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<?php

add_filter( 'woocommerce_add_to_cart_fragments', __NAMESPACE__ . '\\woocommerce_header_add_to_cart_fragment' );
function woocommerce_header_add_to_cart_fragment( $fragments ) {
    ob_start();
    ?>
    <a class="cart-contents" href="<?php echo wc_get_cart_url(); ?>" title="<?php _e( 'View your shopping cart' ); ?>"><?php echo sprintf (_n( '%d item', '%d items', WC()->cart->get_cart_contents_count() ), WC()->cart->get_cart_contents_count() ); ?> - <?php echo WC()->cart->get_cart_total(); ?></a> 
    <?php

    $fragments['a.cart-contents'] = ob_get_clean();

    return $fragments;
}