Webpatser\Countries\Countries::getList PHP Method

    public function getList($sort = null)
    {
        //Get the countries list
        $countries = $this->getCountries();
        //Sorting
        $validSorts = array('capital', 'citizenship', 'country-code', 'currency', 'currency_code', 'currency_sub_unit', 'full_name', 'iso_3166_2', 'iso_3166_3', 'name', 'region-code', 'sub-region-code', 'eea', 'calling_code', 'currency_symbol', 'flag');
        if (!is_null($sort) && in_array($sort, $validSorts)) {
            uasort($countries, function ($a, $b) use($sort) {
                if (!isset($a[$sort]) && !isset($b[$sort])) {
                    return 0;
                } elseif (!isset($a[$sort])) {
                    return -1;
                } elseif (!isset($b[$sort])) {
                    return 1;
                } else {
                    return strcasecmp($a[$sort], $b[$sort]);
                }
            });
        }
        //Return the countries
        return $countries;
    }

 /**
  * Returns a list of countries
  *
  * @param string  sort
  * @return array 
  * @static 
  */
 public static function getList($sort = null)
 {
     return \Webpatser\Countries\Countries::getList($sort);
 }