Why is this output blank?

I know I must be doing something simple wrong. When I do this:

 echo '<pre>';
 print_r($event->when);
 echo '</pre>';

I get this:

 Array
(
[0] => Zend_Gdata_Extension_When Object
    (
        [_rootElement:protected] => when
        [_reminders:protected] => 
        [_startTime:protected] => 2011-06-16T10:00:00.000-05:00
        [_valueString:protected] => 
        [_endTime:protected] => 2011-06-17T11:00:00.000-05:00
        [_rootNamespace:protected] => gd
        [_rootNamespaceURI:protected] => 
        [_extensionElements:protected] => Array
            (
            )

        [_extensionAttributes:protected] => Array
            (
            )

        [_text:protected] => 
        [_namespaces:protected] => Array
            (
                [atom] => Array
                    (
                        [1] => Array
                            (
                                [0] => http://www.w3.org/2005/Atom
                            )

                    )

                [app] => Array
                    (
                        [1] => Array
                            (
                                [0] => http://purl.org/atom/app#
                            )

                        [2] => Array
                            (
                                [0] => http://www.w开发者_StackOverflow社区3.org/2007/app
                            )

                    )

                [gd] => Array
                    (
                        [1] => Array
                            (
                                [0] => http://schemas.google.com/g/2005
                            )

                    )

                [openSearch] => Array
                    (
                        [1] => Array
                            (
                                [0] => http://a9.com/-/spec/opensearchrss/1.0/
                            )

                        [2] => Array
                            (
                                [0] => http://a9.com/-/spec/opensearch/1.1/
                            )

                    )

                [rss] => Array
                    (
                        [1] => Array
                            (
                                [0] => http://blogs.law.harvard.edu/tech/rss
                            )

                    )

            )

    )

)

I'm then trying to get startTime by doing this:

$StartTime = $event->when->startTime;

But I'm not getting anything.

And yet, when I do this:

 pr($event->published);

I get this:

Zend_Gdata_App_Extension_Published Object
(
[_rootElement:protected] => published
[_rootNamespace:protected] => atom
[_rootNamespaceURI:protected] => 
[_extensionElements:protected] => Array
    (
    )

[_extensionAttributes:protected] => Array
    (
    )

[_text:protected] => 2011-06-15T03:32:14.000Z
[_namespaces:protected] => Array
    (
        [atom] => Array
            (
                [1] => Array
                    (
                        [0] => http://www.w3.org/2005/Atom
                    )

            )

        [app] => Array
            (
                [1] => Array
                    (
                        [0] => http://purl.org/atom/app#
                    )

                [2] => Array
                    (
                        [0] => http://www.w3.org/2007/app
                    )

            )

    )

)

and I can do this:

$dateAdded = $event->published->text;
echo $dateAdded;

and I see an output...

---

According to to the official Zend_Gdata_Extension_When documentation, there's a method called getStartTime() which will give you the time.

If you do $event->when[0]->getStartTime() or $event->when[0]->startTime, you'll get the start time.

---

startTime is marked protected. You can't reference it from outside like you did. There must be a getter function 'getStartTime()' function in that object that would allow you to reference it publicly.

EDIT: Also it is returning an object array - not an single object, so you would need to reference the it like: $event[0]->getterFunction() or loop through the array with a foreach accessing the individual objects in the loop