librespeed-mirror/getIP.php

<?php
    $ip="";
    header('Content-Type: text/plain; charset=utf-8');
    if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
        $ip=$_SERVER['HTTP_CLIENT_IP'];
    } elseif (!empty($_SERVER['X-Real-IP'])) {
        $ip=$_SERVER['X-Real-IP'];
    } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
        $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
    } else {
        $ip=$_SERVER['REMOTE_ADDR'];
    }
    $ip=preg_replace("/^::ffff:/", "", $ip);
	/**
	 * Optimized algorithm from http://www.codexworld.com
	 *
	 * @param float $latitudeFrom
	 * @param float $longitudeFrom
	 * @param float $latitudeTo
	 * @param float $longitudeTo
	 *
	 * @return float [km]
	 */
	function distance($latitudeFrom, $longitudeFrom, $latitudeTo, $longitudeTo){
		$rad = M_PI / 180;
		$theta = $longitudeFrom - $longitudeTo;
		$dist = sin($latitudeFrom * $rad) * sin($latitudeTo * $rad) +  cos($latitudeFrom * $rad) * cos($latitudeTo * $rad) * cos($theta * $rad);
		return acos($dist) / $rad * 60 *  1.853;
	}
    if(isset($_GET["isp"])){
		$isp="";
        try{
            $json = file_get_contents("https://ipinfo.io/".$ip."/json");
            $details = json_decode($json,true);
            if(array_key_exists("org",$details)) $isp.=$details["org"]; else $isp.="Unknown ISP";
            if(array_key_exists("country",$details)) $isp.=", ".$details["country"];
            $clientLoc=NULL; $serverLoc=NULL;
            if(array_key_exists("loc",$details)) $clientLoc=$details["loc"];
            if(isset($_GET["distance"])){
                if($clientLoc){
                    $json = file_get_contents("https://ipinfo.io/json");
                    $details = json_decode($json,true);
                    if(array_key_exists("loc",$details)) $serverLoc=$details["loc"];
                    if($serverLoc){
                        try{
                            $clientLoc=explode(",",$clientLoc);
                            $serverLoc=explode(",",$serverLoc);
                            $dist=distance($clientLoc[0],$clientLoc[1],$serverLoc[0],$serverLoc[1]);
                            if($_GET["distance"]=="mi"){
                                $dist/=1.609344;
                                $dist=round($dist,-1);
                                if($dist<15) $dist="<15";
                                $isp.=" (".$dist." mi)";
                            }else if($_GET["distance"]=="km"){
                                $dist=round($dist,-1);
                                if($dist<20) $dist="<20";
                                $isp.=" (".$dist." km)";
                            }
                        }catch(Exception $e){}
                    }
                }
            }
        }catch(Exception $ex){
            $isp="Unknown ISP";
        }
        echo $ip." - ".$isp;
    } else echo $ip;
?>