PHP Live Chat Scripts

Following are two good chat scripts which are easy to integrate and have extensive functionality.
1. Free Live Chat by Comm100
2. Helpcenter Live Support

How to add a navigation menu

A simple jquery based navigation menu which is very easy to configure and customize can be found here.

Jquery Slider

A cool and easy to integrate Jquery Slider with few options can be found here
http://pikachoose.com/

How to split data in php

You can use the explode function to split data in PHP.

$url = "http://www.domain.com/images.jpg";

$data = explode("/", $url);

$var = $data[count($data) - 1];

Adding a dynamic navigation bar

To add a dynamic navigation bar you can use following simple code for reference.
$navitems = array('filename1.php' => 'Page Name 1', 'filename2.php' => 'Page Name 2');

echo "<ul>\n";

foreach ($navitems AS $k => $v) { 
 echo '<li><a href="' . $k . '" title="' . $v . '">' . $v . "</a></li>\n";
}

echo "</ul>\n";