Add Custom Fee to Woocommerce Cart for Physical Products

gistfile1.txt

/* Add Custom Fee to Woocommerce Cart for Physical Products.
=========================================================================== */
function itl_woocommerce_custom_fee() {
    global $woocommerce;

    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
        return;
    }

    $is_physical = false;
    $products 	 = $woocommerce->cart->get_cart();

    foreach( $products as $product ) {
	  
		if ( $product['variation_id'] ) {
			$product_id = $product['variation_id'];
		} else {
			$product_id = $product['product_id'];
		}

		$is_virtual 	 = get_post_meta( $product_id, '_virtual', true );
		$is_downloadable = get_post_meta( $product_id, '_downloadable', true );
	  
		if ( $is_virtual != 'yes' && $is_downloadable != 'yes' ) {
			$is_physical = true;

			break;
		}
	}

    if ( $is_physical ) {
	    $cost = 100; // fee
	    $woocommerce->cart->add_fee( 'fee', $cost, true, '' );
	}
}
add_action( 'woocommerce_cart_calculate_fees', 'itl_woocommerce_custom_fee' );