Android retrofit 2, Slim request

I have a code that loads all the data about cities. How to pass a string to search for cities containing this string? What request need GET or POST?

Interface

public interface APIService { @FormUrlEncoded @POST("register") Call<Result> createUser( @Field("login") String login, @Field("email") String email, @Field("password") String password, @Field("phone") String phone, @Field("gender") String gender ); @FormUrlEncoded @POST("login") Call<Result> userLogin( @Field("login") String login, @Field("password") String password ); @GET("cities") Call<Cities> getCities(@Query("query")String query); @GET("shops") Call<Shops> getShops(); } 

Code

 public void LoadData(String query){ Retrofit retrofit = new Retrofit.Builder() .baseUrl(APIUrl.BASE_URL) .addConverterFactory(GsonConverterFactory.create()) .build(); APIService service = retrofit.create(APIService.class); Call<Cities> call = service.getCities(query); call.enqueue(new Callback<Cities>() { @Override public void onResponse(Call<Cities> call, Response<Cities> response) { adapter = new CityAdapter(response.body().getCities(),getActivity()); recyclerViewCity.setAdapter(adapter); } @Override public void onFailure(Call<Cities> call, Throwable t) { Toast.makeText(getActivity(),t.getMessage(),Toast.LENGTH_SHORT).show(); } }); } 

PHP I use SLIM:

 $app->get('/cities', function (Request $request, Response $response) { if(isTheseParametersAvailable(array('query'))){ $requestData = $request->getParsedBody(); $query = $requestData['query']; $db = new DbOperation(); $cities = $db->getAllCities($query); $response->getBody()->write(json_encode(array("cities" => $cities))); } }); .... function getAllCities($query){ $stmt = $this->con->prepare("SELECT id, region, autonom, area, city, city_2 FROM locality WHERE ((region LIKE ? and autonom is null and area is null and city is null and city_2 is null) or (city LIKE ? and city_2 is null) or(city_2 LIKE ?))"); $stmt-> bind_param("sss", $query, $query, $query); $stmt->execute(); $stmt->bind_result($id, $region, $autonom, $area, $city, $city_2); $cities = array(); while($stmt->fetch()){ $temp = array(); $temp['id'] = $id; $temp['region'] = $region; $temp['autonom'] = $autonom; $temp['area'] = $area; $temp['city'] = $city; $temp['city_2'] = $city_2; array_push($cities, $temp); } return $cities; } 

An empty string is returned, although if I execute the SQL query in the database, it will return a value.

Where is the mistake? Can I incorrectly pass the query string? or an error in the server side?

In PostMan, you get a GET request: http://localhost/Retrofit/public/cities?query="Москва" and it returns {"cities":[]} .

I tried in $app->get('/cities', insert the default value. In the postman issued a GET request: http://localhost/Retrofit/public/cities

Method after change:

 $app->get('/cities', function (Request $request, Response $response) { $requestData = $request->getParsedBody(); $query = 'Москва'; $db = new DbOperation(); $cities = $db->getAllCities($query); $response->getBody()->write(json_encode(array("cities" => $cities))); }); 

Issued the result:

 {"cities":[{"id":12865,"region":"\u041c\u043e\u0441\u043a\u0432\u0430","autonom":null,"area":null,"city":null,"city_2":null}]} 

It means an error, either in the reception of a variable, or in the transmission. Help me find a bug