淘寶公司提供了一個很好用的IP地理信息查詢接口。
在這里:http://ip.taobao.com/
TaobaoIPQuery2這個類將極大的簡化相關的信息查詢。
類 TaobaoIPQuery2 文件：
<?php/* Usage: * $IPInfo = TaobaoIPQuery2::getIPInfo('IPAddress'); */Class TaobaoIPQuery2{ private static $_requestURL = 'http://ip.taobao.com/service/getIpInfo.php'; public static function getIPInfo($ip){ $long = ip2long($ip); if($long === 0){ throw new Exception('IP address error', 5); } $ip=long2ip($long); $IPInfo = self::queryIPInfo($ip); return self::parseJSON($IPInfo); } private static function queryIPInfo($ip){ $query = http_build_query(array('ip'=>$ip)); $ch = curl_init(); $options = array( CURLOPT_URL => sprintf('%s?%s', self::$_requestURL, $query), CURLOPT_RETURNTRANSFER => true, CURLOPT_AUTOREFERER => false, CURLOPT_FOLLOWLOCATION => false, CURLOPT_HEADER => false, CURLOPT_TIMEOUT => 3.0, ); curl_setopt_array($ch, $options); $content = curl_exec($ch); curl_close($ch); return $content; } private static function parseJSON($json){ $O = json_decode ($json, true); if(false === is_null($O)){ return $O; } if (version_compare(PHP_VERSION, '5.3.0', '>=')) { $errorCode = json_last_error(); if(isset(self::$_JSONParseError[$errorCode])){ throw new Exception(self::$_JSONParseError[$errorCode], 5); } } throw new Exception('JSON parse error', 5); } private static $_JSONParseError = array( JSON_ERROR_NONE=>'No error has occurred', JSON_ERROR_DEPTH=>'The maximum stack depth has been exceeded', JSON_ERROR_CTRL_CHAR=>'Control character error, possibly incorrectly encoded', JSON_ERROR_STATE_MISMATCH=>'Invalid or malformed JSON', JSON_ERROR_SYNTAX=>'Syntax error', JSON_ERROR_UTF8=>'Malformed UTF-8 characters, possibly incorrectly encoded', );} TaobaoIPQuery2.Class.php：
<?phpClass TaobaoIPQuery2{ private static $_requestURL = 'http://ip.taobao.com/service/getIpInfo.php'; public static function getIPInfo($ip){ $long = ip2long($ip); if($long === 0){ throw new Exception('IP address error', 5); } $ip=long2ip($long); $IPInfo = self::queryIPInfo($ip); return self::parseJSON($IPInfo); } private static function queryIPInfo($ip){ $query = http_build_query(array('ip'=>$ip)); $ch = curl_init(); $options = array( CURLOPT_URL => sprintf('%s?%s', self::$_requestURL, $query), CURLOPT_RETURNTRANSFER => true, CURLOPT_AUTOREFERER => false, CURLOPT_FOLLOWLOCATION => false, CURLOPT_HEADER => false, CURLOPT_TIMEOUT => 3.0, ); curl_setopt_array($ch, $options); $content = curl_exec($ch); curl_close($ch); return $content; } private static function parseJSON($json){ $O = json_decode ($json, true); if(false === is_null($O)){ return $O; } if (version_compare(PHP_VERSION, '5.3.0', '>=')) { $errorCode = json_last_error(); if(isset(self::$_JSONParseError[$errorCode])){ throw new Exception(self::$_JSONParseError[$errorCode], 5); } } throw new Exception('JSON parse error', 5); } private static $_JSONParseError = array( JSON_ERROR_NONE=>'No error has occurred', JSON_ERROR_DEPTH=>'The maximum stack depth has been exceeded', JSON_ERROR_CTRL_CHAR=>'Control character error, possibly incorrectly encoded', JSON_ERROR_STATE_MISMATCH=>'Invalid or malformed JSON', JSON_ERROR_SYNTAX=>'Syntax error', JSON_ERROR_UTF8=>'Malformed UTF-8 characters, possibly incorrectly encoded', );} 調用：
$ip = $_SERVER["REMOTE_ADDR"];$ipquery = new taobaoIPQuery($ip);$region = $ipquery->get_region();$country = $ipquery->get_country();$city = $ipquery->get_city();
我們再來看個騰訊api接口的
/* *根據騰訊IP分享計劃的地址獲取IP所在地，比較精確 */ function getIPLoc_QQ($queryIP){ $url = 'http://ip.qq.com/cgi-bin/searchip?searchip1='.$queryIP; $ch = curl_init($url); curl_setopt($ch,CURLOPT_ENCODING ,'gb2312'); curl_setopt($ch, CURLOPT_TIMEOUT, 10); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true) ; // 獲取數據返回 $result = curl_exec($ch); $result = mb_convert_encoding($result, "utf-8", "gb2312"); // 編碼轉換，否則亂碼 curl_close($ch); preg_match("@<span>(.*)</span></p>@iU",$result,$ipArray); $loc = $ipArray[1]; return $loc; } 騰訊的IP分享計劃的查詢接口連接是：http://ip.qq.com/cgi-bin/searchip，該連接后面會帶有一個get參數searchip1，即searchip1=你要查詢的IP地址。采用PHP向http://ip.qq.com/cgi-bin/searchip發送http get request，然后獲取相應，獲得相應結果后，將結果用正則表達式將需要的地理位置信息提取出來就OK了。當然，PHP發送get請求的方法有很多，我用curl來模擬http請求的方法
Curl是PHP的一個擴展，進行測試之前，先確認PHP已經加載了curl擴展。打開PHP配置文件php.ini，搜索 “extension=php_curl.dll”，將其前面的分號（;）去掉，然后重啟HTTP服務器，查看phpinfo()，若能看到curl的信 息，說明PHP擴展curl成功
接下來是新浪網的API接口
新浪的IP查詢接口地址是：http://int.dpool.sina.com.cn/iplookup/iplookup.php，該連接后面也帶有get參數，參數ip=你要查詢的IP地址，format=返回的查詢結果格式。為了方便起見，返回的格式采用json，即format=json，因此，PHP出來擴展curl外，還得擴展json：
/* *根據新浪IP查詢接口獲取IP所在地 */ function getIPLoc_sina($queryIP){ $url = 'http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip='.$queryIP; $ch = curl_init($url); //curl_setopt($ch,CURLOPT_ENCODING ,'utf8'); curl_setopt($ch, CURLOPT_TIMEOUT, 10); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true) ; // 獲取數據返回 $location = curl_exec($ch); $location = json_decode($location); curl_close($ch); $loc = ""; if($location===FALSE) return ""; if (emptyempty($location->desc)) { $loc = $location->province.$location->city.$location->district.$location->isp; }else{ $loc = $location->desc; } return $loc; } 使用getIPLoc_sina("183.37.209.57")即可得到IP地址所在的地址位置。
