php如何获取客户端IP真实地址和归属地？接下来我们就简单分析一下。

//代码如下：

<?php 

/*获取客户端真实的IP*/

    function GetIps(){         

        $realip = '';         

        $unknown = 'unknown';         

        if (isset($_SERVER)){             

            if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && !empty($_SERVER['HTTP_X_FORWARDED_FOR'])

            && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], $unknown)){                 

            $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);                 

            foreach($arr as $ip){                     

                $ip = trim($ip);                     

                if ($ip != 'unknown'){                         

                    $realip = $ip;                         

                    break;                     

        }                 

    }              

    }else if(isset($_SERVER['HTTP_CLIENT_IP']) && !empty($_SERVER['HTTP_CLIENT_IP']) &&

    strcasecmp($_SERVER['HTTP_CLIENT_IP'], $unknown)){                 

        $realip = $_SERVER['HTTP_CLIENT_IP'];             

    }else if(isset($_SERVER['REMOTE_ADDR']) && !empty($_SERVER['REMOTE_ADDR'])

        && strcasecmp($_SERVER['REMOTE_ADDR'], $unknown)){                 

        $realip = $_SERVER['REMOTE_ADDR'];             

    }else{                 

        $realip = $unknown;             

    }         

    }else{             

    if(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), $unknown)){                 

    $realip = getenv("HTTP_X_FORWARDED_FOR");             

    }else if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), $unknown)){                 

    $realip = getenv("HTTP_CLIENT_IP");             

    }else if(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), $unknown)){                 

    $realip = getenv("REMOTE_ADDR");             

    }else{                 

    $realip = $unknown;             

    }          }         

    $realip = preg_match("/[d.]{7,15}/", $realip, $matches) ? $matches[0] : $unknown;         

    return $realip;      }       

/*把IP传入新浪API返回数据获取ip的真实归属地*/

    function GetIpFrom($ip = ''){         

    if(empty($ip)){             

        $ip = GetIps();         

    }         

    $res = @file_get_contents('http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip='.$ip);

    if(empty($res)){ return false; }         

    $jsonMatches = array();         

    preg_match('#{.+?}#', $res, $jsonMatches);         

    if(!isset($jsonMatches[0])){ return false; }         

    $json = json_decode($jsonMatches[0], true);         

    if(isset($json['ret']) && $json['ret'] == 1){             

    $json['ip'] = $ip;            

     unset($json['ret']);        

      }else{             

      return false;        

       }         

       $address[0] = $json['country'].$json['province'].$json['city']

       .$json['district'].$json['isp'].$json['type'].$json['desc'];       

       $address[1] = $json['ip'];               

       return $address;   

     }

　　//返回客户端的ip地址和归属地信息。

　　上面代码用的是新浪API。