AngularJS "Controller Undefined error" while displaying the scope value in .php extension file -

while displaying scope value in file ".php" extension gives error of undefined controller, while displays scope value properly.

sample code:

<script>   (function(){     var app = angular.module('demoapp', []);     app.controller('democtrl', function($scope){       $scope.name = "test";     });   })(); </script> <div ng-app="demoapp">   <div ng-controller="democtrl">       {{name}}   </div> </div> 

the above code, shows value of name in browser correctly , in console gives following error

"angular.min.js:103 error: [ng:areq] http://errors.angularjs.org/1.3.11/ng/areq?p0=democtrl&p1=not%20a%20function%2c%20got%20undefined"

what wrong code? angular version used 1.3.11