Add a buy now button to clear cart, adds a product and then redirects to the checkout in WooCommerce

[sebastian-moran]

Add a buy now button to clear cart, adds a product and then redirects to the checkout in WooCommerce on child sites.

Snippet Type

Execute on Child Sites

Snippet

// Add new/extra button
function action_woocommerce_after_add_to_cart_button() {
    global $product;
    
    // Is a WC product
    if ( is_a( $product, 'WC_Product' ) ) {
        // Run only on simple products
        if ( $product->is_type( 'simple' ) ) {
            // Get product ID
            $product_id = $product->get_id();

            // Get permalink
            $permalink = $product->get_permalink();

            // Output url
            echo '<a href="' . $permalink . '?product_id=' . $product_id . '&redirect_checkout=true" class="mongo_single_add_to_cart_button button">'. __ ( 'Buy Now', 'woocommerce' ) . '</a>';
        }
    }
}
add_action( 'woocommerce_after_add_to_cart_button', 'action_woocommerce_after_add_to_cart_button', 10 );

// Redirect
function action_template_redirect() {
    // Determines whether the current request is for an administrative interface page
    if ( is_admin() ) return;

    // Returns true when viewing a single product
    if ( ! is_product() ) return;

    // Get params
    if ( isset( $_GET['product_id'] ) && isset( $_GET['redirect_checkout'] ) ) {
        // Get param 1
        $product_id = $_GET['product_id'];

        // Get param 2
        $boolean = $_GET['redirect_checkout'];

        // WC Cart
        if ( WC()->cart ) {
            // 1. Empty cart
            WC()->cart->empty_cart();

            // 2. Add to cart
            WC()->cart->add_to_cart( $product_id );

            // 3. Redirect
            // When true
            if ( $boolean ) {
                // Gets the url to the checkout page
                $checkout_url = wc_get_checkout_url();

                // Performs a safe (local) redirect
                wp_safe_redirect( $checkout_url );
                exit;
            }
        }
    }
}
add_action( 'template_redirect', 'action_template_redirect' );