Returning elements with php functions

I have a class like this:

class Foo {
    $elements = array();

    function getElementByName($name) {
        foreach($this->elements as $elm) {
            if ($elm->name == $name) {
                return $elm;
            }
        }
    }
}

I expected the following code to modify the element of my array:

$myFoo = new Foo();
$myFoo->getElementByName('foo1')->active = true;

Instead, when running my code, the active property of $elements['foo1'] is still false as it was before calling getElementByName

I think that the function makes a "copy" of the element, how can I get the real element of the array, so that when I modify it, and then access it in the array, its values have changed?