根据IP地址获取IP的详细信息

<?php
header('Content-Type:text/html; charset=utf-8');

function ip_data() {
    $ip  = GetIP();
    $url = 'http://ip.taobao.com/service/getIpInfo.php?ip=' . urlencode($ip);
    $ch  = curl_init();
    curl_setopt( $ch, CURLOPT_URL , $url );
    curl_setopt( $ch, CURLOPT_RETURNTRANSFER , 1 );
    $ipdata = json_decode( curl_exec($ch) , true );
    curl_close($ch);
    if( $ipdata['code'] ){
        die(' 请确保ip地址没有问题！ ');
    }
    foreach( $ipdata['data'] as $k=>$v ){
        echo $k . ' ： ' . $v . "<br>";

    }
}  

/* 获取用户真实地址
 * @return    string  返回用户ip
*/

function GetIP(){
    if (isset($_SERVER)){
        if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])){
            $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
            /* 取X-Forwarded-For中第x个非unknown的有效IP字符? */
            foreach ($arr as $ip){
                $ip = trim($ip);
                if ($ip != 'unknown'){
                    $realip = $ip;
                    break;
                }
            }
        }elseif (isset($_SERVER['HTTP_CLIENT_IP'])){
            $realip = $_SERVER['HTTP_CLIENT_IP'];
        }else{
            if (isset($_SERVER['REMOTE_ADDR'])){
                $realip = $_SERVER['REMOTE_ADDR'];
            }else{
                $realip = '0.0.0.0';
            }
        }
    }else{
        if (getenv('HTTP_X_FORWARDED_FOR')){
            $realip = getenv('HTTP_X_FORWARDED_FOR');
        }elseif (getenv('HTTP_CLIENT_IP')){
            $realip = getenv('HTTP_CLIENT_IP');
        }else{
            $realip = getenv('REMOTE_ADDR');
        }
    }
    preg_match("/[\d\.]{7,15}/", $realip, $onlineip);
    $realip = ! empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';
    return $realip;
}

ip_data();