I know of four PHP static site generators.
Jigsaw: Laravel Blade templates. Source Code Couscous: Twig templates. Source Code Sculpin: Twig templates. Source Code Spress: Twig templates. Source Code The key advantage is obvious: dynamicity “technically” comes for free. Feedback/debugging loops “can” be made instantaneous, and scaling to a large output is probably not too difficult.
One downside is that corporate minded developers and consumers online will think you’re a noob for choosing PHP.