Updating value of session array as variable

[Davesp]

I want to add values to an array that I use as a session variable. How do I do this?

[Shrike]

$_SESSION['name'][] = "new element";

[Davesp]

Fatal error: [] operator not supported for strings in path/image1b.php on line 42

Do I have to create the array first?

and BTW Should I not use single quotes as in:

$_SESSION['name'][] = 'new element';

I tried with this but get the same error so I guess it's something else.