phpDocumentor seems to be the standard for documenting PHP code, though I have to wonder why it hasn\'t been updated in years..?
However, it does not seem suitable f
Swagger seems promising but it will require your API expose itself in a compatible manner... it is quite nice, however, with a test console, etc all built-in... you can download a javascript version and run it on your server alongside the php api.
EDIT: here is the link, it isnt so easy to find on google if you dont have the full name... lol... Swagger-UI: https://github.com/wordnik/swagger-ui