http_response_code() in php - php

Question

I'm kind of new to php, I'm using angularJS on the front end that looks like this
app.controller('customersCtrl', function($scope, $http) {
$scope.element = function(num){
var element_id = num;
$http.get("customers.php",{params:{"id":element_id}}).then(function (response) {
$scope.myData = response.data;
});
};
});
PHP code
http_response_code(404);
header("Content-Type: application/json");
exit();
When element_id = 6 I want to fire the http_response_code. Only thing is I'm not seeing anything. The php was taken from the schools example. What am I doing wrong? How do I get the 404 message to display? Am I even thinking of this in the right context? I've some article online but nothing really helps me much. Thanks in advance.

Answer 1

What am I doing wrong?
You are not handling non-success status codes in your $http request.
If you want to get the 404 message then you need to handle the error in your error callback like so:
app.controller('customersCtrl',
function($scope, $http) {
$scope.element = function(num) {
var element_id = num;
$http.get("customers.php", {
params: {
"id": element_id
}
}).then(function(response) {
$scope.myData = response.data;
}, function(error) {
// this is where you handle your error
console.log(error);
});
};
});