本文实例讲述了PHP判断IP并转跳到相应城市分站的方法。分享给大家供大家参考。具体实现方法如下：
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<?php class QQWry{ var $StartIP=0; var $EndIP=0; var $Country=''; var $Local=''; var $CountryFlag=0;// 标识 Country位置 // 0x01,随后3字节为Country偏移,没有Local // 0x02,随后3字节为Country偏移，接着是Local // 其他,Country,Local,Local有类似的压缩。可能多重引用。 var $fp; var $FirstStartIp=0; var $LastStartIp=0; var $EndIpOff=0 ; function getStartIp($RecNo){ $offset=$this->FirstStartIp+$RecNo * 7 ; @fseek($this->fp,$offset,SEEK_SET) ; $buf=fread($this->fp ,7) ; $this->EndIpOff=ord($buf[4])+(ord($buf[5])*256)+(ord($buf[6])*256*256); $this->StartIp=ord($buf[0])+(ord($buf[1])*256)+(ord($buf[2])*256*256)+(ord($buf[3])*256*256*256); return $this->StartIp; } function getEndIp(){ @fseek ( $this->fp , $this->EndIpOff , SEEK_SET ) ; $buf=fread ( $this->fp , 5 ) ; $this->EndIp=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256); $this->CountryFlag=ord ( $buf[4] ) ; return $this->EndIp ; } function getCountry(){ switch ( $this->CountryFlag ) { case 1: case 2: $this->Country=$this->getFlagStr ( $this->EndIpOff+4) ; //echo sprintf('EndIpOffset=(%x)',$this->EndIpOff ); $this->Local=( 1 == $this->CountryFlag )? '' : $this->getFlagStr ( $this->EndIpOff+8); break ; default : $this->Country=$this->getFlagStr ($this->EndIpOff+4); $this->Local=$this->getFlagStr ( ftell ( $this->fp )); } } function getFlagStr ($offset){ $flag=0 ; while(1){ @fseek($this->fp ,$offset,SEEK_SET) ; $flag=ord(fgetc($this->fp ) ) ; if ( $flag == 1 || $flag == 2 ) { $buf=fread ($this->fp , 3 ) ; if ($flag==2){ $this->CountryFlag=2; $this->EndIpOff=$offset - 4 ; } $offset=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])* 256*256); } else{ break ; } } if($offset<12) return ''; @fseek($this->fp , $offset , SEEK_SET ) ; return $this->getStr(); } function getStr ( ) { $str='' ; while ( 1 ) { $c=fgetc ( $this->fp ) ; //echo "$cn" ; if(ord($c[0])== 0 ) break ; $str.= $c ; } //echo "$str n"; return $str ; } function qqwry ($dotip='') { if( !is_string($dotip) || $dotip==''){return;} if(preg_match("/^127/",$dotip)){$this->Country="本地网络";return ;} elseif(preg_match("/^192/",$dotip)) {$this->Country="局域网";return ;} $nRet; $ip=$this->IpToInt ( $dotip ); $this->fp= fopen(__QQWRY__, "rb"); if ($this->fp == NULL) { $szLocal= "OpenFileError"; return 1; } @fseek ( $this->fp , 0 , SEEK_SET ); $buf=fread ( $this->fp , 8 ); $this->FirstStartIp=ord($buf[0]) + (ord($buf[1])*256) + (ord($buf[2])*256*256) + (ord($buf[3])*256*256*256); $this->LastStartIp=ord($buf[4]) + (ord($buf[5])*256) + (ord($buf[6])*256*256) + (ord($buf[7])*256*256*256); $RecordCount= floor(($this->LastStartIp - $this->FirstStartIp) / 7); if ($RecordCount <= 1){ $this->Country="FileDataError"; fclose($this->fp) ; return 2 ; } $RangB= 0; $RangE= $RecordCount; // Match ... while ($RangB < $RangE-1) { $RecNo= floor(($RangB + $RangE) / 2); $this->getStartIp ( $RecNo ) ; if ( $ip == $this->StartIp ) { $RangB=$RecNo ; break ; } if ($ip>$this->StartIp) $RangB= $RecNo; else $RangE= $RecNo; } $this->getStartIp ( $RangB ) ; $this->getEndIp ( ) ; if ( ( $this->StartIp <= $ip ) && ( $this->EndIp >= $ip ) ){ $nRet=0 ; $this->getCountry ( ) ; //这样不太好..............所以.......... $this->Local=str_replace("area error", "",$this->Local); } else{ $nRet=3 ; $this->Country='未知' ; $this->Local='' ; } fclose ( $this->fp ); $this->Country=preg_replace("/(CZ88.NET)|(纯真网络)/","局域网/未知",$this->Country);$this->Local=preg_replace("/(CZ88.NET)|(纯真网络)/","局域网/未知",$this->Local); //////////////看看 $nRet在上面的值是什么0和3，于是将下面的行注释掉 return $nRet ; //return "$this->Country $this->Local";#如此直接返回位置和国家便可以了 } function IpToInt($Ip) { $array=explode('.',$Ip); $Int=($array[0] * 256*256*256) + ($array[1]*256*256) + ($array[2]*256) + $array[3]; return $Int; } } ?> |
实例演示如下：
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$QQWry=new QQWry;$QQWry->QQWry("60.31.95.255");$country = $QQWry->Country;echo $QQWry->Country.",".$QQWry->Local; |
希望本文所述对大家的php程序设计有所帮助。
