Shortcode To Add Multiple Products To Cart

amptc.wc

//Start Shop The Look Shortcode by u/acephaliax
function shop_the_look_button_shortcode($atts) {
    // Shortcode attributes
    $atts = shortcode_atts(
        array(
            'ids' => '', // Product IDs comma-separated
        ),
        $atts,
        'shop_the_look'
    );

    // Convert comma-separated product IDs to an array
    $product_ids = explode(',', $atts['ids']);

    // Build dynamic add to cart URL
    $add_to_cart_url = home_url('/?add-more-to-cart='); // Updated URL format

    foreach ($product_ids as $product_id) {
        $add_to_cart_url .= absint($product_id) . ','; // Append each product ID
    }

    // Remove the trailing comma
    $add_to_cart_url = rtrim($add_to_cart_url, ',');

    // Button HTML with the generated URL
    $button_html = '<a href="' . esc_url($add_to_cart_url) . '" class="shop-the-look-button shopthelook">Shop the Look</a>';

    return $button_html;
}

// Register the shortcode
add_shortcode('shop_the_look', 'shop_the_look_button_shortcode');

//Start Add Multiple Products To Cart URL by https://stackoverflow.com/users/3902411/nate
class add_more_to_cart {

    private $prevent_redirect = false; //used to prevent WC from redirecting if we have more to process

    function __construct() {
        if ( ! isset( $_REQUEST[ 'add-more-to-cart' ] ) ) return; //don't load if we don't have to
        $this->prevent_redirect = 'no'; //prevent WC from redirecting so we can process additional items
        add_action( 'wp_loaded', [ $this, 'add_more_to_cart' ], 21 ); //fire after WC does, so we just process extra ones
        add_action( 'pre_option_woocommerce_cart_redirect_after_add', [ $this, 'intercept_option' ], 9000 ); //intercept the WC option to force no redirect
    }

    function intercept_option() {
        return $this->prevent_redirect;
    }

    function add_more_to_cart() {
        $product_ids = explode( ',', $_REQUEST['add-more-to-cart'] );
        $count       = count( $product_ids );
        $number      = 0;

        foreach ( $product_ids as $product_id ) {
            if ( ++$number === $count ) $this->prevent_redirect = false; //this is the last one, so let WC redirect if it wants to.
            $_REQUEST['add-to-cart'] = $product_id; //set the next product id
            WC_Form_Handler::add_to_cart_action(); //let WC run its own code
        }
    }
}
new add_more_to_cart;

shopthelook.css

/* Add/modify button style as needed. Add css to Theme Customiser > Additional CSS */ 
.shopthelook {
    background-color: #000;
    padding:10px;
    color: #ffffff;
}

usage.md

• Add php snippet to child theme functions php or via code snippets plugin.
• Add CSS to Theme Customiser > Additional CSS
• Use shortcode : [shop_the_look ids="828,827"] to add a button that adds the products specified. Change product ID's to match your products.
• To use in template file: echo do_shortcode('[shop_the_look ids="828,827"]');

Utilised snippet for adding multiple products via add to cart url by Nate. https://stackoverflow.com/a/54622735/11055908