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WooCommerce Checkout Message Based For A Variable Product And A Specific Variable?

I have added a custom message that now appears below woocommerce_after_order_notes, But I just want it to be displayed for one of the variables of a product. The following code shows it only for the main product Please tell me how to change it for a variable.

add_action( 'woocommerce_after_order_notes', 'allclean_add_checkout_content', 12 );
function allclean_add_checkout_content() {
    // set your products IDs here:
    $product_ids = array( 91);
    $bool = false;
    foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
        $item = $cart_item['data'];
        if ( in_array( $item->id, $product_ids ) )
            $bool = true;
    }
    // If the special cat is detected in one items of the cart
    // It displays the message
    if ($bool)
        echo '<div class="checkoutdisc">This is Your custom message displayed.</div>';
}

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Answer

You can check if there is any variation_id in cart like this $cart_item['variation_id']. try the below code.

add_action( 'woocommerce_after_order_notes', 'allclean_add_checkout_content', 12 );
function allclean_add_checkout_content() {

    // set your products IDs here:
    $product_ids = array( 82, 94 ); // add your both product and variation id.

    $parent_ids_in_cart = false;
    
    foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
        $item = $cart_item['data'];
        if ( in_array( $item->id, $product_ids ) ){
            $parent_ids_in_cart = true;
        }
    }

    $variation_ids_in_cart = false;

    // Loop through cart items
    foreach( WC()->cart->get_cart() as $cart_item ) {
        // Collecting product variation IDs if they are in cart for this variable product
        if ( $cart_item['variation_id'] > 0 && in_array( $cart_item['variation_id'], $product_ids ) ){
            $variation_ids_in_cart = true;
        }
    }

    // It displays the message
    if ( $parent_ids_in_cart || $variation_ids_in_cart ){
        echo '<div class="checkoutdisc">This is Your custom message displayed.</div>';
    }

}
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source: stackoverflow.com
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