/**
 * Add Google Analytics to Footer
 * http://digwp.com/2010/03/wordpress-functions-php-template-custom-functions/
 *
 **/
function myfunction_add_google_analytics() {
	echo '<script src="http://www.google-analytics.com/ga.js" type="text/javascript"></script>';
	echo '<script type="text/javascript">';
	echo 'var pageTracker = _gat._getTracker("UA-XXXXX-X");';
	echo 'pageTracker._trackPageview();';
	echo '</script>';
}
add_action('wp_footer', 'myfunction_add_google_analytics');

http://digwp.com/2010/03/wordpress-functions-php-template-custom-functions/

Wordpress: Add Google Analytics to Footer

wordpress

PHP