class checkPost{
  function __construct()
  {
    if ( !wp_next_scheduled(\'my_task_hook\') ) {
      wp_schedule_event( time(), \'hourly\', \'my_task_hook\' ); // hourly, daily and twicedaily
    }
    add_action(\'my_task_hook\', array(&$this,\'my_task_function\'));
  }
  function my_task_function() 
  {
    add_action(\'wp_head\', array(&$this,\'wp_head\'));
  }
  function wp_head()
  {
    echo \'<!--This is a test!-->\';
  }
}