interface FlashBagInterface

FlashBagTest.php in drupal/core/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php

Session.php in drupal/core/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Session.php

interface FlashBagInterface extends SessionBagInterface {

  /**
   * Adds a flash message for type.
   *
   * @param string $type
   * @param string $message
   */
  public function add($type, $message);

  /**
   * Registers a message for a given type.
   *
   * @param string       $type
   * @param string|array $message
   */
  public function set($type, $message);

  /**
   * Gets flash messages for a given type.
   *
   * @param string $type    Message category type.
   * @param array  $default Default value if $type does not exist.
   *
   * @return array
   */
  public function peek($type, array $default = array());

  /**
   * Gets all flash messages.
   *
   * @return array
   */
  public function peekAll();

  /**
   * Gets and clears flash from the stack.
   *
   * @param string $type
   * @param array  $default Default value if $type does not exist.
   *
   * @return array
   */
  public function get($type, array $default = array());

  /**
   * Gets and clears flashes from the stack.
   *
   * @return array
   */
  public function all();

  /**
   * Sets all flash messages.
   */
  public function setAll(array $messages);

  /**
   * Has flash messages for a given type?
   *
   * @param string $type
   *
   * @return boolean
   */
  public function has($type);

  /**
   * Returns a list of all defined types.
   *
   * @return array
   */
  public function keys();

}