weekly release 2.3dev
[moodle.git] / iplookup / lib.php
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1<?php
2
3// This file is part of Moodle - http://moodle.org/
4//
5// Moodle is free software: you can redistribute it and/or modify
6// it under the terms of the GNU General Public License as published by
7// the Free Software Foundation, either version 3 of the License, or
8// (at your option) any later version.
9//
10// Moodle is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
17
18/**
19 * IP Lookup utility functions
20 *
21 * @package core
22 * @subpackage iplookup
23 * @copyright 2010 Petr Skoda {@link http://skodak.org}
24 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 */
26
27defined('MOODLE_INTERNAL') || die();
28
29/**
30 * Returns location information
31 * @param string $ip
32 * @return array
33 */
34function iplookup_find_location($ip) {
35 global $CFG;
36
37 $info = array('city'=>null, 'country'=>null, 'longitude'=>null, 'latitude'=>null, 'error'=>null, 'note'=>'', 'title'=>array());
38
39 if (!empty($CFG->geoipfile) and file_exists($CFG->geoipfile)) {
40 require_once('Net/GeoIP.php');
41
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42 $geoip = Net_GeoIP::getInstance($CFG->geoipfile, Net_GeoIP::STANDARD);
43 $location = $geoip->lookupLocation($ip);
44 $geoip->close();
45
46 if (empty($location)) {
47 $info['error'] = get_string('iplookupfailed', 'error', $ip);
48 return $info;
49 }
50 if (!empty($location->city)) {
f8311def 51 $info['city'] = textlib::convert($location->city, 'iso-8859-1', 'utf-8');
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52 $info['title'][] = $info['city'];
53 }
54
55 if (!empty($location->country_code)) {
56 $countries = get_string_manager()->get_list_of_countries(true);
57 if (isset($countries[$location->country_code])) {
58 // prefer our localized country names
59 $info['country'] = $countries[$location->country_code];
60 } else {
61 $info['country'] = $location->country_name;
62 }
63 $info['title'][] = $info['country'];
64 }
65 $info['longitude'] = $location->longitude;
66 $info['latitude'] = $location->latitude;
67 $info['note'] = get_string('iplookupmaxmindnote', 'admin');
68
69 return $info;
70
71 } else {
72 require_once($CFG->libdir.'/filelib.php');
73
74 $ipdata = download_file_content('http://netgeo.caida.org/perl/netgeo.cgi?target='.$ip);
75 if ($ipdata === false) {
76 $info['error'] = get_string('cannotnetgeo', 'error');
77 return $info;
78 }
79 $matches = null;
80 if (!preg_match('/LAT:\s*(-?\d+\.\d+)/s', $ipdata, $matches)) {
81 $info['error'] = get_string('iplookupfailed', 'error', $ip);
82 return $info;
83 }
84 $info['latitude'] = (float)$matches[1];
85 if (!preg_match('/LONG:\s*(-?\d+\.\d+)/s', $ipdata, $matches)) {
86 $info['error'] = get_string('iplookupfailed', 'error', $ip);
87 return $info;
88 }
89 $info['longitude'] = (float)$matches[1];
90
91 if (preg_match('/CITY:\s*([^<]*)/', $ipdata, $matches)) {
92 if (!empty($matches[1])) {
93 $info['city'] = s($matches[1]);
94 $info['title'][] = $info['city'];
95 }
96 }
97
98 if (preg_match('/COUNTRY:\s*([^<]*)/', $ipdata, $matches)) {
99 if (!empty($matches[1])) {
100 $countrycode = $matches[1];
101 $countries = get_string_manager()->get_list_of_countries(true);
102 if (isset($countries[$countrycode])) {
103 // prefer our localized country names
104 $info['country'] = $countries[$countrycode];
105 } else {
106 $info['country'] = $countrycode;
107 }
108 $info['title'][] = $info['country'];
109 }
110 }
111 $info['note'] = get_string('iplookupnetgeonote', 'admin');
112
113 return $info;
114 }
115
116}