角度搜索过滤器不起作用（PHP返回的数据）

I dont get the search filter working.

projects template:

<h3>Projekte</h3>
Search: <input ng-model="searchText">
<table class="table">
    <thead>
        <tr>
            <th>ID</th>
            <th>Title</th>
            <th>Long Title</th>
            <th></th>
        </tr>
    </thead>
    <tbody>
        <tr ng-repeat="(key, project) in projects | filter:searchText">
            <td>{{key}}</td>
            <td>{{project.title}}</td>
            <td>{{project.longTitle}}</td>
            <td><button class="btn btn-default" ng-click="edit()"><i class="fa fa-pencil"></i></button></td>
        </tr>
    </tbody>
</table>

controller:

var secProjects = function ($http,$scope, $modal) {

    $http.post('php/data.php').
    success(function(data) {
        $scope.projects = data;
    })

}

php:

while($row = mysql_fetch_object($result)){
        $data[$row->ID] = array ('id'=>$row->ID,'title'=>$row->Title,'longTitle'=>$row->TitleLong, 'textDE'=>$row->DescriptionDE,'start'=>$row->DateStart,'end'=>$row->DateEnd);
    }
    echo json_encode($data);

i hope you can help me :( I think the reason ist the way i get the data in my scope. but iam not sure.

EDIT: Change the PHP solved the Problem:

   $data = array();
   while($row = mysql_fetch_object($result)){
      array_push($data,['id'=>$row->ID,'title'=>$row->Title,'longTitle'=>$row->TitleLong]);
   }
   echo json_encode($data);

The problem is that your backend returns the data as an object instead of an array.
But the filter works only on arrays (according to the docs):

Selects a subset of items from array and returns it as a new array.

So, you have two options:

1.
Before assigning the data to your scope, convert them from object to array. E.g.:

$http.post(...).success(function (data) {
    $scope.projects = [];
    for (var key in data) {
        $scope.projects.push(data[key]);
    }
});

2.
Have your backend return the data as a JSONified array, instead of an object.
The reason PHP is interpreting your $data "array" as an object is that the indices are not sequential (starting from 0). I.e. instead of having indices 0, 1, 2..., you had 1,2,3.... (See, this answer for more info.)
To fix this, you can change your code, like this:

$data[] = array (...

See, also, this short demo.

I've duplicated your work, without the service call here. It's exactly the same except for your post (should be a get). And it works fine. Take some more time to check your work. Javascript errors may disable further functionality. .

    $scope.projects = [{
    title: 'one',
    longTitle: 'one long title'
}, {
    title: 'two',
    longTitle: 'two long title'
}];