Creating wordpress shortcodes

showads_functions.php

<?php
/**
 * Add shortcode for wordpress.
 * Usage: 
 *  - Add the below function in your functions.php file.
 *  - Replace [YOUR ADSENSE AD CODE] with javascript ad code obtained from adsense.
**/

add_shortcode('showads468x60', 'ad_display'); 
	function ad_display() {  
	return '<div>[YOUR ADSENSE AD CODE]</div>';  
}