woocommerce_product_file │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_product_file', 'wp_kama_woocommerce_product_file_filter', 10, 3 );

/**
 * Function for `woocommerce_product_file` filter-hook.
 * 
 * @param  $file        
 * @param  $that        
 * @param  $download_id 
 *
 * @return 
 */
function wp_kama_woocommerce_product_file_filter( $file, $that, $download_id ){

	// filter...
	return $file;
}

$file

-

$that

-

$download_id

-

Where the hook is called

return apply_filters( 'woocommerce_product_file', $file, $this, $download_id );

Where the hook is used in WooCommerce