php读取纯真ip数据库的例子_PHP教程

<!--?<span php
</span--><span *<="" span=""><span --------------------------------------------------="" ip2address="" [qqwry.dat]="" --------------------------------------------------<="" span=""><span *="" <="" span="">
<span class<="" span=""><span ip="" {="" <="" span=""><span var<="" span=""> <span $fh<="" span="">; <span <="" span=""><span ip数据库文件句柄<="" span="">
<span var<="" span=""> <span $first<="" span="">; <span <="" span=""><span 第一条索引<="" span="">
<span var<="" span=""> <span $last<="" span="">; <span <="" span=""><span 最后一条索引<="" span="">
<span var<="" span=""> <span $total<="" span="">; <span <="" span=""><span 索引总数="" 构造函数<="" span="">
<span function<="" span=""><span __construct()="" {="" <="" span=""><span $this<="" span="">->fh = <span fopen<="" span="">('qqwry.dat', 'rb'); <span <="" span=""><span qqwry.dat文件<="" span="">
<span $this<="" span="">->first = <span $this<="" span="">-><span getlong4();="" <="" span=""><span $this<="" span="">->last = <span $this<="" span="">-><span getlong4();="" <="" span=""><span $this<="" span="">->total = (<span $this<="" span="">->last - <span $this<="" span="">->first) / 7; <span <="" span=""><span 每条索引7字节<="" span="">
<span }="" <="" span=""><span <="" span=""><span 检查ip合法性<="" span="">
<span function<="" span=""> checkIp(<span $ip<="" span=""><span )="" {="" <="" span=""><span $arr<="" span=""> = <span explode<="" span="">('.',<span $ip<="" span=""><span );="" <="" span=""><span if<="" span="">(<span count<="" span="">(<span $arr<="" span="">) !=4<span )="" {="" <="" span=""><span return<="" span=""> <span false<="" span=""><span ;="" }="" <="" span=""><span else<="" span=""><span {="" <="" span=""><span for<="" span=""> (<span $i<="" span="">=0; <span $i<="" span=""> < 4; <span $i<="" span="">++<span )="" {="" <="" span=""><span if<="" span=""> (<span $arr<="" span="">[<span $i<="" span="">] <'0' || <span $arr<="" span="">[<span $i<="" span="">] > '255'<span )="" {="" <="" span=""><span return<="" span=""> <span false<="" span=""><span ;="" }="" <="" span=""><span <="" span=""><span 脚本学堂="" www.jbxue.com<="" span="">
<span }="" <="" span=""><span return<="" span=""> <span true<="" span=""><span ;="" }="" <="" span=""><span function<="" span=""><span getlong4()="" {="" <="" span=""><span <="" span=""><span 读取little-endian编码的4个字节转化为长整型数<="" span="">
<span $result<="" span=""> = <span unpack<="" span="">('Vlong', <span fread<="" span="">(<span $this<="" span="">->fh, 4<span ));="" <="" span=""><span return<="" span=""> <span $result<="" span="">['long'<span ];="" }="" <="" span=""><span function<="" span=""><span getlong3()="" {="" <="" span=""><span <="" span=""><span 读取little-endian编码的3个字节转化为长整型数<="" span="">
<span $result<="" span=""> = <span unpack<="" span="">('Vlong', <span fread<="" span="">(<span $this<="" span="">->fh, 3).<span chr<="" span="">(0<span ));="" <="" span=""><span return<="" span=""> <span $result<="" span="">['long'<span ];="" }="" <="" span=""><span <="" span=""><span 查询信息<="" span="">
<span function<="" span=""> getInfo(<span $data<="" span=""> = ""<span )="" {="" <="" span=""><span $char<="" span=""> = <span fread<="" span="">(<span $this<="" span="">->fh, 1<span );="" <="" span=""><span while<="" span=""> (<span ord<="" span="">(<span $char<="" span="">) != 0) { <span <="" span=""><span 国家地区信息以0结束<="" span="">
<span $data<="" span=""> .= <span $char<="" span=""><span ;="" <="" span=""><span $char<="" span=""> = <span fread<="" span="">(<span $this<="" span="">->fh, 1<span );="" }="" <="" span=""><span return<="" span=""> <span $data<="" span=""><span ;="" }="" <="" span=""><span <="" span=""><span 查询地区信息<="" span="">
<span function<="" span=""><span getarea()="" {="" <="" span=""><span $byte<="" span=""> = <span fread<="" span="">(<span $this<="" span="">->fh, 1); <span <="" span=""><span 标志字节<="" span="">
<span switch<="" span=""> (<span ord<="" span="">(<span $byte<="" span=""><span ))="" {="" <="" span=""><span case<="" span=""> 0: <span $area<="" span=""> = ''; <span break<="" span="">; <span <="" span=""><span 没有地区信息<="" span="">
<span case<="" span=""> 1: <span <="" span=""><span 地区被重定向<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $this<="" span="">-><span getlong3());="" <="" span=""><span $area<="" span=""> = <span $this<="" span="">->getInfo(); <span break<="" span=""><span ;="" <="" span=""><span case<="" span=""> 2: <span <="" span=""><span 地区被重定向<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $this<="" span="">-><span getlong3());="" <="" span=""><span $area<="" span=""> = <span $this<="" span="">->getInfo(); <span break<="" span=""><span ;="" <="" span=""><span default<="" span="">: <span $area<="" span=""> = <span $this<="" span="">->getInfo(<span $byte<="" span="">); <span break<="" span="">; <span <="" span=""><span 地区没有被重定向<="" span="">
<span }="" <="" span=""><span return<="" span=""> <span $area<="" span=""><span ;="" }="" <="" span=""><span function<="" span=""> ip2addr(<span $ip<="" span=""><span )="" {="" <="" span=""><span if<="" span="">(!<span $this<="" span=""> -> checkIp(<span $ip<="" span=""><span )){="" <="" span=""><span return<="" span=""> <span false<="" span=""><span ;="" }="" <="" span=""><span $ip<="" span=""> = <span pack<="" span="">('N', <span intval<="" span="">(<span ip2long<="" span="">(<span $ip<="" span=""><span )));="" <="" span=""><span <="" span=""><span 二分查找<="" span="">
<span $l<="" span=""> = 0<span ;="" <="" span=""><span $r<="" span=""> = <span $this<="" span="">-><span total;="" <="" span=""><span while<="" span="">(<span $l<="" span=""> <= <span $r<="" span=""><span )="" {="" <="" span=""><span $m<="" span=""> = <span floor<="" span="">((<span $l<="" span=""> + <span $r<="" span="">) / 2); <span <="" span=""><span 计算中间索引<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $this<="" span="">->first + <span $m<="" span=""> * 7<span );="" <="" span=""><span $beginip<="" span=""> = <span strrev<="" span="">(<span fread<="" span="">(<span $this<="" span="">->fh, 4)); <span <="" span=""><span 中间索引的开始ip地址<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $this<="" span="">-><span getlong3());="" <="" span=""><span $endip<="" span=""> = <span strrev<="" span="">(<span fread<="" span="">(<span $this<="" span="">->fh, 4)); <span <="" span=""><span 中间索引的结束ip地址<="" span="">
<span if<="" span=""> (<span $ip<="" span=""> < <span $beginip<="" span="">) { <span <="" span=""><span 用户的ip小于中间索引的开始ip地址时<="" span="">
<span $r<="" span=""> = <span $m<="" span=""> - 1<span ;="" }="" <="" span=""><span else<="" span=""><span {="" <="" span=""><span if<="" span=""> (<span $ip<="" span=""> > <span $endip<="" span="">) { <span <="" span=""><span 用户的ip大于中间索引的结束ip地址时<="" span="">
<span $l<="" span=""> = <span $m<="" span=""> + 1<span ;="" }="" <="" span=""><span else<="" span=""> { <span <="" span=""><span 用户ip在中间索引的ip范围内时<="" span="">
<span $findip<="" span=""> = <span $this<="" span="">->first + <span $m<="" span=""> * 7<span ;="" <="" span=""><span break<="" span=""><span ;="" }="" <="" span=""><span <="" span=""><span 查询国家地区信息<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $findip<="" span=""><span );="" <="" span=""><span $location<="" span="">['beginip'] = <span long2ip<="" span="">(<span $this<="" span="">->getLong4()); <span <="" span=""><span 用户ip所在范围的开始地址<="" span="">
<span $offset<="" span=""> = <span $this<="" span="">-><span getlong3();="" <="" span=""><span fseek<="" span="">(<span $this<="" span="">->fh, <span $offset<="" span=""><span );="" <="" span=""><span $location<="" span="">['endip'] = <span long2ip<="" span="">(<span $this<="" span="">->getLong4()); <span <="" span=""><span 用户ip所在范围的结束地址<="" span="">
<span $byte<="" span=""> = <span fread<="" span="">(<span $this<="" span="">->fh, 1); <span <="" span=""><span 标志字节<="" span="">
<span switch<="" span=""> (<span ord<="" span="">(<span $byte<="" span=""><span ))="" {="" <="" span=""><span case<="" span=""> 1: <span <="" span=""><span 国家和区域信息都被重定向<="" span="">
<span $countryoffset<="" span=""> = <span $this<="" span="">->getLong3(); <span <="" span=""><span 重定向地址<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $countryoffset<="" span=""><span );="" <="" span=""><span $byte<="" span=""> = <span fread<="" span="">(<span $this<="" span="">->fh, 1); <span <="" span=""><span 标志字节<="" span="">
<span switch<="" span=""> (<span ord<="" span="">(<span $byte<="" span=""><span ))="" {="" <="" span=""><span case<="" span=""> 2: <span <="" span=""><span 国家信息被二次重定向<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $this<="" span="">-><span getlong3());="" <="" span=""><span $location<="" span="">['country'] = <span $this<="" span="">-><span getinfo();="" <="" span=""><span fseek<="" span="">(<span $this<="" span="">->fh, <span $countryoffset<="" span=""> + 4<span );="" <="" span=""><span $location<="" span="">['area'] = <span $this<="" span="">-><span getarea();="" <="" span=""><span break<="" span=""><span ;="" <="" span=""><span default<="" span="">: <span <="" span=""><span 国家信息没有被二次重定向<="" span="">
<span $location<="" span="">['country'] = <span $this<="" span="">->getInfo(<span $byte<="" span=""><span );="" <="" span=""><span $location<="" span="">['area'] = <span $this<="" span="">-><span getarea();="" <="" span=""><span break<="" span=""><span ;="" }="" <="" span=""><span break<="" span=""><span ;="" <="" span=""><span case<="" span=""> 2: <span <="" span=""><span 国家信息被重定向<="" span="">
<span fseek<="" span="">(<span $this<="" span="">->fh, <span $this<="" span="">-><span getlong3());="" <="" span=""><span $location<="" span="">['country'] = <span $this<="" span="">-><span getinfo();="" <="" span=""><span fseek<="" span="">(<span $this<="" span="">->fh, <span $offset<="" span=""> + 8<span );="" <="" span=""><span $location<="" span="">['area'] = <span $this<="" span="">-><span getarea();="" <="" span=""><span break<="" span=""><span ;="" <="" span=""><span default<="" span="">: <span <="" span=""><span 国家信息没有被重定向<="" span="">
<span $location<="" span="">['country'] = <span $this<="" span="">->getInfo(<span $byte<="" span=""><span );="" <="" span=""><span $location<="" span="">['area'] = <span $this<="" span="">-><span getarea();="" <="" span=""><span break<="" span=""><span ;="" }="" <="" span=""><span <="" span=""><span gb2312="" to="" utf-8（去除无信息时显示的cz88.net）<="" span="">
<span foreach<="" span=""> (<span $location<="" span=""> <span as<="" span=""> <span $k<="" span=""> => <span $v<="" span=""><span )="" {="" <="" span=""><span $location<="" span="">[<span $k<="" span="">] = <span str_replace<="" span="">('CZ88.NET','',<span iconv<="" span="">('gb2312', 'utf-8', <span $v<="" span=""><span ));="" }="" <="" span=""><span return<="" span=""> <span $location<="" span=""><span ;="" }="" <="" span=""><span <="" span=""><span 析构函数<="" span="">
<span function<="" span=""><span __destruct()="" {="" <="" span=""><span fclose<="" span="">(<span $this<="" span="">-><span fh);="" }="" <="" span=""><span $ip<="" span=""> = <span new<="" span=""><span ip();="" <="" span=""><span $addr<="" span=""> = <span $ip<="" span=""> -> ip2addr('IP地址'<span );="" <="" span=""><span print_r<="" span="">(<span $addr<="" span=""><span );="" <="" span="">?></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

http://www.bkjia.com/PHPjc/750882.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/750882.htmlTechArticle代码： ? ; ; ; ; -fh = ('qqwry.dat', 'rb'); -first = - -last = - -total = ( -last - -first) / 7; checkIp( = ('.', ( ( ) !=4 ( =0; 4; ++ ( [ ] '0' || [ ] '255' = ('Vlong', ( -fh,...