如何使用PHP将对象推送到对象中的数组

我正在学习如何在php中使用对象和数组。我以前在php中有一个类别数组和一个按类别组织的对象数组：

public function live_scenarios_by_category(){
  $scenario_list = $this->scenarios_model->get_scenario_data();
  if ($scenario_list){
    $categories = array();
    $scenarios_by_category = array();
    $curCatIndex = -1;
    $curCatName = NULL;
    foreach ($scenario_list as $i=>$scenario){
      $category_name = $scenario['t3'];
      if ($curCatName != $category_name){
        $curCatIndex+=1;
        $categories[$curCatIndex] = $category_name;
        $curCatName = $category_name;
      }
      $scenarios_by_category[$curCatIndex][] = $scenario;
    }
    $data['categories'] = $categories;
    $data['scenarios_by_category'] = $scenarios_by_category;
    $this->load->view('data/json_scenarios', $data);
  }
}

然后，我可以成功输出类别或按类别输出场景：

echo json_encode($categories);

或

但我想让“类别”数组变成一个由每个类别组织的对象（场景）数组，形式如下：

[{name: "cat1", children: [{name: "scenario1"},{name: "scenario2"}...]}{name:"cat2", children: [...]}];

我尝试按如下方式修改代码：

public function live_scenarios_by_category(){
  $scenario_list = $this->scenarios_model->get_scenario_data();
  if ($scenario_list){
    $categories = array();
    $scenarios_by_category = array();
    $curCatIndex = -1;
    $curCatName = NULL;
    foreach ($scenario_list as $i=>$scenario){
      $category_name = $scenario['t3'];
      if ($curCatName != $category_name){
        $curCatIndex+=1;
        //$categories[$curCatIndex] = $category_name;
        $cat_obj = new stdClass;
        $cat_obj->name = $category_name;
        $cat_obj->children = array();
        $categories[$curCatIndex] = $cat_obj;
        $curCatName = $category_name;
      }
      array_push($categories[$curCatIndex]['children'],$scenario);
      //$categories[$curCatIndex]['children'][] = $scenario;
    }
    $data['categories'] = $categories;
    //  $data['scenarios_by_category'] = $scenarios_by_category;
    $this->load->view('data/json_scenarios', $data);
  }
}

但是我得到了错误

Cannot use object of type stdClass as array

行中：

array_push($categories[$curCatIndex]['children'],$scenario);

---

哪里出错了？

要访问php中的对象，请使用

->

您正在使用的

[]

是一个数组

试着改变这个

array_push($categories[$curCatIndex]['children'],$scenario);

到

---

如果有关联数组，则可以转换为以下对象：

关联数组

将关联数组转换为Json对象

将Json对象转换为Json PHP（PHP中的对象）

---

和：

$object=（object）$array太长了。好主意，这是另一个解决方案！
array_push($categories[$curCatIndex]['children'],$scenario);

array_push($categories[$curCatIndex]->children,$scenario);

$associateArray = array(
                'name'          => 'Beef',
                'quantity'      => 1,
                'unit'          => 'ks',
                'unit_price'    => 120
        );

$JsonObject = json_encode($associateArray);

$JsonPhpObject = json_decode($JsonObject);
echo $JsonPhpObject->name;