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php實現多城市切換特效

編輯：PHP綜合

我們先來看下個人常用的代碼 PHP

<?php



include_once('./qqwry.php');
$QQWry=new QQWry; 
 
function get_real_ip(){
$ip=false;
if(!empty($_SERVER["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,'玄武區')!==false){
  $city = "玄武區";
}
else if(strpos($city,'仙林')!==false){
  $city = "仙林";
}
else if(strpos($city,'秦淮區')!==false){
  $city = "秦淮區";
}
else if(strpos($city,'江寧')!==false){
  $city = "江寧";
}
else if(strpos($city,'鼓樓')!==false){
  $city = "鼓樓";
}
else{
  $city = "棲霞";
}



if (isset($_GET['chengshi'])) { //Ê×ÏÈ¼ì²âÊÇ·ñ»ñµÃÁË GET ´«µÝµÄÊý¾Ý  
setcookie("cookie_city",$_GET['chengshi'],time()+3600*24);
$city = $_GET['chengshi']; 
} 
else if (isset($_COOKIE["cookie_city"])) { //¼ì²âÊÇ·ñ´æÔÚêÇ³ÆCookie  
$city = $_COOKIE["cookie_city"]; //ÏÔÊ¾Cookie±£´æµÄÊý¾Ý 
} 
else {  
setcookie("cookie_city",$city,time()+3600*24); //´¿³õÊ¼»¯´Ë±äÁ¿ 
$_COOKIE["cookie_city"] = $city;
} 
?>

HTML

<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8"/>
<LINK href="css/css.css" type=text/css rel=stylesheet>
<SCRIPT src="js/jquery-1.4.2.min.js" type=text/javascript></SCRIPT>
<title>城市切換</title>
</head>
<BODY>
<DIV class=selCity id=allCity style="DISPLAY: none">
<DIV class=area>
<TABLE>
 <TBODY>
 <TR>
  <TD><A class=cur href="show.html">玄武區</A></TD>
  <TD><A href="show1.html">仙林</A></TD>
  <TD><A href="show2.html">秦淮區</A></TD>
  <TD><A href="show3.html">鼓樓</A></TD>
  <TD><A href="show4.html">江寧</A></TD>
  <TD><A href="show5.html">棲霞區</A></TD>
 </TR>
 </TBODY></TABLE>
<DIV class=none><A id=foldin href="javascript:;">全部</A></DIV></DIV></DIV>
<DIV class=header>
  <DIV class=area>
    <DIV class=r>
      <DIV class="topCtiy clear">
        <UL>
         
        <LI class=i1><A href="index.php">全部小區</A></LI>
         
         <LI class=i1>
         <?php 
         echo $city; 
         ?>
         </LI>
         <LI class=i2 id=changeCity>切換城市</LI>
        </UL>
      </DIV>
    </DIV>
  </DIV>
</DIV>
<SCRIPT type=text/javascript>
jQuery(function(){
  $("#changeCity").click(function(a){
    $("#allCity").slideDown(300);
    a.stopPropagation();
    $(this).blur();
  });
  $("#allCity").click(function(a){
    a.stopPropagation()
  });
  $(document).click(function(a){
    a.button!=2 && $("#allCity").slideUp(300)
  });
  $("#foldin").click(function(){
    $("#allCity").slideUp(300)
  });
});
</SCRIPT>
</body>
</html>

另外附上網友的實現方法：使用方法：解壓後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。B段：

<?
/*
函數名稱：ipCity
參數說明：$userip——用戶IP地址
函數功能：PHP通過IP地址判斷用戶所在城市
author:lee
contact:[email protected]
*/
function ipCity($userip) {
  //IP數據庫路徑，這裡用的是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);



    //提取的長整型數大於我們IP地址則修改結束位置進行下一次循環
    if($userip1num > $useripNum) {
      $EndNum = $Middle;
      continue;
    }



    //取完上一個索引後取下一個索引
    $DataSeek = fread($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';
  }



  return $useripaddr;
}
?>

PHP根據IP地址實現城市切換或跳轉到這裡，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.demo.com/";
}

將開頭的A段代碼和上面的C段代碼分別放在B段代碼的頭和尾，然後我們在需要跳轉的頁面加入以下代碼： <script src="/ipcity/ipaddress.php" type="text/javascript" language="javascript"></script> 刷新頁面，是不是達到預想的效果了呢？以上就是PHP獲取IP地址、PHP根據IP地址判斷城市以及PHP根據IP地址實現城市切換或跳轉的詳細介紹了，事實上，像PHP中通過IP地址自動切換城市就是這個方法的典型應用。舉一反三，我們通過這種方法，也可以實現屏蔽指定IP地址或城市的用戶訪問，自己研究一下吧，也挺簡單的：）