if (time() >= strtotime("1 Oct 2007") && time() < strtotime("30 Oct 2007")) return 74;
if (time() < strtotime("1 Nov 2008")) return 75;
if ($fromCountryId == "US") return 55;
if ($fromCountryId == "GB") return "55,56,57";
if ($fromCountryId == "NL") return array(58,59,73);
if ($fromCountryName == "New Zealand") return 21;

You have access to the following PHP variables:

• $fromCountryId - the upper-case 2-letter ISO country code (e.g. GB, US, FR, DE)
• $fromCountryName - the official ISO country name
• $geoip - if you have enabled GeoLiteCity or GeoIPCity, a record containing the following items:
• $geoip->country_name - full country name, as above
• $geoip->country_code - 2-letter ISO country code, as above
• $geoip->country_code3 - 3-letter ISO country code (e.g. GBR, USA, FRA, DEU)
• $geoip->region - 2-letter code. For US/Canada, ISO-3166-2 code for the state/province name, e.g. "GA" (Georgia, USA). Outside of the US and Canada, FIPS 10-4 code., e.g. "M9" (Staffordshire, UK)
• $geoip->city - full city name
• $geoip->postal_code - For US, Zipcodes, for Canada, postal codes. Available for about 56% of US GeoIP Records. More info.
• $geoip->latitude
• $geoip->longitude
• $geoip->dma_code - 3-digit DMA/Metro code (US only)
• $geoip->area_code - 3-digit telephone prefix (US Only)
• $Itemid - the Itemid of the main component on the page
• $option - the option of the main component on the page (e.g. com_content)
• $task - the task of the main component on the page (e.g. "view" or "category")
• $id - the id of the item in the main component on the page (e.g. "24:content-layouts")
• $database - in case you want to query the database for anything (for experts!)
• $language - a lower-case language code. By default this returns the default language of the web visitor’s browser, but can alternatively return the language code of the Joomla front-end, or intelligently find the best match between a user’s browser languages and a list of languages that you provide. Typical language strings returned include: en, en-gb, en-us, fr, de and many others.
• $language_code - the 2-letter language code without region (lower case) e.g. "en"
• $language_region - if it exists, the 2-letter region code (lower case). e.g. if $language == "en-us", $language_code == "en" and $language_region == "us". Having them in separate variables like this makes it easier to put into MetaMod rules.
• $my - information about the user, if they are logged in. e.g.
• $my->id
• $my->name
• $my->username
• $my->email
• $my->usertype e.g. "" or "Public Frontend"=not logged in (test for both), otherwise "Registered", "Author", "Editor", "Publisher", "Manager", "Administrator" or "Super Administrator"
• $my->gid (group id: 0=Public, 1=Registered, 2=Special)
• $user->registerDate e.g. "2007-05-17 01:25:52"
• $user->lastvisitDate e.g. "2007-11-02 18:51:29"