file_get_contents('php://input') always returns an empty string

Question

I\'m building a PHP RESTful API, following this tutorial. The following function, which should return the data sent with the request when the \'put\' method is used, returns

Answer 1

{
  "action":"get_events_by_category",
  "category_id":2
}

Your row string data must be a Double quote "" not use single ''