Comments on: Restict Logins by IP Address

By: Nickmokisasian

Nickmokisasian — Sat, 25 Feb 2012 07:13:00 +0000

What happens if one of the persons ip address changes?

By: Vinceas3

Vinceas3 — Tue, 29 Nov 2011 21:40:00 +0000

That worked. Franks did not work, unfortunately, kept getting an error for preg match, but this works beautifully. I replaced everything in the for loop with your nice “if” statement, and it works like a charm. Thanks!!

By: Project707

Project707 — Fri, 28 Oct 2011 19:24:00 +0000

Actually you don’t even need the asterisks or to run all of that regex. Just enter the part of the IP you want to match on followed by a “.” so that say, .3 can’t become .345 (unless that’s desired functionality), and then use strpos() which tends to be faster for short string checks like this anyhow.

To do it this way, if your array is:
$ip = array();
$ip[] = ’10.10.3.’;
$ip[] = ’211.109.238.74′;
$ip[] = ’254.254.254.2′;

then this is all you need within the for loop (0 makes sure it matches from the beginning):
if( strpos($_SERVER['REMOTE_ADDR'], $ip[$i]) === 0)
return true;

By: frank

frank — Mon, 27 Dec 2010 22:47:08 +0000

hi roger, not sure I follow why the for loop doesn’t work…

By: roger

roger — Mon, 27 Dec 2010 11:07:03 +0000

loop for doesn’t work. There is return false and return true. Loop will never iterate through count($ip)

By: scott

scott — Thu, 11 Nov 2010 03:12:14 +0000

Any suggestions on how to add masks?
Eg: 10.0.0.1/29 – would allow IP’s 10.0.0.1, 10.0.0.2, 10.0.0.3, 10.0.0.4, 10.0.0.5, 10.0.0.6

By: frank

frank — Tue, 07 Sep 2010 10:25:26 +0000

Thanks Jen, good spotting, all fixed.

By: Jen

Jen — Wed, 15 Apr 2009 09:19:36 +0000

Thanks for the function btw, its been really useful, one small tweak though….

instead of
‘/’.$ipregex.’/’

should be:
‘/^’.$ipregex.’/’

Only because if an allowed IP was
$ip[] = ”211.*.*.*”;

it would also allow an IP of 74.192.211.23

By: Luke Eckley

Luke Eckley — Wed, 15 Oct 2008 15:20:13 +0000

Thanks for the great PHP tip.

By: du

du — Fri, 17 Aug 2007 14:08:20 +0000

thank you. I was trying to make this on my own when I came across yours. Why do more work :) Very nice, short, and simple.