<?php

class checkIPRange {
    public $ip;
    public $country; //ISO format only

    private function LoadDB(){
        $file = $this->$country."Range.xml";
        if (!file_exists($file)){
            echo $file." - File Base Not Found";
            Exit();
        }
        $XmlString  = file_get_contents($file);
        $xml        = simplexml_load_string($XmlString);
        $json       = json_encode($xml);
        $array      = json_decode($json,TRUE);
        return $array;
    }

    private function IPtoINT($ip){
        $IntIp = str_replace(".", "", $ip);
        $IntIp = (int)$IntIp;
        return $IntIp;
    }

    public function SearchIP(){
        $IntIp = $this->IPtoINT($this->$ip);
        $array = $this->LoadDB();
        foreach ($array  as $aString){
            $RangesIP    = trim($aString['RangeIP']);
            $aRangesIP   = explode(",",$RangesIP);
            foreach ($aRangesIP as $RangeIP){
                $aRangeIP = explode("-",$RangeIP);
                $aRangeIP[0] = $this->IPtoINT($aRangeIP[0]);
                $aRangeIP[1] = $this->IPtoINT($aRangeIP[1]);
                if ($IntIp >= $aRangeIP[0] and $IntIp <= $aRangeIP[1]){
                    return true;
                }
            }
        }
    }
}

Не понимаю что за ошибка - помогите