无法从AngularJS $ http.post获取发布数据

Very new with AngularJS, I'm sure it's something simple I'm doing wrong but I cannot figure it out. All I'm trying to do is log the incoming POST from Angular, using PHP.

AngularJS function:

$scope.addTask = function() {
        $http.post('process.php', { newTask: $scope.newTask });
        $scope.newTask = '';
    };

process.php:

if (isset($_POST['newTask'])) {
        createLog('test');
    }

function createLog ($str) {
    $file = 'log.txt';
    $str .= "
";
    file_put_contents($file, $str, FILE_APPEND | LOCK_EX);
}

If you are sending in a POST to PHP from angular, you need to retrieve it a bit differently in your backend. As noted by @charlietfl, the $_POST is empty. I have been out of the PHP game for a while but this should work for you.

$data = file_get_contents("php://input");
$request = json_decode($data);