Make Shipping Method fields Mandatory on Woocommerce checkout page

php wordpress woocommerce checkout shipping

PHP Snippet 1:

// Validate shipping method fields and returning an error if none is choosed
add_action( 'woocommerce_checkout_process', 'shipping_method_validation', 20 );
function shipping_method_validation() {
    if ( ! isset( $_POST['shipping_method[0]'] ) ){
        wc_add_notice( __( "You need to choose your a shipping option.", "woocommerce" ), 'error' );
    }
}