<div
	drag-drop-upload
	clear-on-complete='true'
	action="main.contactImportAction"
	on-complete="uploadComplete(e, data)"
	on-error="uploadError(e, data)"
	on-progress="uploadProgress(progress, e, data)"></div>

controllers.controller('MainCtrl', function($scope){
	$scope.main.contactImportAction = $scope.main.contactImportBase + 0;

	$scope.$watch('main.contactgroup', function() {
		var id = $scope.main.contactgroup.id || 0;
		$scope.main.contactImportAction = $scope.main.contactImportBase + id;
	}, true);
	
	$scope.uploadComplete = function(e, data) {
	}
	
	$scope.uploadProgress = function(progress, e, data) {
		l(progress);
	}
	
	$scope.uploadError = function(e, data) {
	}
});

<?php

class Contact_Controller extends Base_Controller
{
	
	public function post_import()
	{
		try {
			$allowed = array('csv', 'xls', 'xlsx');
			$file = Input::file('file');
			$file_ext = String::lower(File::extension($file['name']));
			$filename = Str::random(32) . uniqid() . '.' . $file_ext;

			if (is_array($file) && isset($file['error']) && $file['error'] == 0) {
				if(! in_array($file_ext, $allowed))
					throw new Exception("Invalid file type.");

				if (Input::upload('file', 'storage/work', $filename))
					return Response::json('{"status":"success"}');
			}

			throw new Exception('Could not upload file.');
		} catch (Exception $e) {
			return $e->getMessage();
		}
	}
}

<?php

$allowed = array('png', 'jpg', 'gif','zip');

if(isset($_FILES['upl']) && $_FILES['upl']['error'] == 0){

	$extension = pathinfo($_FILES['upl']['name'], PATHINFO_EXTENSION);

	if(!in_array(strtolower($extension), $allowed)){
		echo '{"status":"error"}';
		exit;
	}

	if(move_uploaded_file($_FILES['upl']['tmp_name'], 'uploads/'.$_FILES['upl']['name'])){
		echo '{"status":"success"}';
		exit;
	}
}

echo '{"status":"error"}';
exit;