我们先来看下个人常用的代码
PHP
<"HTTP_CLIENT_IP"])){ $ip = $_SERVER["HTTP_CLIENT_IP"]; } if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']); if ($ip) { array_unshift($ips, $ip); $ip = FALSE; } for ($i = 0; $i < count($ips); $i++) { if (!eregi ("^(10|172\.16|192\.168)\.", $ips[$i])) { $ip = $ips[$i]; break; } } } return $ip; } function is_ip($str) { $ip = explode(".", $str); if (count($ip)<4 || count($ip)>4) return 0; foreach($ip as $ip_addr) { if ( !is_numeric($ip_addr) ) return 0; if ( $ip_addr<0 || $ip_addr>255 ) return 0; } return 1; } $ip=$_SERVER['REMOTE_ADDR']; $ifErr=$QQWry->QQWry($ip); $city = $QQWry->Country.$QQWry->Local; //echo $city;*/ if (strpos($city,'玄武区')!==false){ $city = "玄武区"; } else if(strpos($city,'仙林')!==false){ $city = "仙林"; } else if(strpos($city,'秦淮区')!==false){ $city = "秦淮区"; } else if(strpos($city,'江宁')!==false){ $city = "江宁"; } else if(strpos($city,'鼓楼')!==false){ $city = "鼓楼"; } else{ $city = "栖霞"; } if (isset($_GET['chengshi'])) { //Ê×Ïȼì²âÊÇ·ñ»ñµÃÁË GET ´«µÝµÄÊý¾Ý setcookie("cookie_city",$_GET['chengshi'],time()+3600*24); $city = $_GET['chengshi']; } else if (isset($_COOKIE["cookie_city"])) { //¼ì²âÊÇ·ñ´æÔÚêdzÆCookie $city = $_COOKIE["cookie_city"]; //ÏÔʾCookie±£´æµÄÊý¾Ý } else { setcookie("cookie_city",$city,time()+3600*24); //´¿³õʼ»¯´Ë±äÁ¿ $_COOKIE["cookie_city"] = $city; } "htmlcode"><!DOCTYPE html> <html lang="zh-cn"> <head> <meta charset="utf-8"/> <LINK href="css/css.css" type=text/css rel=stylesheet> <SCRIPT src="/UploadFiles/2021-04-02/jquery-1.4.2.min.js"> 另外附上网友的实现方法: 使用方法:解压后QQWry.Dat就是我们想要IP地址数据库,我们新建一个ipcity文件夹,将数据库放在下面。QQ IP数据库使用非常方便,数据也很齐全,你可以及时关注官方更新以保持数据最新,强力推荐一下:) 接下来,我们在上面的ipcity目录下新建一个ipaddress.php文件,直接复制以下代码进去即可,重要的地方也作了相应注释。B段:<"^([0-9]{1,3}.){3}[0-9]{1,3}$", $userip)){ return 'IP Address Invalid'; } //打开IP数据库 if(!$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 < 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 = $useripAllNum; //使用二分查找法从索引记录中搜索匹配的IP地址记录 while($userip1num>$useripNum || $userip2num<$useripNum) { $Middle= intval(($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($useripData1) < 4) { fclose($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 < 0) $userip1num += pow(2, 32); //提取的长整型数大于我们IP地址则修改结束位置进行下一次循环 if($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($DataSeek) < 3) { fclose($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) $userip2num += pow(2, 32); //找不到IP地址对应城市 if($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; } "htmlcode">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: <script src="/UploadFiles/2021-04-02/ipaddress.php" type="text/javascript" language="javascript"></script> 刷新页面,是不是达到预想的效果了呢? 以上就是PHP获取IP地址、PHP根据IP地址判断城市以及PHP根据IP地址实现城市切换或跳转的详细介绍了,事实上,像PHP中通过IP地址自动切换城市就是这个方法的典型应用。举一反三,我们通过这种方法,也可以实现屏蔽指定IP地址或城市的用户访问,自己研究一下吧,也挺简单的:)//根据IP地址跳转指定页面js取得城市 var city='<"上海市")>=0){ window.location.href="http://shanghai.demo.com/"; }标签:php多城市切换
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