checking database and validate form with angular - angularjs

Question

I can use ajax to check infomation in database with jquery but I dont know do same with angularjs . I use
$http({
type : "post",
dataType : "JSON",
url : "register.php",
data : data,
success : function(result)
{
....
}
php code
$errors = array(
'error' => 0
);
$username = $_POST['username']
$password = $_POST['password']
$email =$_POST['email']
$fullname = $_POST['fullname']
$sql = "SELECT * "
. "FROM USERS "
. "WHERE username='".$username."' "
. "OR email='".$email."'";
if (mysqli_num_rows($result) > 0)
{
$row = mysqli_fetch_assoc($result);
if ($row['username'] == $username){
$errors['username'] = 'Tên đăng nhập đã tồn tại';
}
if ($row['email'] == $email){
$errors['email'] = 'Email đã tồn tại';
}
}
if (count($errors) > 1){
$errors['error'] = 1;
die (json_encode($errors));
}else{
//insert database
}
$result = mysqli_query($conn, $sql);
but I dont know do next step . I want check in database if have user name show message error else show succes .Pls help me

Answer 1

Using success is deprecated but you're on the right path. Here's how you would do it now:
$http({
type : "post",
url : "register.php",
data : data
}).then(function(response){
// If data is returned, do stuff with it here
console.log('Yay, my data was POSTed', response.data);
}, function(response){
console.log('Aww, it failed.');
});
It would be easier to help you further, if you add a bit more information on what you're actually trying to achieve. For instance what is returned by this "register.php" endpoint, and what you intent to do after this.

Answer 2

check the DOC for $http.
The $http service is a function which takes a single argument — a configuration object — that is used to generate an HTTP request and returns a promise.
The response comes under promise (.then).
$http({
type : "POST",
url : "register.php",
data : data,
}).then(function successCallback(response) {
// this callback will be called asynchronously
// when the response is available/success
console.log(response.data)
}, function errorCallback(response) {
// called asynchronously if an error occurs
// or server returns response with an error status.
console.log(response.data)
});