blocking ip range

[greychops]

I want to not have my ads appear to me or friends.
I have the ips, but they are dynamic so I want to block ip ranges from my ads.
So far I have

<?php
$ip = $_SERVER['REMOTE_ADDR'];
if ($ip == '12.123' OR $ip =='12.123.' OR $ip == '12.123....*)
{
null;
}else{include ("http://www.aaaaaaaaa.com/ad.html");}
?>

The various attempts at using wild cards above did not work. The only way I have been able to not include the ad is if I type an entire ip.
Any suggestions how to not include ads for 123.123..?

[dougal85]

why not just use adblock in firefox?

[greychops]

I can't control the browser of family , and I don't want them to accidentally click ads.

[superwormy]

www.php.net/fnmatch
www.php.net/ereg

You could also use CIDR notation and write your own little function to do the CIDR comparisons. If you look here and search for CIDR in the comments, you'll find some already written for you:
www.php.net/ip2long