Sorry for the delay, I found where the “Facebook for woocommerce” plugin generates the product feed (\wp-content\plugins\facebook-for-woocommerce\includes\fbproductfeed.php) :
public function write_product_feed_file( $wp_ids )
try {
// Step 1: Prepare the temporary empty feed file with header row.
$temp_feed_file = $this->prepare_temporary_feed_file();
// Step 2: Write products feed into the temporary feed file.
$this->write_products_feed_to_temp_file( $wp_ids, $temp_feed_file );
// Step 3: Rename temporary feed file to final feed file.
$this->rename_temporary_feed_file_to_final_feed_file();
$written = true;
} catch { .... }
But where you get the fields is in the function
prepare_product_for_feed( $woo_product, &$attribute_variants ) {
...
...
// where do I find this code
static::format_price_for_feed(
static::get_value_from_product_data( $product_data, 'price', 0 ),
static::get_value_from_product_data( $product_data, 'currency' )
) . ',' .
...
...
}
I hope that with this information you can help me. All the best
