file_put_contents doesn't work with json laravel & p

我尝试了一切将项目推入json文件，但当调用时file_put_contents("file.json",$data)不工作，页面关闭。

这是我的控制器代码

public function addJson()
{
    $titulo = Input::get('title');
    $name = Input::file('image')->getClientOriginalName();
    $arr = json_decode(file_get_contents("js/data.json"), true);
    array_push($arr['galerias'], array('id' => count($arr['galerias'])+1, 'name' => $name, 'img' => 'galeria/'.$name));
    $arr2 = $arr['galerias'];
    $arr = json_encode($arr);
    echo $arr;
    file_put_contents('js/data.json', $arr);
    return view('main.prueba')->with('name',$arr2);
}

这是json文件。

{
 "galerias": [
{
  "id": 1,
  "name": "Fiesta Privada",
  "img": "galeria/FP.JPG"
},
{
  "id": 2,
  "name": "Fiesta Privada",
  "img": "galeria/FP2.JPG"
},
{
  "id": 3,
  "name": "Fiesta Privada",
  "img": "galeria/FP3.JPG"
},
{
  "id": 4,
  "name": "Fiesta Privada",
  "img": "galeria/FP4.JPG"
},
{
  "id": 5,
  "name": "Fiesta Privada",
  "img": "galeria/FP5.JPG"
},
{
  "id": 6,
  "name": "Fiesta Privada",
  "img": "galeria/FP6.JPG"
},
{
  "id": 7,
  "name": "Los Kjarkas",
  "img": "galeria/Los_Kjarkas.jpg"
},
{
  "id": 8,
  "name": "Palmenia Pizarro",
  "img": "galeria/Palmenia_Pizarro.jpg"
},
{
  "id": 9,
  "name": "Palmenia Pizarro",
  "img": "galeria/Palmenia_Pizarro_2.jpg"
},
{
  "id": 10,
  "name": "Palmenia Pizarro",
  "img": "galeria/Palmenia_Pizarro_3.jpg"
}
]
}