Twig

There can be a mixture of pain twig and craft twig. If it applies to craft only, it will be noted in the heading.

Dump and Die (Craft)

In the Craft Core Class there is a dd function. dd means dump and die. It sits on top of a core Yii2 function for outputting any variable to the screen and stopping the php execution at that point. P&T just added some more functionality and called it dd. What I didn't know until recently is that they make that available as a twig function. So if you want to see the contents of any variable in a template, you can dd it.

{% dd(varname) %}