Woocommerce

If you need to then manually replace the WooCommerce default page navigation then add this code to your current themes functions.php file:

/**
* Replace WooCommerce Default Pagination with WP-PageNavi Pagination
*
* @author WPSnacks.com
* @link http://www.wpsnacks.com
*/
remove_action('woocommerce_pagination', 'woocommerce_pagination', 10);
function woocommerce_pagination() {
wp_pagenavi();
}
add_action( 'woocommerce_pagination', 'woocommerce_pagination', 10);

WP-PageNavi

To display the cart contents and total in your template use something like:

<a class="cart-contents" href="<?php echo WC()->cart->get_cart_url(); ?>" title="<?php _e( 'View your shopping cart' ); ?>"><?php echo sprintf (_n( '%d item', '%d items', WC()->cart->cart_contents_count ), WC()->cart->cart_contents_count ); ?> - <?php echo WC()->cart->get_cart_total(); ?></a>

To ajaxify your cart viewer so it updates when an item is added (via ajax) use:

// Ensure cart contents update when products are added to the cart via AJAX (place the following in functions.php)
add_filter( 'woocommerce_add_to_cart_fragments', 'woocommerce_header_add_to_cart_fragment' );
function woocommerce_header_add_to_cart_fragment( $fragments ) {
  ob_start();
  ?>
  <a class="cart-contents" href="<?php echo WC()->cart->get_cart_url(); ?>" title="<?php _e( 'View your shopping cart' ); ?>"><?php echo sprintf (_n( '%d item', '%d items', WC()->cart->cart_contents_count ), WC()->cart->cart_contents_count ); ?> - <?php echo WC()->cart->get_cart_total(); ?></a> 
  <?php  
  $fragments['a.cart-contents'] = ob_get_clean();
  return $fragments;
}

add_filter( 'add_to_cart_text', 'woo_custom_cart_button_text' );                        // < 2.1
add_filter( 'woocommerce_product_add_to_cart_text', 'woo_custom_cart_button_text' );    // 2.1 +
function woo_custom_cart_button_text() {
        return __( 'My Button Text', 'woocommerce' );
}

Add the following to your functions.php file replacing 'my button text' with whatever you want it to say:

add_filter( 'add_to_cart_text', 'woo_custom_cart_button_text' );                                // < 2.1
add_filter( 'woocommerce_product_single_add_to_cart_text', 'woo_custom_cart_button_text' );    // 2.1 +
function woo_custom_cart_button_text() {
        return __( 'Buy Now', 'woocommerce' );
}

Automatically mark orders for virtual products as Completed after a successful payment by adding this snippet into your functions.php:

/**
* Auto Complete all WooCommerce orders.
* Add to theme functions.php file
*/

add_action( 'woocommerce_thankyou', 'custom_woocommerce_auto_complete_order' );
function custom_woocommerce_auto_complete_order( $order_id ) {
    global $woocommerce;
    if ( !$order_id )
        return;
    $order = new WC_Order( $order_id );
    $order->update_status( 'completed' );
}

function ds_change_register_link($link, $action=null, $query=null)
{
    $parsed_link = parse_url($link);
    if ($parsed_link['query'] == 'action=register') {
        $link = site_url().'/registration/';
    }
    return $link;
}
add_filter('tml_page_link', 'ds_change_register_link');

<?php 
$searchkeys = 'searchkeyword';
global $wpdb;
$querysearch=" SELECT * FROM $wpdb->posts, $wpdb->term_relationships, $wpdb->term_taxonomy, $wpdb->terms WHERE ($wpdb->terms.name = '$searchkeys' OR $wpdb->posts.post_content LIKE '%$searchkeys%' OR $wpdb->posts.post_title LIKE '%$searchkeys%') AND $wpdb->posts.post_type = 'post' AND $wpdb->posts.ID = $wpdb->term_relationships.object_id AND  $wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id AND $wpdb->term_taxonomy.term_id = $wpdb->terms.term_id ORDER BY $wpdb->posts.post_date DESC";

$get_results = $wpdb->get_results($querysearch, OBJECT_K);
?>

function menu($atts, $content = null)
    {
        extract(shortcode_atts(array(
                'theme_location' => '',
                'menu' => '',
                'container' => 'div',
                'container_class' => '',
                'container_id' => '',
                'menu_class' => 'menu',
                'menu_id' => '',
                'echo' => true,
                'fallback_cb' => 'wp_page_menu',
                'before' => '',
                'after' => '',
                'link_before' => '',
                'link_after' => '',
                'depth' => 0,
                'walker' => ''
        ) , $atts));
        return wp_nav_menu(array(
                'theme_location' => $theme_location,
                'menu' => $menu,
                'container' => $container,
                'container_class' => $container_class,
                'container_id' => $container_id,
                'menu_class' => $menu_class,
                'menu_id' => $menu_id,
                'echo' => false,
                'fallback_cb' => $fallback_cb,
                'before' => $before,
                'after' => $after,
                'link_before' => $link_before,
                'link_after' => $link_after,
                'depth' => $depth,
                'walker' => $walker
        ));
    }
// Create the shortcode 
add_shortcode("menu", "menu");

[menu menu=Top Navigation menu_class=main_menu]  // Here "Top Navigation" is Menu Name

add_filter('body_class', 'remove_body_class', 20, 2);
function remove_body_class($wp_classes)
    {
        foreach($wp_classes as $key =--> $value)
            {
                if ($value == 'right-sidebar') unset($wp_classes[$key]);
            }
        return $wp_classes;
    }