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PHP教程：php實(shí)現(xiàn)多城市切換特效

作者：VEPHP   時(shí)間 2017-10-14

《PHP教程：php實(shí)現(xiàn)多城市切換特效》要點(diǎn)：
本文介紹了PHP教程：php實(shí)現(xiàn)多城市切換特效，希望對(duì)您有用。如果有疑問，可以聯(lián)系我們。

我們先來看下個(gè)人常用的代碼
<?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(qū)')!==false){
  $city = "玄武區(qū)";
}
else if(strpos($city,'仙林')!==false){
  $city = "仙林";
}
else if(strpos($city,'秦淮區(qū)')!==false){
  $city = "秦淮區(qū)";
}
else if(strpos($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×?è?ì2aê?????μ?á? GET ′?μYμ?êy?Y  
setcookie("cookie_city",$_GET['chengshi'],time()+3600*24);
$city = $_GET['chengshi']; 
} 
else if (isset($_COOKIE["cookie_city"])) { //?ì2aê???′??úê?3?Cookie  
$city = $_COOKIE["cookie_city"]; //??ê?Cookie±￡′?μ?êy?Y 
} 
else {  
setcookie("cookie_city",$city,time()+3600*24); //′?3?ê??ˉ′?±?á? 
$_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(qū)</A></TD>
  <TD><A href="show1.html">仙林</A></TD>
  <TD><A href="show2.html">秦淮區(qū)</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(qū)</A></TD>
 </TR>
 </TBODY></TABLE>
<DIV class=none><A id=foldin href=";">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(qū)</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(){
    $("#allCity").slideUp(300)
  });
});
</SCRIPT>
</body>
</html>
另外附上網(wǎng)友的實(shí)現(xiàn)方法：
使用方法：解壓后QQWry.Dat就是我們想要IP地址數(shù)據(jù)庫,我們新建一個(gè)ipcity文件夾,將數(shù)據(jù)庫放在下面.QQ IP數(shù)據(jù)庫使用非常方便,數(shù)據(jù)也很齊全,你可以及時(shí)關(guān)注官方更新以保持?jǐn)?shù)據(jù)最新,強(qiáng)力推薦一下：)
接下來,我們?cè)谏厦娴膇pcity目錄下新建一個(gè)ipaddress.php文件,直接復(fù)制以下代碼進(jìn)去即可,重要的地方也作了相應(yīng)注釋.B段：
<?
/*
函數(shù)名稱：ipCity
參數(shù)說明：$userip――用戶IP地址
函數(shù)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(shù)據(jù)庫路徑,這里用的是QQ IP數(shù)據(jù)庫 20110405 純真版
  $dat_path = 'QQWry.dat';
  //判斷IP地址是否有效
  if(!ereg("^([0-9]{1,3}.){3}[0-9]{1,3}$", $userip)){
    return 'IP Address Invalid';
  }
  //打開IP數(shù)據(jù)庫
  if(!$fd = @fopen($dat_path, 'rb')){
    return 'IP data file not exists or access denied';
  }
  //explode函數(shù)分解IP地址,運(yùn)算得出整數(shù)形結(jié)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(jié)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 + $BeginNum) / 2);
    //偏移指針到索引位置讀取4個(gè)字節(jié)
    fseek($fd, $useripbegin + 7 * $Middle);
    $useripData1 = fread($fd, 4);
    if(strlen($useripData1) < 4) {
      fclose($fd);
      return 'File Error';
    }
    //提取出來的數(shù)據(jù)轉(zhuǎn)換成長整形,如果數(shù)據(jù)是負(fù)數(shù)則加上2的32次冪
    $userip1num = implode('', unpack('L', $useripData1));
    if($userip1num < 0) $userip1num += pow(2, 32);
    //提取的長整型數(shù)大于我們IP地址則修改結(jié)束位置進(jìn)行下一次循環(huán)
    if($userip1num > $useripNum) {
      $EndNum = $Middle;
      continue;
    }
    //取完上一個(gè)索引后取下一個(gè)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) $userip2num += pow(2, 32);
    //找不到IP地址對(duì)應(yīng)城市
    if($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(duì)應(yīng)的城市結(jié)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 $useripaddr;
}
?>
PHP根據(jù)IP地址實(shí)現(xiàn)城市切換或跳轉(zhuǎn)
到這里,其實(shí)問題已經(jīng)很簡(jiǎn)單了,用簡(jiǎn)單的js就通通搞定.C段如下：
//根據(jù)IP地址跳轉(zhuǎn)指定頁面js取得城市
var city='<?echo ipCity($xp_UserIp);?>';
//根據(jù)IP地址所有城市跳轉(zhuǎn)到指定頁面
if(city.indexOf("上海市")>=0){
    window.location.;
}
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,然后我們?cè)谛枰D(zhuǎn)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(dá)到預(yù)想的效果了呢?
以上就是PHP獲取IP地址、PHP根據(jù)IP地址判斷城市以及PHP根據(jù)IP地址實(shí)現(xiàn)城市切換或跳轉(zhuǎn)的詳細(xì)介紹了,事實(shí)上,像PHP中通過IP地址自動(dòng)切換城市就是這個(gè)方法的典型應(yīng)用.舉一反三,我們通過這種方法,也可以實(shí)現(xiàn)屏蔽指定IP地址或城市的用戶拜訪,自己研究一下吧,也挺簡(jiǎn)單的：)

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