URLify::remove_words PHP Метод

    public static function remove_words($words)
    {
        $words = is_array($words) ? $words : array($words);
        self::$remove_list = array_merge(self::$remove_list, $words);
    }

 function test_remove_words()
 {
     $this->assertEquals('foo-bar', URLify::filter('foo bar'));
     URLify::remove_words(array('foo', 'bar'));
     $this->assertEquals('', URLify::filter('foo bar'));
 }