How to use PHP to determine the IP and redirect to the corresponding city branch

How to use PHP to determine the IP and redirect to the corresponding city branch_PHP Tutorial

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Release： 2016-07-13 10:00:19

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How PHP determines IP and redirects to the corresponding city sub-station

This article mainly introduces the method of PHP determining IP and redirecting to the corresponding city sub-station, example analysis Learned the skills of php parsing URL and jumping, which has certain reference value. Friends who need it can refer to it

The example in this article describes how PHP determines the IP and redirects to the corresponding city sub-station. Share it with everyone for your reference. The specific implementation method is as follows:

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class QQWry{

var $StartIP=0;

var $EndIP=0;

var $Country='';

var $Local='';

var $CountryFlag=0;

//Identifies the Country location

// 0x01, followed by 3 bytes for Country offset, no Local

// 0x02, followed by 3 bytes for Country offset, followed by Local

// Others, Country, Local, and Local have similar compression. Possible multiple references.

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='Unknown' ;

$this->Local='' ;

}

fclose ( $this->fp );

$this->Country=preg_replace("/(CZ88.NET)|(Innocent Network)/","LAN/Unknown",$this->Country);

$this->Local=preg_replace("/(CZ88.NET)|(Innocent Network)/","LAN/Unknown",$this->Local);

///////////////Look at the values 0 and 3 of $nRet above, so comment out the following lines

return $nRet ;

//return "$this->Country $this->Local";#Just return the location and country directly

}

function IpToInt($Ip) {

$array=explode('.',$Ip);

$Int=($array[0] * 256*256*256) ($array[1]*256*256) ($array[2]*256) $array[3];

return $Int;

}

An example demonstration is as follows:

$QQWry=new QQWry;

$QQWry->QQWry("60.31.95.255");

$country = $QQWry->Country;

echo $QQWry->Country.",".$QQWry->Local;

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I hope this article will be helpful to everyone’s PHP programming design.

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