This is a simple small piece of code that allows you to ban visitors fro viewing your webpage, if you know their ip adresses…

This can be made much more advanced.

With the use of a database such as Mysq (or in some cases just a textfile),  you can create a management system for adding, editing and deleting blacklisted ips.

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<?PHP
$ip = $_SERVER['REMOTE_ADDR'];
$ban = array(
"74.89.41.93",
"123.40.1.63",
);
 
if(in_array($ip, $ban)){
die("Sorry, you are banned!");
}
?>

Explained:

The first line, gets the visitors ip, the second line creates an
array of the blacklisted ip adresses.

The IF statement, checks if the visitors ip is blacklisted, if true, it stops loading
of the webpage and shows the error message.

Usage:

Put the code at the very top of your .php document.

If anyone want a more advanced method to do this (with all the editing and stuff), drop me a comment below :)

This entry was posted on Sunday, July 15th, 2007 at 1:28 am and is filed under php. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.