lithium\util\Collection::keys PHP Method

    public function keys()
    {
        return array_keys($this->_data);
    }

 /**
  * Read the configuration or access the connections you have set up.
  *
  * Usage:
  * {{{
  * // Gets the names of all available configurations
  * $configurations = Connections::get();
  *
  * // Gets the configuration array for the connection named 'db'
  * $config = Connections::get('db', array('config' => true));
  *
  * // Gets the instance of the connection object, configured with the settings defined for
  * // this object in Connections::add()
  * $dbConnection = Connection::get('db');
  *
  * // Gets the connection object, but only if it has already been built.
  * // Otherwise returns null.
  * $dbConnection = Connection::get('db', array('autoCreate' => false));
  * }}}
  *
  * @param string $name The name of the connection to get, as defined in the first parameter of
  *        `add()`, when the connection was initially created.
  * @param array $options Options to use when returning the connection:
  *        - `'autoCreate'`: If `false`, the connection object is only returned if it has
  *          already been instantiated by a previous call.
  *        - `'config'`: If `true`, returns an array representing the connection's internal
  *          configuration, instead of the connection itself.
  * @return mixed A configured instance of the connection, or an array of the configuration used.
  */
 public static function get($name = null, $options = array())
 {
     $defaults = array('config' => false, 'autoCreate' => true);
     $options += $defaults;
     if (empty($name)) {
         return static::$_configurations->keys();
     }
     if (!isset(static::$_configurations[$name])) {
         return null;
     }
     if ($options['config']) {
         return static::_config($name);
     }
     $settings = static::$_configurations[$name];
     if (!isset($settings[0]['adapter']) || !is_object($settings[0]['adapter'])) {
         if (!$options['autoCreate']) {
             return null;
         }
     }
     return static::adapter($name);
 }