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For more information, refer to the Appendix.
As a general rule: when dealing with vectors (objects and arrays) we should use the
assignRef() method; when dealing with scalars (basic data types) we should use
the assign() method.
Finally in our overridden display() method we call the parent display()
method. This is what loads and renders the layout, but we do not have a layout. In
components, layouts are unique to HTML views.
Layouts are essentially templates; in most cases, there is one template file per layout,
which displays a view. Template files are PHP files, which mainly consist of XHTML
and use small snippets of PHP to display dynamic data.
In theory, we do not actually need layouts because we can just echo data directly out
of the view class. However, layouts enable us to define multiple layouts for the same
view, so we can view the same data in a number of different ways.
To create a default layout we create a file called default.php in the view's tmpl
folder. This is the layout that will be used unless otherwise specified.


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