These are some of the common codes that I use in any WordPress WooCommerce-based project. Hope you guys find it useful.

Add WooCommerce template customization support in the theme

add_theme_support(
    'woocommerce',
    array(
        // 'thumbnail_image_width' => 200,
        // 'gallery_thumbnail_image_width' => 100,
        // 'single_image_width' => 470,
    )
);

Get The WooCommerce Page ID You Need

get_option( 'woocommerce_shop_page_id' ); 
get_option( 'woocommerce_cart_page_id' ); 
get_option( 'woocommerce_checkout_page_id' );
get_option( 'woocommerce_pay_page_id' ); 
get_option( 'woocommerce_thanks_page_id' ); 
get_option( 'woocommerce_myaccount_page_id' ); 
get_option( 'woocommerce_edit_address_page_id' ); 
get_option( 'woocommerce_view_order_page_id' ); 
get_option( 'woocommerce_terms_page_id' );

Enable product gallery, zoom, lightbox

add_theme_support( 'wc-product-gallery-slider' );
add_theme_support( 'wc-product-gallery-zoom' );
add_theme_support( 'wc-product-gallery-lightbox' );

Add specific CSS class to the body tag for NON-WooCommerce Pages

add_filter( 'body_class', 'wpmix_body_class' );
function wpmix_body_class( $classes ) {
    if ( ! is_woocommerce() ) {
        $classes[] = 'woocommerce notWoo';
    }
    return $classes;
}

Remove WooCommerce Sidebar

remove_action( 'woocommerce_sidebar', 'woocommerce_get_sidebar', 10 );

Remove Related Products Section

remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 );

Remove Category names from Single Product Summary

remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_meta', 40 );

Remove Upsells

remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_upsell_display', 15 );

Add Title as Alt tags on all product images

add_filter( 'wp_get_attachment_image_attributes', 'wpmix_change_attachement_image_attributes', 20, 2 );

function wpmix_change_attachement_image_attributes( $attr, $attachment ) {
    // Get post parent.
    $parent = get_post_field( 'post_parent', $attachment );

    // Get post type to check if it's product.
    $type = get_post_field( 'post_type', $parent );
    if ( $type != 'product' ) {
        return $attr;
    }

    // Get title
    $title = get_post_field( 'post_title', $parent );

    $attr['alt']   = $title;
    $attr['title'] = $title;

    return $attr;
}

Update cart counter when product added to cart

add_filter( 'woocommerce_add_to_cart_fragments', 'wpmix_cart_count_fragments', 10, 1 );

function wpmix_cart_count_fragments( $fragments ) {
    $fragments['a.cart-link span.count'] = '<span class="count">' . WC()->cart->get_cart_contents_count() . '</span>';
    return $fragments;
}

Custom checkout button

add_action( 'woocommerce_widget_shopping_cart_buttons', 'wpmix_proceed_to_checkout', 22 );

function wpmix_proceed_to_checkout() {
    echo '<a href="' . wc_get_checkout_url() . '" class="btn btn-black btn-block text-uppercase">Proceed to Checkout</a>';
}

Remove the company name field from the checkout page

add_filter( 'woocommerce_checkout_fields', 'wpmix_override_checkout_fields' );

function wpmix_override_checkout_fields( $fields ) {
    unset( $fields['shipping']['billing_company'] );
    return $fields;
}

Remove different links from My Account

add_filter( 'woocommerce_account_menu_items', 'wpmix_remove_my_account_links' );

function wpmix_remove_my_account_links( $menu_links ) {
    unset( $menu_links['subscriptions'] ); // Subscriptions
    unset( $menu_links['payment-methods'] ); // Payment methods
    unset( $menu_links['downloads'] ); // Payment methods
    return $menu_links;
}

Move the price below the Short description on the Product Page

remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_price', 4 );
remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_price', 10 );
add_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_price', 29 );

Remove tags from the Product Page

add_action( 'after_setup_theme', 'wpmix_after_setup_theme' );

function wpmix_after_setup_theme() {
    remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_meta', 40 );
}

Remove the breadcrumb

add_action( 'init', 'wpmix_remove_wc_breadcrumbs' );

function wpmix_remove_wc_breadcrumbs() {
    remove_action( 'woocommerce_before_main_content', 'woocommerce_breadcrumb', 20, 0 );
}

Remove the product details tab

add_filter( 'woocommerce_product_tabs', 'wpmix_remove_description_tab', 11 );

function wpmix_remove_description_tab( $tabs ) {
    unset( $tabs['additional_information'] );
    return $tabs;
}

Rename product tab titles

add_filter( 'woocommerce_product_tabs', 'wpmix_rename_additional_info_tab' );

function wpmix_rename_additional_info_tab( $tabs ) {
    $tabs['description']['title']       = 'Description';
    $tabs['short_description']['title'] = 'More Information';
    return $tabs;
}

Modify product sorting options in the dropdown

add_filter( 'woocommerce_catalog_orderby', 'wpmix_customize_product_sorting' );

function wpmix_customize_product_sorting( $sorting_options ) {
    $sorting_options = array(
        'menu_order' => __( 'Sort', 'woocommerce' ),
        'popularity' => __( 'Popularity', 'woocommerce' ),
        'rating'     => __( 'Average rating', 'woocommerce' ),
        'date'       => __( 'Newness', 'woocommerce' ),
        'price'      => __( 'Price: low to high', 'woocommerce' ),
        'price-desc' => __( 'Price: high to low', 'woocommerce' ),
    );

    return $sorting_options;
}

Order products by Stock status (show out of stock last)

add_filter( 'woocommerce_get_catalog_ordering_args', 'wpmix_sort_by_stock_amount', 9999 );

function wpmix_sort_by_stock_amount( $args ) {
    $args['orderby']  = array(
        'meta_value' => 'ASC',
        'menu_order' => 'ASC',
    );
    $args['meta_key'] = '_stock_status';
    return $args;
}

Limit orders by a specific amount

add_action( 'woocommerce_check_cart_items', 'wpmix_set_min_total' );
function wpmix_set_min_total() {
    // Only run in the Cart or Checkout pages
    if ( is_cart() || is_checkout() ) {
        global $woocommerce;
        // Set minimum cart total
        $maximum_cart_total = 150;
        // A Maximum of 150 amount is required before checking out.

        $total = WC()->cart->subtotal;
        // Compare values and add an error is Cart's total
        if ( $total > $maximum_cart_total ) {
            // Display our error message
            wc_add_notice(
                sprintf(
                    'Total cost of products in cart must be <strong>&pound;150.00</strong> or less.'
                    . '<br /><br />Current cart\'s total: <strong>&pound;%s</strong>',
                    $total
                ),
                'error'
            );
        }
    }
}

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