Why does ng-repeat not work in php json?

Question

I have a mobile app where I make a ng-repeat to list a photo gallery that well through a JSON php what happens and that I think I have all right but does not list me any image I have tried to query sql directly into sql and gives me no error list as well.

Controller

.controller('VerFotosEstabelecimento', function($scope, $http, $stateParams) {
    $http.get("https://www.sabeonde.pt/api/api_ver_fotos_estabelecimento.php?slug="+$stateParams.EstabelecimentoSlug).success(function (data) {
        $scope.ver_fotos_estabelecimento = data;
    });
})

HTML where list photos

<div class="card">
        <div class="item item-text-wrap">
            <h2 style="margin:0px 0px 10px 0px;">Fotos</h2>
            <div class="row">
                <div class="col" ng-repeat="fotos in ver_fotos_estabelecimento"> 
                    <img ng-src="https://www.sabeonde.pt/gtm/anexos/fotos/{{fotos.id_anexo}}.{{fotos.tipo}}" />
                </div>
            </div>  
            <div style="float: left;" ng-click="fotos()" ng-controller="ModalFotos" class="caixa_limite">+'.$fotos_maior_valida.'</div>
            <div style="float: left; margin:0px 0px 20px 5px;" class="caixa_limite"><i style="font-size: xx-large;" class="ion-camera"></i></div>  
        </div>
</div>   

PHP

header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST');
header("Content-type: application/json");

require_once("../funcoes/funcoes.php");


$result = $conexao->prepare("SELECT * FROM estabelecimentos
                            INNER JOIN estabelecimentos_anexos ON estabelecimentos_anexos.id_mae = estabelecimentos.id
                            WHERE estabelecimentos.slug = :slug  AND estabelecimentos_anexos.seccao = :seccao LIMIT 9");

$result->bindValue(':slug', $_GET['slug'], PDO::PARAM_STR);
$result->bindValue(':seccao', 'fotos', PDO::PARAM_STR);
$result->execute();
$rows = $result->fetchAll(PDO::FETCH_ASSOC);

echo json_encode($rows);