CakePHP extend currency formatting

I need to extend the number helper to include other currencies. Using the "addFormat" function in the number helper, I have created a new "Currenci开发者_开发知识库esHelper" to add these currencies.

<?php

class CurrenciesHelper extends NumberHelper {

I know I need to make it possible for this helper to run this function immediately. What am I missing to contain this so it runs and adds this format?

     $this->Number->addFormat('CAD', array(
        'before'=>'$',
        'after' => false,
        'zero' => 0,
        'places' => 2,
        'thousands' => '.',
        'decimals' => ',',
        'negative' => '()',

}

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Starting CakePHP 2.1, you don't need to extend the helper to get this done. NumberHelper has been re-factored into CakeNumber class. If you go through the code, you can see that the formats are now stored as a static array.

That helps us configure currency formats within app/Config/core.php, like the following:

App::uses( 'CakeNumber', 'Utility' );

CakeNumber::addFormat( 
    'CAD', 
    array(
       'before' => '$ ', 'after' => false, 
       'zero' => 0, 'places' => 2, 'thousands' => '.',
       'decimals' => ',', 'negative' => '()', 'escape' => true
    ) 
);

// ... and any more definitions to follow.

Once your currency definitions are part of the core configuration, you can use them in any view using NumberHelper like $this->Number->currency( $c, 'CAD' ).

---

PREVIOUS ANSWER CHANGED: Due to position of functions, after the fact. Had to change to:

function __beforeRender(){
}

Was causing overwriting of other custom currencies.

By encapsulating it in a construct function, it run on helper construction. I was sure to include the parent constructor just in case.

function __construct() {
    parent::__construct();
    // code goes here
}