CakePHP passing values between controllers - cakephp

Question

I want to pass values from one controller to another.
For example I have a Conference controller and I want to create a new Event.
I want to pass the Conference id to the event to make sure those two objects are associated.
I would like to store in the ivar $conference using beforeFilter method.
Here is my beforeFilter function in the Events controller
public function beforeFilter() {
parent::beforeFilter();
echo '1 ' + $this->request->id;
echo '2 ' + $this->request['id'];
echo $this->request->params['id'];
if(isset( $this->request->params['id'])){
$conference_id = $this->request->params['id'];
}
else{
echo "Id Doesn't Exist";
}
}
Whenever I change url to something like:
http://localhost:8888/cake/events/id/3
or
http://localhost:8888/cake/events/id:3
I am getting an error saying that id is not defined.
How should I proceed?

Answer 1

when you're passing data via url you can access it via
$this->passedArgs['variable_name'];
For example if your URL is:
http://localhost/events/id:7
Then you access that id with this line
$id = $this->passedArgs['id'];
When you access a controller function that accepts parameters through url, you can use those parameters just as any other variable, like for example say your url looks like this
http://localhost/events/getid/7
Then your controller function should look like:
public function getid($id = null){
// $id would take the value of 7
// then you can use the $id as you please just like any other variable
}

Answer 2

In the Conferences Controller
$this->Session->write('conference_id', $this->request->id); // or the variable that stores the conference ID
In the Events controller
$conferenceId = $this->Session->read('conference_id');
Of course, on top you need
public $components = array('Session');