Archive for the 'Programming' Category

If you would like to redirect browsers based on their IP the following method can be used to handle multiple IP’s.  You can choose to redirect entire networks or a single ip.

<?php
//array of ip’s you wish to block. Note that you can block an
//entire class by replacing it with 0, so to block [...]

Most of our hosting servers run Centos Linux but we have Windows servers too and a problem common to both is the occasional high volume of traffic generated by non organic growth.  I don’t mean that someones blog hits the front page of digg, rather a malicious or DDOS attack against a website.  On shared [...]

On more than one occasion these characters  have turned up just when everything else seems fine.  Known as a “BOM” or Byte Order Mark they can be extremely annoying.
What is  ???
 is often seen at the top left corner of a web page.  When you open the source file and compare that to [...]

To remove stuff such as punction and spaces (or anything you want) from a text box before sending to the server for validation you can use code like this, first the HTML:-

<input
name="name"
onblur="this.value = entrycheck(this.value);"
type="text"
size="20">

And then the following Javascript will remove invalid characters when the user moves to another field:-

<script type="text/javascript">
function namecheck(theInput) [...]

It wasn’t long before I needed to expand upon banning a few IP’s. I needed to be able to ban whole networks so here’s the Q&D solution:-
First create a text file called ipsec.txt and enter some IP’s you wish to ban, to ban a network just leave off the end of the IP class [...]