// Set a Decoder instance as a package global, because it caches
// meta-data about structs, and an instance can be shared safely.
var decoder = schema.NewDecoder()

type Person struct {
    Name  string
    Phone string
}

func MyHandler(w http.ResponseWriter, r *http.Request) {
    err := r.ParseForm()
    if err != nil {
        // Handle error
    }

    var person Person

    // r.PostForm is a map of our POST form values
    err = decoder.Decode(&person, r.PostForm)
    if err != nil {
        // Handle error
    }

    // Do something with person.Name or person.Phone
}

var encoder = schema.NewEncoder()

func MyHttpRequest() {
    person := Person{"Jane Doe", "555-5555"}
    form := url.Values{}

    err := encoder.Encode(person, form)

    if err != nil {
        // Handle error
    }

    // Use form values, for example, with an http client
    client := new(http.Client)
    res, err := client.PostForm("http://my-api.test", form)
}

type Person struct {
    Name  string `schema:"name,required"`  // custom name, must be supplied
    Phone string `schema:"phone"`          // custom name
    Admin bool   `schema:"-"`              // this field is never set
}