Problem triggering an action when product is published

Hello,
I’m trying to trigger an action when a product is published, but it doesn’t work, here is my code:

add_action( 'transition_post_status', 'my_call_back_function', 10, 3 );
 
function my_call_back_function( $new_status, $old_status, $post ) {
   if (
      'product' !== $post->post_type ||
      'publish' !== $new_status ||
      'publish' === $old_status
   ) {
      return;
   }
   file_put_contents( 'file.txt', 'Product published', FILE_APPEND ); 
}

here I’m trying to create a file and put some text in it. but as I said, the file isn’t created. I’m using wordpress 5.8.1 and Woocommerce 5.8.0. What is the problem and how to solve it? Your help would be greatly appreciated.

• This topic was modified 3 years, 1 month ago by mashour06.