Php: Managing IP addresses

[WoogieNoogie]

I like it! Nice and simple.

One thing I would change...I would think it to be more efficient:

if($ipaddress=="xxx.xxx.xxx") {
}
if($ipaddress=="xxx.xxx.xxx") {
}

I personally would change those to elseif statements. Such as...

if ($ipaddress == "xxx.xxx.xxx") {
} elseif ($ipaddress == "xxx.xxx.xxx") {
} else {
}

It doesn't make much of a difference, I belive, but I like seeing it all through one statement.

All in all, I like the tutorial :)

[DashDingo]

omg it sux

Just kidding mate :) It looks awesome.

[henke37]

The page doesn't stop executing after the header is changed.
A hacker only have to use a http filter that filters all redircts to google.
You need to stop more of the page from being executed.

[Storm]

At 3/17/06 11:28 AM, Ca1um wrote: After the user is redirected to Google the script will die :)

Poor old script! =P

Anyway, nice job. This is usefull for stuff like IP banning, right?
And what happens if someone changes thier IP (if its possible...)?

[cherries]

or:

<?
$ips = array ('41556414', '556677');
$ip = $_SERVER['REMOTE_ADDR'];

if (in_array($ip, $ips)) {
echo "<h1>YOU ARE TEH BANNED!11</h1>";
exit;
}
?>

[DarkMana]

At 7/29/06 04:30 PM, --Storm-- wrote: And what happens if someone changes thier IP (if its possible...)?

I think it's possible by going into the command prompt and removing your current IP address and then renewing it. I've done it before, but I didn't pay attention to if the address actually changed.

[elbekko]

Normally you should get a new IP every time you reconnect to the internet.

[thecoshman]

At 7/30/06 10:57 AM, elbekko wrote: Normally you should get a new IP every time you reconnect to the internet.

Not always true, if you use a dial-up modem, tehn every time you connect you do get a new ip.

if you use adsl, you tend to get the same ip for a while, but it can change.

if you havve proper broad band, like blue yonder or what have you, you are given a fixed ip, it is your ip for ever and ever!

[thecoshman]

with this thing though, if you have a form that user clicks submit on, that take them to antother page. i think these seems to get the ip of the requesting thing, which in this case seems to be the server. cose i keep loging that same ip addres for a few people, which of couse is higly unlikly. would i need to get their ip befor hand, and post that data with the form as a hidden variable?

[Mister-Mind]

At 7/29/06 06:37 PM, cherries wrote: or:

<?
$ips = array ('41556414', '556677');
$ip = $_SERVER['REMOTE_ADDR'];

if (in_array($ip, $ips)) {
echo "<h1>YOU ARE TEH BANNED!11</h1>";
exit;
}
?>

or

<?php
$ban_ip = ("xxx.xxx.xxx");
$visitor_ip = $_SERVER['REMOTE_ADDR'];
$ip_list = explode(",", $ban_ip);
foreach($ip_list as $ip)
{
if($visitor_ip == $ip)
{
die("<h2> YOUR BANNED!");
}
}

?>

[different]

Switch can come in handy...

<?php
$ipaddress = $_SERVER['REMOTE_ADDR']; // Sets the variable to the users IP address
switch ($ipaddress) {
case "xxx.xxx.xxx": // This checks to see if an IP address is whatever
echo "[b][u]Hello webmaster![/b][/u]"; // If the user has that IP address, it will echo this
break;
case "xxx.xxx.xxx": // Checks to see if that is the IP address of the user
echo "This is a special message! <br> You are cool!"; // If the user has that IP address, it will echo this
break;
case "xxx.xxx.xxx": // Checks to see if that is the IP address of the user
header('Location: http://www.google.com/'); // If the user dose have this IP address the header will be changed to google.com and they will be redirected
die();
break;
default: // If their IP address is anything else
echo ""; // Then it will echo nothing
break;
}
?>

[Thomas]

Well I'm trying to use this to check IP,and if it is a certain IP(like in this tutorial),it will redirect,but I'm getting an error.

Error on index,top of page

I'm including a file with the code:

<?
$ip = $_SERVER['REMOTE_ADDR'];
$ip2 = $ip;

if($ip == $ip2){
header('Location:http://the-toon.net/banned.p hp/');
}
?>

In the code,it will just refer the person because the redirection IP is whoever visits the page(just for testing).

[DFox]

At 5/10/07 09:58 PM, Thomas wrote: In the code,it will just refer the person because the redirection IP is whoever visits the page(just for testing).

Any header modification must be done before anything is outputted to the browser.

If you can't do that, then check out output buffering in PHP: Main.