[WooCommerce 3.0+] Hide billing checkout fields for virtual products

wc-no-billing-virtual-products.php

add_filter( 'woocommerce_checkout_fields' , 'woo_remove_billing_checkout_fields' );

function woo_remove_billing_checkout_fields( $fields ) { 

if( wc_cart_has_virtual_products() == true ) {

  unset( $fields['billing']['billing_first_name'] );
  unset( $fields['billing']['billing_last_name'] );
  unset( $fields['billing']['billing_email'] );
  unset( $fields['billing']['billing_company']);
  unset( $fields['billing']['billing_address_1']);
  unset( $fields['billing']['billing_address_2']);
  unset( $fields['billing']['billing_city']);
  unset( $fields['billing']['billing_postcode']);
  unset( $fields['billing']['billing_country']);
  unset( $fields['billing']['billing_state']);
  unset( $fields['billing']['billing_phone']);
  unset( $fields['order']['order_comments']);
  unset( $fields['billing']['billing_address_2']);
  unset( $fields['billing']['billing_postcode']);
  unset( $fields['billing']['billing_company']);
  unset( $fields['billing']['billing_city']);
  }

return $fields; 

}

function wc_cart_has_virtual_products() { 

global $woocommerce;
  
  // By default, no virtual product
  $has_virtual_products = false;
  
  // Default virtual products number
  $virtual_products = 0;
  
  // Get all products in cart
  $products = $woocommerce->cart->get_cart();
  
  // Loop through cart products
  foreach( $products as $product ) {
    
    // Get product ID and '_virtual' post meta
    if ($product['variation_id'] ) {
		  $product_id = $product['variation_id'];
	  } else {
		  $product_id = $product['product_id'];
}
    $is_virtual = get_post_meta( $product_id, '_virtual', true ); 
    
    // Update $has_virtual_product if product is virtual
    if( $is_virtual == 'yes' )
      $virtual_products += 1;
  }
  
  if( count($products) == $virtual_products )
    $has_virtual_products = true;
  
  return $has_virtual_products;
}

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