解析php根据ip查询所在地区(非常有用,赶集网就用到)_PHP
dat文件,关于ip对应地区的信息文件
qqwry.dat文件
网上自己下载
class类文件,解析qqwry.data文件的
IpLocation.php文件
复制代码 代码如下:
class IpLocation {
/**
* @var resource 指针
*/
private $fp;
/**
* 第一条IP记录的偏移地址
* @var int
*/
private $firstip;
/**
* 最后一条IP记录的偏移地址
* @var int
*/
private $lastip;
/**
* IP记录的总条数(不包含版本信息记录)
* @var int
*/
private $totalip;
/**
* 构造函数,打开 QQWry.Dat 文件并初始化类中的信息
* @param string $filename
* @return IpLocation
*/
public function __construct($filename = "qqwry.dat") {
$this->fp = 0;
if (($this->fp = @fopen($filename, 'rb')) !== false) {
$this->firstip = $this->getlong();
$this->lastip = $this->getlong();
$this->totalip = ($this->lastip - $this->firstip) / 7;
}
}
/**
* 返回读取的长整型数
* @access private
* @return int
*/
public function getlong() {
//将读取的little-endian编码的4个字节转化为长整型数
$result = unpack('Vlong', fread($this->fp, 4));
return $result['long'];
}
/**
* 返回读取的3个字节的长整型数
*
* @access private
* @return int
*/
public function getlong3() {
//将读取的little-endian编码的3个字节转化为长整型数
$result = unpack('Vlong', fread($this->fp, 3).chr(0));
return $result['long'];
}
/**
* 返回压缩后可进行比较的IP地址
*
* @access private
* @param string $ip
* @return string
*/
public function packip($ip) {
// 将IP地址转化为长整型数,如果在PHP5中,IP地址错误,则返回False,
// 这时intval将Flase转化为整数-1,之后压缩成big-endian编码的字符串
return pack('N', intval(ip2long($ip)));
}
/**
* 返回读取的字符串
*
* @access private
* @param string $data
* @return string
*/
public function getstring($data = "") {
$char = fread($this->fp, 1);
while (ord($char) > 0) { // 字符串按照C格式保存,以\0结束
$data .= $char; // 将读取的字符连接到给定字符串之后
$char = fread($this->fp, 1);
}
return mb_convert_encoding($data, 'utf-8', 'gb2312');
}
/**
* 返回地区信息
*
* @access private
* @return string
*/
public function getarea() {
$byte = fread($this->fp, 1); // 标志字节
switch (ord($byte)) {
case 0: // 没有区域信息
$area = "";
break;
case 1:
case 2: // 标志字节为1或2,表示区域信息被重定向
fseek($this->fp, $this->getlong3());
$area = $this->getstring();
break;
default: // 否则,表示区域信息没有被重定向
$area = $this->getstring($byte);
break;
}
return $area;
}
/**
* 根据所给 IP 地址或域名返回所在地区信息
* @access public
* @param string $ip
* @return array
*/
function getlocation($ip) {
if (!$this->fp) return null; // 如果数据文件没有被正确打开,则直接返回空
$location['ip'] = gethostbyname($ip); // 将输入的域名转化为IP地址
$ip = $this->packip($location['ip']); // 将输入的IP地址转化为可比较的IP地址
// 不合法的IP地址会被转化为255.255.255.255
// 对分搜索
$l = 0; // 搜索的下边界
$u = $this->totalip; // 搜索的上边界
$findip = $this->lastip; // 如果没有找到就返回最后一条IP记录(QQWry.Dat的版本信息)
while ($l $i = floor(($l + $u) / 2); // 计算近似中间记录
fseek($this->fp, $this->firstip + $i * 7);
$beginip = strrev(fread($this->fp, 4)); // 获取中间记录的开始IP地址
// strrev函数在这里的作用是将little-endian的压缩IP地址转化为big-endian的格式
// 以便用于比较,后面相同。
if ($ip $u = $i - 1; // 将搜索的上边界修改为中间记录减一
}else{
fseek($this->fp, $this->getlong3());
$endip = strrev(fread($this->fp, 4)); // 获取中间记录的结束IP地址
if ($ip > $endip) { // 用户的IP大于中间记录的结束IP地址时
$l = $i + 1; // 将搜索的下边界修改为中间记录加一
}else{ // 用户的IP在中间记录的IP范围内时
$findip = $this->firstip + $i * 7;
break; // 则表示找到结果,退出循环
}
}
}
//获取查找到的IP地理位置信息
fseek($this->fp, $findip);
$location['beginip'] = long2ip($this->getlong()); // 用户IP所在范围的开始地址
$offset = $this->getlong3();
fseek($this->fp, $offset);
$location['endip'] = long2ip($this->getlong()); // 用户IP所在范围的结束地址
$byte = fread($this->fp, 1); // 标志字节
switch (ord($byte)) {
case 1: // 标志字节为1,表示国家和区域信息都被同时重定向
$countryOffset = $this->getlong3(); // 重定向地址
fseek($this->fp, $countryOffset);
$byte = fread($this->fp, 1); // 标志字节
switch (ord($byte)) {
case 2: // 标志字节为2,表示国家信息又被重定向
fseek($this->fp, $this->getlong3());
$location['country'] = $this->getstring();
fseek($this->fp, $countryOffset + 4);
$location['area'] = $this->getarea();
break;
default: // 否则,表示国家信息没有被重定向
$location['country'] = $this->getstring($byte);
$location['area'] = $this->getarea();
break;
}
break;
case 2: // 标志字节为2,表示国家信息被重定向
fseek($this->fp, $this->getlong3());
$location['country'] = $this->getstring();
fseek($this->fp, $offset + 8);
$location['area'] = $this->getarea();
break;
default: // 否则,表示国家信息没有被重定向
$location['country'] = $this->getstring($byte);
$location['area'] = $this->getarea();
break;
}
if ($location['country'] == " CZ88.NET") { // CZ88.NET表示没有有效信息
$location['country'] = "未知";
}
if ($location['area'] == " CZ88.NET") {
$location['area'] = "";
}
return $location;
}
/**
* 析构函数,用于在页面执行结束后自动关闭打开的文件。
*
*/
function __desctruct() {
if ($this->fp) {
fclose($this->fp);
}
$this->fp = 0;
}
}
?>
这个也可以网上下载,也可以copy这里的,这里的也是很全的。
执行文件,我这里叫ip_location.php文件
复制代码 代码如下:
function getIpPlace(){
require_once("IpLocation.php")//加载类文件IpLocation.php
$ipfile = "qqwry.dat"; //获取ip对应地区的信息文件
$iplocation = new IpLocation($ipfile); //new IpLocation($ipfile) $ipfile ip对应地区信息文件
$ipresult = $iplocation->getlocation("ip地址"); //根据ip地址获得地区 getlocation("ip地区")
return $ipresult;
}
print_r($getIpPlace()); //调用方法
?>

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