I have created a jsfiddle, were i am tring to perform a http get using $http when clicked on the test button, The syntax and the structure of $http.get seems correct to me, but it is not sending the selected params (query string {data:$scope.newuser}) in the url.
here is the fiddle :
jsfiddle.net/8sZLs/2/
And at php side i tried , But not showing the values posted