Question

I have a problem to get an object from an array-collection of objects by ID.

The following is my code:

protected $_rootLocation;

public function __construct(Location $rootLocation)
{
    $this->_rootLocation= $rootLocation;

    var_dump($this->_rootLocation);
}

public function getLocationById($id)
{
    $value = null;
    foreach($this->_rootLocationas $root)
      {
            if ($id == $root->getId())
            {
                $value = $root;
                break;
            }
       }

    return $value;
}

Then the function return “NULL” so it’s dosn’t work…

Edit

I do like that :

    $manager = new LocationManager($rootLocation);

    echo "<pre>";
    var_dump($manager->getLocationById('291'));
    echo "</pre>";

Answer 1

Your function returns null because the object is not found!

It depends on the implementation of the myClasse object, this must implement the iterator interface and the getId() method must return a valid Id on each iteration.