PHP 将IP地址转换为整型数字的PHP方法、Asp方法和MsSQL方法、html' target='_blank'>MySQL方法 首先我们要先了解一下IP地址转换为整型(严格来说应该说是长整型)的原理~【转换原理】:假设IP为:w.x.y.z,则IP地址转为整型数字的计算公式为:intIP = 256*256*256*w + 256*256*x + 256*y + z【PHP的互转】:PHP的转换方式比较简单,它内置了两个函数 int ip2long ( string $ip_address )和 string long2ip ( string $proper_address ) 可以直接调用使用~【Asp的互转】:自定义函数如下, '.-----------------------------------------------------------. '| describtion: 将IP转换为int型数字 | '| Authors: abandonship(http://phpstudy.net) | '~-----------------------------------------------------------~ Function IP2Num(ByVal strIP) Dim nIP Dim nIndex Dim arrIP arrIP = Split(strIP, ".", 4) For nIndex = 0 To 3 If Not nIndex = 3 Then arrIP(nIndex) = arrIP(nIndex) * (256 ^ (3 - nIndex)) End If nIP = nIP + arrIP(nIndex) Next IP2Num = nIP End Function '.-----------------------------------------------------------. '| describtion: 将int型数字转换为IP | '| Authors: abandonship(http://phpstudy.net) | '~-----------------------------------------------------------~ Function Num2IP(ByVal nIP) Dim strIP Dim nTemp Dim nIndex For nIndex = 3 To 0 Step -1 nTemp = Int(nIP / (256 ^ nIndex)) strIP = strIP & nTemp & "." nIP = nIP - (nTemp * (256 ^ nIndex)) Next strIP = Left(strIP, Len(strIP) - 1) Num2IP = strIP End Function【MsSQL的互转】:自定义函数如下, /*************************************************************** *将IP转换为int型数字 | *Code CreateBy abandonship(http://phpstudy.net) | **************************************************************/ CREATE FUNCTION [dbo].[ipToInt]( @strIp varchar(15) )RETURNS bigint AS BEGIN declare @nIp bigint set @nIp = 0 select @nIp = @nIp + LEFT( @strIp, charindex('.',@strIp+'.')-1)*Id from( select Id = cast(1*256*256*256 as bigint) union all select 1*256*256 union all select 1*256 union all select 1 ) as T return (@nIp) END
/*************************************************************** *将int型数字转换为IP | *Code CreateBy abandonship(http://phpstudy.net) | **************************************************************/ CREATE FUNCTION [dbo].[intToIP]( @nIp bigint )RETURNS varchar(15) As BEGIN declare @strIp varchar(15) set @strIp = '' select @strIp = @strIp +'.'+ cast(@nIp/ID as varchar), @nIp = @nIp%ID from( select ID = cast(1*256*256*256 as bigint) union all select 1*256*256 union all select 1*256 union all select 1 ) as T return(stuff(@strIp,1,1,'')) END 【MySQL的互转】:相对于MsSQL来说MySQL的转换方式比较简单,它和PHP一样也内置了两个函数 IP转为整型: select INET_ATON (IP地址) 和 整型转为IP: select INET_NTOA ( IP的整型数值 ) 可以直接调用使用~PHP教程