PHP根據IP地址判斷城市實現城市切換或跳轉代碼

2024-05-04 21:48:41

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先要獲取ip地址相當簡單,下面先介紹兩種獲取IP地址的代碼,后面需要利用QQIP庫來查找當前IP是屬于那個IP段然后得出城市字段并返回.

獲取IP地址,代碼如下:

<?php

function GetIP() {

    if ($_SERVER["HTTP_X_FORWARDED_FOR"])

        $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];

    else if ($_SERVER["HTTP_CLIENT_IP"])

        $ip = $_SERVER["HTTP_CLIENT_IP"];

    else if ($_SERVER["REMOTE_ADDR"])

        $ip = $_SERVER["REMOTE_ADDR"];

    else if (getenv("HTTP_X_FORWARDED_FOR"))

        $ip = getenv("HTTP_X_FORWARDED_FOR");

    else if (getenv("HTTP_CLIENT_IP"))

        $ip = getenv("HTTP_CLIENT_IP");

    else if (getenv("REMOTE_ADDR"))

        $ip = getenv("REMOTE_ADDR");

    else

        $ip = "Unknown";

    return $ip;

}

echo GetIP();

?>

方法二,代碼如下:

function getip ()

{

if (getenv('http_client_ip')) {

      $ip = getenv('http_client_ip');

} else if (getenv('http_x_forwarded_for')) {

$ip = getenv('http_x_forwarded_for');

} else if (getenv('remote_addr')) {

      $ip = getenv('remote_addr');

} else {

      $ip = $_server['remote_addr'];

}

return $ip;

PHP通過IP地址判斷用戶所在城市

上文已經獲得了用戶IP地址,接下來,我們就是根據這個IP地址獲得用戶所在城市了,開始之前,我們需要下載一個現成的數據庫QQ IP數據庫.

最新IP地址數據庫:http://8.zjdx2.crsky.com/201209/qqwry0830.rar

使用方法:解壓后QQWry.Dat就是我們想要IP地址數據庫,我們新建一個ipcity文件夾,將數據庫放在下面,QQ IP數據庫使用非常方便,數據也很齊全,你可以及時關注官方更新以保持數據最新,強力推薦一下.

接下來,我們在上面的ipcity目錄下新建一個ipaddress.php文件,直接復制以下代碼進去即可,重要的地方也作了相應注釋,代碼如下:

<?php

/*

函數名稱：ipCity

參數說明：$userip——用戶IP地址

函數功能：PHP通過IP地址判斷用戶所在城市

author:lee

contact:xpsem2010@gmail.com

*/

function ipCity($userip) {

    //IP數據庫路徑，這里用的是QQ IP數據庫 20110405 純真版

    $dat_path = 'QQWry.dat';

    //判斷IP地址是否有效

    if(!ereg("^([0-9]{1,3}.){3}[0-9]{1,3}$", $userip)){

        return 'IP Address Invalid';

    }

    //打開IP數據庫

    if(!$fd = @fopen($dat_path, 'rb')){

        return 'IP data file not exists or access denied';

    }

    //explode函數分解IP地址，運算得出整數形結果

    $userip = explode('.', $userip);

    $useripNum = $userip[0] * 16777216 + $userip[1] * 65536 + $userip[2] * 256 + $userip[3];

    //獲取IP地址索引開始和結束位置

    $DataBegin = fread($fd, 4);

    $DataEnd = fread($fd, 4);

    $useripbegin = implode('', unpack('L', $DataBegin));

    if($useripbegin < 0) $useripbegin += pow(2, 32);

    $useripend = implode('', unpack('L', $DataEnd));

    if($useripend < 0) $useripend += pow(2, 32);

    $useripAllNum = ($useripend - $useripbegin) / 7 + 1;

    $BeginNum = 0;

    $EndNum = $useripAllNum;

    //使用二分查找法從索引記錄中搜索匹配的IP地址記錄

    while($userip1num>$useripNum || $userip2num<$useripNum) {

        $Middle= intval(($EndNum + $BeginNum) / 2);

        //偏移指針到索引位置讀取4個字節

        fseek($fd, $useripbegin + 7 * $Middle);

        $useripData1 = fread($fd, 4);

        if(strlen($useripData1) < 4) {

            fclose($fd);

            return 'File Error';

        }

        //提取出來的數據轉換成長整形，如果數據是負數則加上2的32次冪

        $userip1num = implode('', unpack('L', $useripData1));

        if($userip1num < 0) $userip1num += pow(2, 32);

        //提取的長整型數大于我們IP地址則修改結束位置進行下一次循環

        if($userip1num > $useripNum) {

            $EndNum = $Middle;

            continue;

        }

        //取完上一個索引后取下一個索引

        $DataSeek = fread($fd, 3);

        if(strlen($DataSeek) < 3) {

            fclose($fd);

            return 'File Error';

        }

        $DataSeek = implode('', unpack('L', $DataSeek.chr(0)));

        fseek($fd, $DataSeek);

        $useripData2 = fread($fd, 4);

        if(strlen($useripData2) < 4) {

            fclose($fd);

            return 'File Error';

        }

        $userip2num = implode('', unpack('L', $useripData2));

        if($userip2num < 0) $userip2num += pow(2, 32);

        //找不到IP地址對應城市

        if($userip2num < $useripNum) {

            if($Middle == $BeginNum) {

                fclose($fd);

                return 'No Data';

            }

            $BeginNum = $Middle;

        }

    }

    $useripFlag = fread($fd, 1);

    if($useripFlag == chr(1)) {

        $useripSeek = fread($fd, 3);

        if(strlen($useripSeek) < 3) {

            fclose($fd);

            return 'System Error';

        }

        $useripSeek = implode('', unpack('L', $useripSeek.chr(0)));

        fseek($fd, $useripSeek);

        $useripFlag = fread($fd, 1);

    }

    if($useripFlag == chr(2)) {

        $AddrSeek = fread($fd, 3);

        if(strlen($AddrSeek) < 3) {

            fclose($fd);

            return 'System Error';

        }

        $useripFlag = fread($fd, 1);

        if($useripFlag == chr(2)) {

            $AddrSeek2 = fread($fd, 3);

            if(strlen($AddrSeek2) < 3) {

                fclose($fd);

                return 'System Error';

            }

            $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));

            fseek($fd, $AddrSeek2);

        } else {

            fseek($fd, -1, SEEK_CUR);

        }

        while(($char = fread($fd, 1)) != chr(0))

            $useripAddr2 .= $char;

        $AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));

        fseek($fd, $AddrSeek);

        while(($char = fread($fd, 1)) != chr(0))

            $useripAddr1 .= $char;

    } else {

        fseek($fd, -1, SEEK_CUR);

        while(($char = fread($fd, 1)) != chr(0))

            $useripAddr1 .= $char;

        $useripFlag = fread($fd, 1);

        if($useripFlag == chr(2)) {

            $AddrSeek2 = fread($fd, 3);

            if(strlen($AddrSeek2) < 3) {

                fclose($fd);

                return 'System Error';

            }

            $AddrSeek2 = implode('', unpack('L', $AddrSeek2.chr(0)));

            fseek($fd, $AddrSeek2);

        } else {

            fseek($fd, -1, SEEK_CUR);

        }

        while(($char = fread($fd, 1)) != chr(0)){

            $useripAddr2 .= $char;

        }

    }

    fclose($fd);

    //返回IP地址對應的城市結果

    if(preg_match('/http/i', $useripAddr2)) {

        $useripAddr2 = '';

    }

    $useripaddr = "$useripAddr1 $useripAddr2";

    $useripaddr = preg_replace('/CZ88.Net/is', '', $useripaddr);

    $useripaddr = preg_replace('/^s*/is', '', $useripaddr);

    $useripaddr = preg_replace('/s*$/is', '', $useripaddr);

    if(preg_match('/http/i', $useripaddr) || $useripaddr == '') {

        $useripaddr = 'No Data';

    }//開源代碼Vevb.com

    return $useripaddr;

}

?>

PHP根據IP地址實現城市切換或跳轉,到這里,其實問題已經很簡單了,用簡單的js就通通搞定,C段如下:

//根據IP地址跳轉指定頁面js取得城市

var city='<?echo ipCity($xp_UserIp);?>';

//根據IP地址所有城市跳轉到指定頁面

if(city.indexOf("上海市")>=0){

window.location.href="http://shanghai.Vevb.com/";

}