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Function to tell if IP address is in a range
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Subject Author Date
Function to tell if IP address is in a range axlq 07-05-2008
Posted by axlq on July 5, 2008, 2:40 pm
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After failing to find this in my searches, I thought I'd ask
here: Is there a php function that can tell me if an IP address
falls within a range?

Something like this:

$result = is_in_ip_range($_SERVER['REMOTE_ADDR'], '78.157.128.0/19');

I need this for denying access to my web contact form from certain IP
ranges.

I can write my own, but wondered if there's something in the massive
php function library that I overlooked.

-A

Posted by C. (http://symcbean.blogspot.c on July 6, 2008, 6:53 am
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 On Jul 5, 7:40 pm, a...@spamcop.net (axlq) wrote:
> After failing to find this in my searches, I thought I'd ask
> here: Is there a php function that can tell me if an IP address
> falls within a range?
>
> Something like this:
>
> $result = is_in_ip_range($_SERVER['REMOTE_ADDR'], '78.157.128.0/19');
>
> I need this for denying access to my web contact form from certain IP
> ranges.
>
> I can write my own, but wondered if there's something in the massive
> php function library that I overlooked.
>
> -A

There's a PEAR class - Net_IPv4. There are probably other
implementations too - try phpclasses, freshmeat or google.

C.

Posted by Betikci Boris on July 6, 2008, 7:14 am
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On Jul 5, 9:40 pm, a...@spamcop.net (axlq) wrote:
> After failing to find this in my searches, I thought I'd ask
> here: Is there a php function that can tell me if an IP address
> falls within a range?
>
> Something like this:
>
> $result = is_in_ip_range($_SERVER['REMOTE_ADDR'], '78.157.128.0/19');
>
> I need this for denying access to my web contact form from certain IP
> ranges.
>
> I can write my own, but wondered if there's something in the massive
> php function library that I overlooked.
>
> -A

You need to use string manipulation functions to process second
parameter, however your
Function parameters should be like this:
ip_func($_SERVER['REMOTE_ADDR'],<IP TO START>,<IP TO STOP>);

Ex. ip_func($_SERVER['REMOTE_ADDR'] , 78.157.128.0 , 78.157.128.255 );

Posted by axlq on July 6, 2008, 11:34 am
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>On Jul 5, 9:40 pm, a...@spamcop.net (axlq) wrote:
>> After failing to find this in my searches, I thought I'd ask
>> here: Is there a php function that can tell me if an IP address
>> falls within a range?

>Function parameters should be like this:
>ip_func($_SERVER['REMOTE_ADDR'],<IP TO START>,<IP TO STOP>);
>
>Ex. ip_func($_SERVER['REMOTE_ADDR'] , 78.157.128.0 , 78.157.128.255 );

Oh, that's right. If I passed the second two arguments as strings,
I could simply use lexical comparison to determine if the first
argument is between them.

Thanks.
-A

Posted by Jerry Stuckle on July 6, 2008, 3:09 pm
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axlq wrote:
>> On Jul 5, 9:40 pm, a...@spamcop.net (axlq) wrote:
>>> After failing to find this in my searches, I thought I'd ask
>>> here: Is there a php function that can tell me if an IP address
>>> falls within a range?
>
>> Function parameters should be like this:
>> ip_func($_SERVER['REMOTE_ADDR'],<IP TO START>,<IP TO STOP>);
>>
>> Ex. ip_func($_SERVER['REMOTE_ADDR'] , 78.157.128.0 , 78.157.128.255 );
>
> Oh, that's right. If I passed the second two arguments as strings,
> I could simply use lexical comparison to determine if the first
> argument is between them.
>
> Thanks.
> -A
>

Is 101.01.01.01 within the range of 98.98.98.98 and 110.110.110.110?
Passed as a string, it is not.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================


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