Hi @cfuller,
Welcome to the Zoom Developer Community.
At this time, we unfortunately do not have a ready to use example for PHP or Wordpress, but you can consider implementing this plugin developed by 3rd party developers in your application. Please note that we will not be able to support this plugin.
To know about OAuth with Zoom, please visit: https://marketplace.zoom.us/docs/guides/authorization/oauth/oauth-with-zoom
If you have any specific questions related to OAuth, please let us know and we will continue to assist you.
Cheers,
Ojus