Autoloader for wordpress theme

autoloader.php

<?php
/**
 * WordPress Theme Autoload
 * Place on Root Theme
 * Create a folder as classes
 * This peace of code adds a autoloader into any wordpress theme you have
 * to use this only follow the simple steps bellow
 * create all your class files inside the folder named class
 * and then just include this autoloader.php file in your theme functions.php
 * require_once TEMPLATEPATH . '/autoloader.php';
 * https://github.com/knoonrx
 * https://gist.github.com/knoonrx
 **/
add_action ( 'init' , 'class_loader' );
function class_loader () {
    spl_autoload_register ( 'template_autoload' );
}
function template_autoload ( $class ) {
    try
    {   $extension = '.php';
        $separator = '\\';
        $class = str_replace($separator, DIRECTORY_SEPARATOR ,$class);
        if ( file_exists ( TEMPLATEPATH . DIRECTORY_SEPARATOR . $class . $extension ) )
            require_once TEMPLATEPATH . DIRECTORY_SEPARATOR . $class . $extension;
    } catch(Error $ex) {
        return 'Error: ' . $ex->getMessage();
    }
}