PHP判断IP并转跳到相应城市分站的方法


            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：





<?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：







$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。