If you reffering to power a wordpress website, with steem content, then, it's already doable by existing tools.
But a more native approach on PHP would be nicier, so not depend on nodejs or javascript.
if you need more ideas on it and wanna chat about it, poke me on Discord, I'll help the best way I can.
I guess, like being able to take content from a wordpress account, link it to your steemit account and allow them both to be utilized with a single application. I guess like putting dtube and steemit together with a wordpress blog on a single platform.