PHP转换IP地址到真实地址的方法详解_PHP教程

function convertip($ip) {
//IP数据文件路径
$dat_path = 'QQWry.Dat';
//检查IP地址
//if(!preg_match("/^d{1,3}.d{1,3}.d{1,3}.d{1,3}$/", $ip)) {
// return 'IP Address Error';
//}
//打开IP数据文件
if(!$fd = @fopen($dat_path, 'rb')){
return 'IP date file not exists or access denied';
}
//分解IP进行运算，得出整形数
$ip = explode('.', $ip);
$ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];
//获取IP数据索引开始和结束位置
$DataBegin = fread($fd, 4);
$DataEnd = fread($fd, 4);
$ipbegin = implode('', unpack('L', $DataBegin));
if($ipbegin $ipend = implode('', unpack('L', $DataEnd));
if($ipend $ipAllNum = ($ipend - $ipbegin) / 7 + 1;
$BeginNum = 0;
$EndNum = $ipAllNum;
//使用二分查找法从索引记录中搜索匹配的IP记录
while($ip1num>$ipNum || $ip2num $Middle= intval(($EndNum + $BeginNum) / 2);
//偏移指针到索引位置读取4个字节
fseek($fd, $ipbegin + 7 * $Middle);
$ipData1 = fread($fd, 4);
if(strlen($ipData1) fclose($fd);
return 'System 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
$ip1num = implode('', unpack('L', $ipData1));
if($ip1num //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($ip1num > $ipNum) {
$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 'System Error';
}
$DataSeek = implode('', unpack('L', $DataSeek.chr(0)));
fseek($fd, $DataSeek);
$ipData2 = fread($fd, 4);
if(strlen($ipData2) fclose($fd);
return 'System Error';
}
$ip2num = implode('', unpack('L', $ipData2));
if($ip2num //没找到提示未知
if($ip2num if($Middle == $BeginNum) {
fclose($fd);
return 'Unknown';
}
$BeginNum = $Middle;
}
}
$ipFlag = fread($fd, 1);
if($ipFlag == chr(1)) {
$ipSeek = fread($fd, 3);
if(strlen($ipSeek) fclose($fd);
return 'System Error';
}
$ipSeek = implode('', unpack('L', $ipSeek.chr(0)));
fseek($fd, $ipSeek);
$ipFlag = fread($fd, 1);
}
if($ipFlag == chr(2)) {
$AddrSeek = fread($fd, 3);
if(strlen($AddrSeek) fclose($fd);
return 'System Error';
}
$ipFlag = fread($fd, 1);
if($ipFlag == 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))
$ipAddr2 .= $char;
$AddrSeek = implode('', unpack('L', $AddrSeek.chr(0)));
fseek($fd, $AddrSeek);
while(($char = fread($fd, 1)) != chr(0))
$ipAddr1 .= $char;
} else {
fseek($fd, -1, SEEK_CUR);
while(($char = fread($fd, 1)) != chr(0))
$ipAddr1 .= $char;
$ipFlag = fread($fd, 1);
if($ipFlag == 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)){
$ipAddr2 .= $char;
}
}
fclose($fd);
//最后做相应的替换操作后返回结果
if(preg_match('/http/i', $ipAddr2)) {
$ipAddr2 = '';
}
$ipaddr = "$ipAddr1 $ipAddr2";
$ipaddr = preg_replace('/CZ88.Net/is', '', $ipaddr);
$ipaddr = preg_replace('/^s*/is', '', $ipaddr);
$ipaddr = preg_replace('/s*$/is', '', $ipaddr);
if(preg_match('/http/i', $ipaddr) || $ipaddr == '') {
$ipaddr = 'Unknown';
}
$ipaddr = iconv('gbk', 'utf-8//IGNORE', $ipaddr); //转换编码，如果网页的gbk可以删除此行
return $ipaddr;
}

function getIpPlace(){
$ip=file_get_contents("http://fw.qq.com/ipaddress");
$ip=str_replace('"',' ',$ip);
$ip2=explode("(",$ip);
$a=substr($ip2[1],0,-2);
$b=explode(",",$a);
return $b;
}
$ip=getIpPlace();
print_r($ip);

$url = "http:www.youdao.com/smartresult-xml/search.s?type=ip&q=".$ip;
$doc = new DOMDocument();
$doc->load($url);
$smartresult = $doc->getElementsByTagName("product");
foreach($smartresult as $product)
{
$locations = $product->getElementsByTagName("location");
$location = $locations->item(0)->nodeValue;
}
if($location != "")
{
echo $i.".".$ip;
echo " 来自".$location."的网友";
}
else
{
echo $i.".".$ip;
echo " 来自火星的网友";
}
public function sinaIPApi($ip){
$str = file_get_contents("http://int.dpool.sina.com.cn/iplookup/iplookup.php?ip=".$ip);
$str = iconv("gbk", "utf-8//IGNORE", $str);
preg_match_all("/[/x{4e00}-/x{9fa5}]+/u",$str,$get);
$add = implode('',$get[0]);
return $add;
}
//$get是一个非常棒的二维数组