Flash Messages for PHP

flash_message_usage.php

<?php
  /**
   * Usage Examples
   */
  $flash_message = FlashMessage::getInstance();
  $flash_message->set('notice', 'This is a notice message');
  $flash_message->flash('This is a flash message');
?>

<?php if ($flash_message->has('notice')) : ?>
  <div class="flash_notice"><?php echo $flash_message->get('notice')?></div>
<?php endif ?>

flash_messages.php

<?php
/**
 * Simple interface for dealing with flash messages
 */
class FlashMessage
{
  private $messages = array();
  private static $instance = null;

  /**
   * Only allows one instance of the class
   * 
   * @return FlashMessage
   */
  public static function getInstance()
  {
    if(self::$instance === null)
    {
      self::$instance = new FlashMessage();
    }

    return self::$instance;
  }

  /**
   * Constructor
   */
  public function __construct()
  {
    $this->messages = $_SESSION['messages'];
  }

  /**
   * Allows simple message adding
   *
   * @param String $name
   * @param Array  $args
   */
  public function __call($name, $args)
  {
    $this->set($name, $args[0]);
  }

  /**
   * Set Message
   *
   * @param String $name
   * @param String $message
   */
  public function set($name, $message)
  {
    $this->messages[$name] = $message;
    $this->save();
  }

  /**
   * Return a Message
   *
   * @param  String $name
   * @return String
   */
  public function get($name)
  {
    return $this->has($name) ? $this->messages[$name] : null;
  }

  /**
   * Checks if the class has the variable set
   *
   * @param  String $name
   * @return Boolean
   */
  public function has($name)
  {
    return array_key_exists($name, $this->messages);
  }

  /**
   * Destroys messages in session
   */
  public function destroy()
  {
    unset($_SESSION['messages']);
  }

  /**
   * Saves messages into session
   */
  public function save()
  {
    $_SESSION['messages'] = $this->messages;
  }
}

?>

On line #64 you could use your has() method.

return $this->has($name) ? $this->messages[$name] : null;

Great idea. Thanks.