101 lines
3.9 KiB
PHP
101 lines
3.9 KiB
PHP
<?php
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/*
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This script detects the client's IP address and fetches ISP info from ipinfo.io/
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Output from this script is a JSON string composed of 2 objects: a string called processedString which contains the combined IP, ISP, Contry and distance as it can be presented to the user; and an object called rawIspInfo which contains the raw data from ipinfo.io (will be empty if isp detection is disabled).
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Client side, the output of this script can be treated as JSON or as regular text. If the output is regular text, it will be shown to the user as is.
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*/
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$ip = "";
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header('Content-Type: application/json; charset=utf-8');
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if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
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$ip = $_SERVER['HTTP_CLIENT_IP'];
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} elseif (!empty($_SERVER['X-Real-IP'])) {
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$ip = $_SERVER['X-Real-IP'];
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} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
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$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
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} else {
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$ip = $_SERVER['REMOTE_ADDR'];
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}
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$ip = preg_replace("/^::ffff:/", "", $ip);
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if (strpos($ip, '::1') !== false) {
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echo json_encode(['processedString' => $ip . " - localhost ipv6 access", 'rawIspInfo' => ""]);
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die();
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}
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if (strpos($ip, '127.0.0') !== false) {
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echo json_encode(['processedString' => $ip . " - localhost ipv4 access", 'rawIspInfo' => ""]);
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die();
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}
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/**
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* Optimized algorithm from http://www.codexworld.com
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*
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* @param float $latitudeFrom
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* @param float $longitudeFrom
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* @param float $latitudeTo
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* @param float $longitudeTo
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*
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* @return float [km]
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*/
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function distance($latitudeFrom, $longitudeFrom, $latitudeTo, $longitudeTo) {
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$rad = M_PI / 180;
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$theta = $longitudeFrom - $longitudeTo;
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$dist = sin($latitudeFrom * $rad) * sin($latitudeTo * $rad) + cos($latitudeFrom * $rad) * cos($latitudeTo * $rad) * cos($theta * $rad);
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return acos($dist) / $rad * 60 * 1.853;
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}
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if (isset($_GET["isp"])) {
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$isp = "";
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$rawIspInfo=null;
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try {
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$json = file_get_contents("https://ipinfo.io/" . $ip . "/json");
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$details = json_decode($json, true);
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$rawIspInfo=$details;
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if (array_key_exists("org", $details))
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$isp .= $details["org"];
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else
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$isp .= "Unknown ISP";
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if (array_key_exists("country", $details))
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$isp .= ", " . $details["country"];
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$clientLoc = NULL;
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$serverLoc = NULL;
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if (array_key_exists("loc", $details))
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$clientLoc = $details["loc"];
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if (isset($_GET["distance"])) {
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if ($clientLoc) {
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$json = file_get_contents("https://ipinfo.io/json");
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$details = json_decode($json, true);
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if (array_key_exists("loc", $details))
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$serverLoc = $details["loc"];
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if ($serverLoc) {
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try {
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$clientLoc = explode(",", $clientLoc);
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$serverLoc = explode(",", $serverLoc);
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$dist = distance($clientLoc[0], $clientLoc[1], $serverLoc[0], $serverLoc[1]);
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if ($_GET["distance"] == "mi") {
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$dist /= 1.609344;
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$dist = round($dist, -1);
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if ($dist < 15)
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$dist = "<15";
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$isp .= " (" . $dist . " mi)";
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}else if ($_GET["distance"] == "km") {
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$dist = round($dist, -1);
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if ($dist < 20)
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$dist = "<20";
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$isp .= " (" . $dist . " km)";
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}
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} catch (Exception $e) {
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}
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}
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}
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}
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} catch (Exception $ex) {
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$isp = "Unknown ISP";
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}
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echo json_encode(['processedString' => $ip . " - " . $isp, 'rawIspInfo' => $rawIspInfo]);
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} else {
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echo json_encode(['processedString' => $ip, 'rawIspInfo' => ""]);
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}
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?>
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