I thank you very much for your answer.
I try with this code but it's don't work:
<?php if(!$product_info['call_to_order']){ ?>($display_price || $product['price'] == 0)
I try with this code but it's don't work:
<?php if(!$product_info['call_to_order']){ ?>($display_price || $product['price'] == 0)