Php Code

Hi

That should be achieved by using either Shortcode or Widget. For example install some plugin what allows showing random post as Widget and in Appearance->Widgets apply it to “Scrollbox / Dreamgrow scroll triggered box” Widget area.

If you don’t find any suitable plugin for your exact purpose, then I suggest to create your own plugin what implements Shortcode or Widget. That’s the correct way of executing custom PHP and otherwise you paint yourself into the corner.