PHP判断IP并转跳到相应城市分站的方法_PHP教程

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;