php api doesnt send any message to react native app

one text

Solution:

You are probably missing parsing response.data as json in your react-native code. Convert the raw data you received to json using JSON.parse(response.data).

So you could replace your sendRating method with this:

function sendRating() {
  axios
    .post("http://192.168.1.107/restaurant/setRate.php", {
      rating: this.state.Default_Rating,
      ID: this.state.restId,
    })
    .then((response) => {
      var jsonResponseData = JSON.parse(response.data);
      if (jsonResponseData.message == "success") {
        alert("امتیاز شما ثبت شد");
      } else if (jsonResponseData.message == "failure") {
        alert("لطفا بعدا دوباره تلاش کنید");
      } else {
        alert(jsonResponseData.message);
      }
    });
}

Note: Make sure that the response is not null and also that the data is a valid json before parsing.