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PHP中根据IP地址判断城市实现城市切换或跳转代码_php技巧

WBOY
WBOYOriginal
2016-05-17 09:09:38882browse

获取IP地址

复制代码 代码如下:

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
复制代码 代码如下:

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通过IP地址判断用户所在城市
上文已经获得了用户IP地址,接下来,我们就是根据这个IP地址获得用户所在城市了。开始之前,我们需要下载一个现成的数据库QQ IP数据库。
最新IP地址数据库:http://www.jb51.net/softs/10529.html
使用方法:解压后QQWry.Dat就是我们想要IP地址数据库,我们新建一个ipcity文件夹,将数据库放在下面。QQ IP数据库使用非常方便,数据也很齐全,你可以及时关注官方更新以保持数据最新,强力推荐一下:)
接下来,我们在上面的ipcity目录下新建一个ipaddress.php文件,直接复制以下代码进去即可,重要的地方也作了相应注释。B段:
复制代码 代码如下:


/*
函数名称:ipCity
参数说明:$userip——用户IP地址
函数功能:PHP通过IP地址判断用户所在城市
author:lee
contact:xpsem2010@gmail.com
*/
function ipCity($userip) {
    //IP数据库路径,这里用的是QQ IP数据库 20110405 纯真版
    $dat_path = 'QQWry.dat';
    //判断IP地址是否有效
    if(!ereg("^([0-9]{1,3}.){3}[0-9]{1,3}$", $userip)){
        return 'IP Address Invalid';
    }
    //打开IP数据库
    if(!$fd = @fopen($dat_path, 'rb')){
        return 'IP data file not exists or access denied';
    }
    //explode函数分解IP地址,运算得出整数形结果
    $userip = explode('.', $userip);
    $useripNum = $userip[0] * 16777216 + $userip[1] * 65536 + $userip[2] * 256 + $userip[3];
    //获取IP地址索引开始和结束位置
    $DataBegin = fread($fd, 4);
    $DataEnd = fread($fd, 4);
    $useripbegin = implode('', unpack('L', $DataBegin));
    if($useripbegin     $useripend = implode('', unpack('L', $DataEnd));
    if($useripend     $useripAllNum = ($useripend - $useripbegin) / 7 + 1;
    $BeginNum = 0;
    $EndNum = $useripAllNum;
    //使用二分查找法从索引记录中搜索匹配的IP地址记录
    while($userip1num>$useripNum || $userip2num        $Middle= intval(($EndNum + $BeginNum) / 2);
        //偏移指针到索引位置读取4个字节
        fseek($fd, $useripbegin + 7 * $Middle);
        $useripData1 = fread($fd, 4);
        if(strlen($useripData1)             fclose($fd);
            return 'File Error';
        }
        //提取出来的数据转换成长整形,如果数据是负数则加上2的32次幂
        $userip1num = implode('', unpack('L', $useripData1));
        if($userip1num         //提取的长整型数大于我们IP地址则修改结束位置进行下一次循环
        if($userip1num > $useripNum) {
            $EndNum = $Middle;
            continue;
        }
        //取完上一个索引后取下一个索引
        $DataSeek = fread($fd, 3);
        if(strlen($DataSeek)             fclose($fd);
            return 'File Error';
        }
        $DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
        fseek($fd, $DataSeek);
        $useripData2 = fread($fd, 4);
        if(strlen($useripData2)             fclose($fd);
            return 'File Error';
        }
        $userip2num = implode('', unpack('L', $useripData2));
        if($userip2num         //找不到IP地址对应城市
        if($userip2num             if($Middle == $BeginNum) {
                fclose($fd);
                return 'No Data';
            }
            $BeginNum = $Middle;
        }
    }
    $useripFlag = fread($fd, 1);
    if($useripFlag == chr(1)) {
        $useripSeek = fread($fd, 3);
        if(strlen($useripSeek)             fclose($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($AddrSeek)             fclose($fd);
            return 'System Error';
        }
        $useripFlag = fread($fd, 1);
        if($useripFlag == chr(2)) {
            $AddrSeek2 = fread($fd, 3);
            if(strlen($AddrSeek2)                 fclose($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($AddrSeek2)                 fclose($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地址对应的城市结果
    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';
    }
    return $useripaddr;
}
?>

PHP根据IP地址实现城市切换或跳转
到这里,其实问题已经很简单了,用简单的js就通通搞定。C段如下:
//根据IP地址跳转指定页面js取得城市
复制代码 代码如下:

var city='';

//根据IP地址所有城市跳转到指定页面
复制代码 代码如下:

if(city.indexOf("上海市")>=0){
        window.location.href="http://shanghai.demo.com/";
}

将开头的A段代码和上面的C段代码分别放在B段代码的头和尾,然后我们在需要跳转的页面加入以下代码:
复制代码 代码如下:


 

刷新页面,是不是达到预想的效果了呢?
上面的代码只是简单的判断了ip那里就跳到那,如果出现如,我想把湖南所有IP都跳到长沙去,那像衡阳,刘阳,耒阳 这些就要作多次父线处理了,要想知道请看下集。
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