if ( ! function_exists( 'virtual_order_payment_complete_order_status' ) ) {		
	function virtual_order_payment_complete_order_status( $order_status, $order_id ) {
		$order = new WC_Order( $order_id );
 
		if ( 'processing' == $order_status &&
        ( 'on-hold' == $order->status || 'pending' == $order->status || 'failed' == $order->status ) ) {
 
			$virtual_order = null;
 
			if ( count( $order->get_items() ) > 0 ) {
 
				foreach( $order->get_items() as $item ) {
 
					if ( 'line_item' == $item['type'] ) {
 
						$_product = $order->get_product_from_item( $item );
 
						if ( ! $_product->is_virtual() ) {
						// once we've found one non-virtual product we know we're done, break out of the loop
							$virtual_order = false;
							break;
						} else {
							$virtual_order = true;
						}
					}
				}
			}
 
			// virtual order, mark as completed
			if ( $virtual_order ) {
				return 'completed';
			}
		}
 
		// non-virtual order, return original status
		return $order_status;
	}
}
add_filter( 'woocommerce_payment_complete_order_status', 'virtual_order_payment_complete_order_status', 10, 2 );