How do I use ZF2 I18n currencyformatter to format bitcoin

Question

Bitcoin allows 8 decimal places (123.45678912).

How can I use ZF2 I18n currency formatter to format a bitcoin amount with the full 8 decimal places instead of just cutting it short to 2 decimal places?

Answer 1

From ZF2's documentation at http://framework.zend.com/manual/2.3/en/modules/zend.i18n.view.helpers.html

I found the following link:

http://www.icu-project.org/apiref/icu4c/classDecimalFormat.html#details

If you scroll down to the decimal format and significant digits sections, you'll see the answer. I ended up doing this for my code to represent BTC:

$cur = getCurrency();

$this->plugin("currencyformat")->setCurrencyCode($cur);

if($cur == "BTC"):
    $this->plugin("currencyformat")->setCurrencyPattern('@############### ¤');
endif;

The '@' means display at least one signification digit. The 15 '#'s plus the '@' means the maximum amount of significant digits to show is 16. The '¤' will display the currency at the end of the number.