Array of country list in PHP with Zend Framework

public static function countryList($local) 
{ 
$locale = new Zend_Locale('en_US'); 
$countries = ($locale->getTranslationList('Territory', $local, 2)); 
asort($countries, SORT_LOCALE_STRING); 

$countries = array_combine($countries, $countries); 

return $countries; 
}