Ghanaian cedi custom currency

<?php
/*
This function will add GH₵ to the list of available currencies for your events.
Edit accordingly for other currencies.

For information on how to paste/implement this snippet, see here - http://wp-events-plugin.com/tutorials/how-to-safely-add-php-code-to-wordpress/
*/
function my_em_add_currencies($currencies){
    $currencies->names['GHS'] = 'GH₵ - Ghanaian Cedi'; //textual representation of the currency
    $currencies->symbols['GHS'] = 'GH&#8373;'; //If the symbol requires an entity, like for € it's &euro;
    $currencies->true_symbols['GHS'] = 'GH₵'; //The actual symbol used, e.g. for Euros it's €
    return $currencies;
}
add_filter('em_get_currencies','my_em_add_currencies');