PHP判斷IP並轉跳到相應城市分站的方法

 這篇文章主要介紹了PHP判斷IP並轉跳到相應城市分站的方法,實例分析了php解析URL及跳轉的技巧,具有一定參考借鑒價值,需要的朋友可以參考下

   

本文實例講述了PHP判斷IP並轉跳到相應城市分站的方法。分享給大家供大家參考。具體實現方法如下：

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 <?php class QQWry{ var $StartIP=0; var $EndIP=0; var $Country=''; var $Local=''; var $CountryFlag=0; // 標識 Country位置 // 0x01,隨後3字節為Country偏移,沒有Local // 0x02,隨後3字節為Country偏移，接著是Local // 其他,Country,Local,Local有類似的壓縮。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)){$this->Country="本地網絡";return ;} elseif(preg_match("/^192/",$dotip)) {$this->Country="局域網";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 ( ) ; //這樣不太好..............所以.......... $this->Local=str_replace("area error", "",$this->Local); } else{ $nRet=3 ; $this->Country='未知' ; $this->Local='' ;