php判断ip并转跳到相应城市分站的方法，ip分站本文实例讲述了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：
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($offsetfp , $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 country=filedataerror; fclose($this->fp) ; return 2 ; } $rangb= 0; $range= $recordcount; // match ... while ($rangb 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 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。
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