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Getting the visitor's IP

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Getting the visitor's IP
duffsstuff
11 Oct, 2006 - 03:40 PM
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So I am now working on a small script to echo a URL to a Administration page If the Remote Address is 71.134.229.249. This is what I have so far:

CODE

<?php
      if (['REMOTE_ADDR'])==(['71.134.229.249')
          echo "<a href="#">Administration</a>"
  ?>


1) I don't know how to compare the remote Address to the corresponding one
2) I don't think I did the link is right in the "echo" line
3) Do I need an else variable?

- Thanks biggrin.gif

This post has been edited by hotsnoj: 11 Oct, 2006 - 05:40 PM
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snoj
RE: Getting The Visitor's IP
11 Oct, 2006 - 05:47 PM
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$Null
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Well first off, that syntax will never run.

The $_SERVER['REMOTE_ADDR'] variable is the ip address of the computer making the request (so it could very well be a proxy ip you get). While this "authentication" is easy, it isn't entirely safe either. Because now ANYONE using your computer can access the administration without a username or password. And conversely, if you're on dialup, any other customer could get access. And there is also the point that you can't log in on someone else's computer (like a friends or at the library) and administrate.

Anyway, fixed code.
CODE
<?php
      if ($_SERVER['REMOTE_ADDR']=='71.134.229.249') {
          echo "<a href="#">Administration</a>";
      }
  ?>
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duffsstuff
RE: Getting The Visitor's IP
12 Oct, 2006 - 03:08 PM
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I don't think the link is working because of the quotes. Is there some other way to put in quotes?

Thanks and I, see my errors, how would I then make it search a txt file with all the admin's IPs? So it's not just one.

P.S.
I plan to set up a second security step where when your Ip is right and you link to the page it asks you to login, it contacts my MySQL server, on a separate table from users and verifies you are an admin. Then it will take you to the administration page.

This post has been edited by duffsstuff: 12 Oct, 2006 - 03:14 PM
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AYYASH
RE: Getting The Visitor's IP
12 Oct, 2006 - 04:12 PM
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In order for the script to be working well you should escape the double qouts inside the HTML element by using back slash or use single qoute instead to be like this ...href='#'>...

CODE
<?php
      if ($_SERVER['REMOTE_ADDR']=='71.134.229.249') {
          echo "<a href=\"#\">Administration</a>";
      }
?>


good luck

This post has been edited by AYYASH: 12 Oct, 2006 - 05:24 PM
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duffsstuff
RE: Getting The Visitor's IP
12 Oct, 2006 - 04:58 PM
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thanks, everything seems to be working now.
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Wild_Rose
RE: Getting The Visitor's IP
3 Jun, 2007 - 01:04 PM
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how I put a range for some IPs?
for example if I want all the IPs from 213.5.58.247 to 213.5.58.250?

so far I have this

CODE
$IP = $_SERVER['REMOTE_ADDR'];

    if ($IP=='213.5.58.247')
    { $content.="<br><br>you're at <b>school</b>!";}
    
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snoj
RE: Getting The Visitor's IP
3 Jun, 2007 - 02:37 PM
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Regular expressions...or just match the first X number of characters in the address.
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Wild_Rose
RE: Getting The Visitor's IP
3 Jun, 2007 - 02:56 PM
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I tried this
CODE
    if ($IP>='195.130.92.69' AND $IP<='195.130.92.89')
    { $content.="<br><br>you're at home!";}


but it doesn't work sad.gif
and I can't leave the last X numbers because that doesn't bring the right results in this case.
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snoj
RE: Getting The Visitor's IP
3 Jun, 2007 - 04:04 PM
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It doesn't work because those are strings which in this case are likely converted to floats (or at best integers) to be compared against whatever $IP holds.

What I spoke of in comparing the first so many characters is using something like substr() to grab only the part of the IP you wish to check against.

Another thing you could try is putting all IP's in an array and then use something like in_array() to see if the IP of the client are valid or in the range specified.
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Wild_Rose
RE: Getting The Visitor's IP
4 Jun, 2007 - 07:00 AM
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I thought so... I just wanted to see if there's an easier solution tongue.gif
thanks!
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burial
RE: Getting The Visitor's IP
4 Jun, 2007 - 06:31 PM
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You can use .htaccess authorization, too.
Put this in your httpd.conf to enable .htaccess:

CODE
AccessFileName .htaccess

<FilesMatch "^\.ht">
    Order allow,deny
    Deny from all
</FilesMatch>


And put this in .htaccess file in your root folder:

CODE
AuthName "What?"
AuthType Basic
<Limit GET POST>
order deny,allow
deny from all
allow from 127.0.0.1
</Limit>


This will allow only users with IP 127.0.0.1 to access the page ;]

Good luck!
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trashofmasters
RE: Getting The Visitor's IP
11 Jun, 2007 - 02:04 AM
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QUOTE(Wild_Rose @ 3 Jun, 2007 - 03:56 PM) *

I tried this
CODE
    if ($IP>='195.130.92.69' AND $IP<='195.130.92.89')
    { $content.="<br><br>you're at home!";}


but it doesn't work sad.gif
and I can't leave the last X numbers because that doesn't bring the right results in this case.

To compare ips you should convert them into integers :
ip2long() and long2ip() functions.
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