (!empty($cpent[7]) && empty($cpent[9])) {
		$session_time_left = $cpent + $cpent[7] - time();
	} elseif (empty($cpent[7]) && !empty($cpent[9])) {
		$session_time_left = $cpent[9] - time();
	}

	return [
		"ip" =>$cpent['ip'],  
		"mac" => $cpent['mac'],  
		"username" => $cpent['username'],  
		"session_start" => date("d.m.Y H:i:s", $cpent),  
		"session_time" => convert_seconds_to_dhms($session_time),		  
		"session_time_left" => convert_seconds_to_dhms($session_time_left),  
		"auth_method" => $cpent['authmethod'],  
		"zone" => $cpzone  
	];
}

try{
        $sessions = ;
	$cpzone = strtolower($_REQUEST['zone']);  
	init_config_arr(array('captiveportal'));  
	$a_cp = &$config['captiveportal'];  

	if (count($a_cp) == 1) {
		$cpzone = current(array_keys($a_cp));
	}

	/* If the zone does not exist, do not display the invalid zone */
	if (!array_key_exists($cpzone, $a_cp)) {
		$cpzone = "";  
	}

	if (isset($cpzone) && !empty($cpzone) && isset($a_cp[$cpzone]['zoneid'])) {  
		$cpzoneid = $a_cp[$cpzone]['zoneid'];  
	}

	if (!empty($cpzone)) {
		$cpdb = captiveportal_read_db();
		foreach ($cpdb as $cpent) {
			$sessions = get_activeusers($cpent);
		}
	}
	header("Content-Type: application/json");  
	echo json_encode($sessions);

}catch(Exception $ex){}