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://jb51.cc) |
'~-----------------------------------------------------------~
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://jb51.cc) |
'~-----------------------------------------------------------~
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://jb51.cc) |
**************************************************************/
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://jb51.cc) |
**************************************************************/
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,''))
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~ 原文链接:https://www.f2er.com/php/25870.html