osCommerce Community Support Forums: nikita - Viewing Profile

I need a very simple cookie add to my osc site:
- when website user select one language, system sets a necessary cookie and remeber choosen language for that user;
- when this user comes back to the website (eg. after a week) our system automaticaly reads cookies and show website in a saved language.

How to get this simply?

I thought about price in the shop.
Decided that there is an opportunity to add to "currencies.php" class another value to calculate the price for each customer.

1. I have made a new collumn in 'customers' table named 'customers_percentage';

2. In 'application_top.php' I have added the request which will give me the value:

$percent_query = tep_db_query("select customers_percentage from " . TABLE_CUSTOMERS . " where customers_id = '" . (int)$customer_id . "'");$percent = tep_db_fetch_array($percent_query);

3. Opened class 'includes/classes/currencies.php' and decided to correct the line:

$format_string = $this->currencies[$currency_type]['symbol_left'] . number_format(tep_round($number * $rate, $this->currencies[$currency_type]['decimal_places']), $this->currencies[$currency_type]['decimal_places'], $this->currencies[$currency_type]['decimal_point'], $this->currencies[$currency_type]['thousands_point']) . $this->currencies[$currency_type]['symbol_right'];

4. By adding another calculation based on my new cell value in customers table (... * ($percent['customers_percentage']) ...), and the line become the following:

$format_string = $this->currencies[$currency_type]['symbol_left'] . number_format(tep_round($number * $rate * ($percent['customers_percentage']), $this->currencies[$currency_type]['decimal_places']), $this->currencies[$currency_type]['decimal_places'], $this->currencies[$currency_type]['decimal_point'], $this->currencies[$currency_type]['thousands_point']) . $this->currencies[$currency_type]['symbol_right'];

Finally, the prices in my shop become zeros! Mistake!
Than I decided to change my value to simple number. For example: +2, -4 (... number_format(tep_round($number * $rate * (-4) ...). The result was great - I mean all the calculation works for now, but only with number, but I need it to work wih my value!

And so, why I can't give the value when I put my request -> $percent['customers_percentage'] in a class?

I hope there are lot cool coders which could give me examples, corrections and comments on my post?