PHP EventManager::trigger方法代码示例

 public function testListener()
 {
     $subject1 = $this->getMockBuilder('Jivoo\\Core\\EventSubject')->getMock();
     $subject1->method('getEvents')->willReturn(array('someEvent'));
     $subject2 = $this->getMockBuilder('Jivoo\\Core\\EventSubject')->getMock();
     $subject2->method('getEvents')->willReturn(array('someEvent'));
     $em1 = new EventManager($subject1);
     $em2 = new EventManager($subject2, $em1);
     $l = $this->getMockBuilder('Jivoo\\Core\\EventListener')->setMethods(array('getEventHandlers', 'someEvent'))->getMock();
     $l->method('getEventHandlers')->wilLReturn(array(get_class($subject2) . '.someEvent'));
     $l->expects($this->once())->method('someEvent')->willReturn(false);
     $em1->attachListener($l);
     $this->assertFalse($em2->trigger('someEvent'));
     $em1->detachListener($l);
     $this->assertTrue($em2->trigger('someEvent'));
 }

 /**
  * Execute all functions attached to an event.
  *
  * @param string $event
  *            Event name.
  * @param Event $event
  *            Event object.
  * @return bool False if event was stopped, true otherwise.
  */
 public function trigger($name, Event $event = null)
 {
     if (!isset($event)) {
         $event = new Event($this->subject);
     }
     if (isset($this->parent)) {
         if (!$this->parent->trigger($this->subjectClass . '.' . $name, $event)) {
             return false;
         }
     }
     if (isset($this->events[$name])) {
         $event->name = $name;
         foreach ($this->events[$name] as $function) {
             $continue = call_user_func($function, $event);
             if ($event->stopped or $continue === false) {
                 return false;
             }
         }
     } elseif (strpos($name, '.') === false) {
         throw new InvalidEventException('Event subject "' . $this->subjectClass . '" does not have event "' . $name . '"');
     }
     return true;
 }

    public function attach($name, $callback, $priority = 0)
    {
        $this->events->insert(array($name, $callback), $priority);
    }
    public function trigger($name, $params = array(), $callback = null)
    {
        foreach ($this->events as $event) {
            if ($event[0] = $name) {
                $e = new Event($name, $params);
                if ($r = $event[1]($e)) {
                    if (is_callable($callback)) {
                        $callback($r);
                    }
                }
            }
        }
    }
}
$events = new EventManager();
$events->attach('do', function ($e) {
    echo "Registered first\n";
    return "Hello SALAM";
}, 102);
$events->attach('do', function ($e) {
    echo "Registered second\n";
    return time();
}, 101);
$return = $events->trigger('do', array('a', 'b', 'c'), function ($r) {
    echo "<h1>{$r}</h1>\n";
});
echo "<h1>{$return}</h1>";

$events = $eventManager->getEventsByGroup('system');
echo "Events: \n";
print_r($events);
echo "\nRegistering an 'echo'/'system' event...\n";
$eventManager->register("echo", "system", "myEvent");
echo "\nRegistering an 'echo'/'system' event...\n";
$eventManager->register("echo", "system", "myEvent2");
echo "\nRegistering a 'script'/'project' event...\n";
$eventManager->register("script", "project", "Test::event");
echo "\nGetting events for 'system' group...\n";
$events = $eventManager->getEventsByGroup('system');
echo "Events: \n";
print_r($events);
echo "\nTriggering said event with 'apple' and 'water' passed...\n";
echo "Also triggering event 2...\n";
$eventManager->trigger("echo", "system", array('fruit' => 'apple', 'beverage' => 'water'));
echo "\nRemoving said event...\n";
$eventManager->remove("echo", "system", "myEvent");
echo "\nGetting events for 'system' group...\n";
$events = $eventManager->getEventsByGroup('system');
echo "Events: \n";
print_r($events);
echo "\nRemoving all echo event...\n";
$eventManager->remove("echo", "system");
echo "\nGetting events for 'system' group...\n";
$events = $eventManager->getEventsByGroup('system');
echo "Events: \n";
print_r($events);
echo "\nTriggering 'script' event with 'hck' passed...\n";
$eventManager->trigger("script", "project", array('project' => 'hck'));
function myEvent($params)

class EventManager
{
    private $events = array();
    public function attach($name, $callback)
    {
        $this->events[$name][] = $callback;
    }
    public function trigger($name, $params = array())
    {
        foreach ($this->events[$name] as $event => $callback) {
            $e = new Event($name, $params);
            $callback($e);
        }
    }
}
$events = new EventManager();
$events->attach('do', function ($e) {
    echo $e->getName() . "\n";
    print_r($e->getParams());
});
$hello = ['a' => 'qwerty', 'b' => time()];
$events->attach('do', function ($e) use($hello) {
    echo "<br/> Second Chance";
    echo $e->getName() . "\n";
    print_r($e->getParams());
    print_r($hello);
    return array(time());
});
echo "<hr/>";
echo $events->trigger('do', array('a', 'b', 'c'));

 /**
  * Trigger an event on this object.
  *
  * @param string $name
  *            Name of event.
  * @param Event $event
  *            Event object.
  * @return bool False if event was stopped, true otherwise.
  */
 public function triggerEvent($name, Event $event = null)
 {
     return $this->e->trigger($name, $event);
 }