PHP 取得客戶端 IP 與地理位置類：支援代理偵測、新浪介面查詢

功能簡介

補完先前未完成的腳本，整合經典 IP 取得邏輯（支援 HTTP_X_FORWARDED_FOR、REMOTE_ADDR）與新浪 IP 定位介面，提供靈活的輸出格式控制。

類別程式碼

<?php
/*
 * GET LOCATION BY SINA IP INTERFACE
 *
 * @SOULTEARY 2013.04.14
 */
class IP
{
    private $args = array();

    function __construct()
    {
        $this->args = self::init_args(func_get_args());
        $ip = self::GetIP();

        $ret = preg_match_all('/(\d+\.){3}\d+/i', $ip, $result);
        if(!$ret){
            return false;
        }else{
            $result = $result[0];
        }

        if(isset($this->args['ONLYIP']) && $this->args['ONLYIP'] == true){
            if(isset($this->args['FORMAT']) && $this->args['FORMAT'] == 'JSON'){
                $result = json_encode($result);
            }else{
                $result = implode(',', $result);
            }
            if(isset($this->args['ECHO']) && $this->args['ECHO'] == true){
                echo $result;
                return true;
            }else{
                return $result;
            }
        }else{
            $apiURL = 'https://int.dpool.sina.com.cn/iplookup/iplookup.php?ip='.$result[0];
            if(isset($this->args['FORMAT']) && $this->args['FORMAT'] == 'JSON'){
                $apiURL .= '&format=json';
                $return = $this->ipCURL($apiURL);
            }else{
                $return = $this->ipCURL($apiURL);
                $return = iconv("GBK//IGNORE", "UTF-8", $return);
            }

            if(isset($this->args['ECHO']) && $this->args['ECHO'] == true){
                echo $return;
                return true;
            }else{
                return $return;
            }
        }
    }

    public function init_args($args)
    {
        $result = array();
        for($i=0, $n=count($args); $i<$n; $i++){
            $result = self::associative_push($args[$i], $result);
        }
        return $result;
    }

    public function associative_push($arr, $tmp)
    {
        if(is_array($tmp)){
            foreach($tmp as $key => $value){
                $arr[$key] = $value;
            }
            return $arr;
        }
        return false;
    }

    public function GetIP()
    {
        if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR'] && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], 'unknown')){
            return $_SERVER['HTTP_X_FORWARDED_FOR'];
        }elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')){
            return $_SERVER['REMOTE_ADDR'];
        }
    }

    private function ipCURL($url)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        ob_start();
        curl_exec($ch);
        curl_close($ch);
        $result = ob_get_contents();
        ob_end_clean();
        return $result;
    }
}
?>

使用示例（內建 Demo 頁面）

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf8">
    <title>demo</title>
    <script type="text/javascript">
        var ip = "<?php new IP(array('ONLYIP'=>true, 'ECHO'=>true));?>";
        var data = <?php new IP(array('FORMAT'=>'JSON','ECHO'=>true));?>;
        var result = '';
        for(o in data){
            result += o + ':' + data[o] + "\n";
        }
        alert(result + ip);
    </script>
</head>
<body>
<h1>CODE:</h1>

<h2>GET IP</h2>
<p>'ONLYIP'=>true,'ECHO'=>true</p>
<p><?php new IP(array('ONLYIP'=>true,'ECHO'=>true));?></p>

<p>'ONLYIP'=>true,'FORMAT'=>'JSON','ECHO'=>true</p>
<p><?php new IP(array('ONLYIP'=>true,'FORMAT'=>'JSON','ECHO'=>true));?></p>

<h2>GET Location</h2>
<p>'ECHO'=>true</p>
<p><?php new IP(array('ECHO'=>true));?></p>

<p>'FORMAT'=>'JSON','ECHO'=>true</p>
<p><?php new IP(array('FORMAT'=>'JSON','ECHO'=>true));?></p>
</body>
</html>

參數說明

• ONLYIP：true 僅回傳 IP，false（預設）查詢地理位置。
• FORMAT：JSON 回傳 JSON 格式，預設為新浪介面原始文字格式。
• ECHO：true 直接輸出，false 回傳字串。