在PHP中访问数组中的受保护对象 [英] Access protected object in array in PHP

问题描述

我尝试访问以下内容并需要获取 [vid] 阵列单元格的值。

I am trying to access the following and need to get the value of [vid] array cell.

FieldCollectionItemEntity Object
(
    [fieldInfo:protected] => 
    [hostEntity:protected] => stdClass Object
        (
            **[vid]** => 119
            [uid] => 1
            [title] => My Page Name
            [log] => 
            [status] => 1
            [comment] => 1
            [promote] => 0
            [sticky] => 0
            [vuuid] => 3304d1cf-e3cf-4c5a-884a-4abb565ddced
            [nid] => 119
            [type] => subpage
            [language] => und
            [created] => 1408621327
            [changed] => 1408640191
            [tnid] => 0
            [translate] => 0
            [uuid] => 39145013-6637-4062-96e7-1b4589609c4f
            [revision_timestamp] => 1408640191

我试过以下，但我想我没有这里的线索： / h2>

I tried the following, but I guess I don't have a clue from here:-

  $mything = new myClass;
  print $mything->accessObjectArray();


  class myClass {
      protected $var;


      function accessObjectArray(){
        return $this-> $var;
      }
      //other member functions
  }

更新

我实际上只能访问具有以下多维数组的变量$ content。所有我想要的是获取数组单元格的值 [vid] 。

为此，我可以打印 $ content [field_image_title] [＃object] 但之后它的受保护。这是我想知道如何访问这个数组。很遗憾，我无法访问 FieldCollectionItemEntity 以包含在我的网页中。

To do that, I could print $content["field_image_title"]["#object"] but after that it's protected. That's where I am wondering that how can I access this array. I unfortunately do not have access FieldCollectionItemEntity to include in my page.

输出： -

 print_r($content);


Array
(
    [field_image_title] => Array
        (
            [#theme] => field
            [#weight] => 0
            [#title] => Image Title
            [#access] => 1
            [#label_display] => hidden
            [#view_mode] => full
            [#language] => und
            [#field_name] => field_image_title
            [#field_type] => text
            [#field_translatable] => 0
            [#entity_type] => field_collection_item
            [#bundle] => field_image_collection
            [#object] => FieldCollectionItemEntity Object
                (
                    [fieldInfo:protected] => 
                    [hostEntity:protected] => stdClass Object
                        (
                            [vid] => 119
                            [uid] => 1
                            [title] => My Page Name
                            [log] => 
                            [status] => 1
                            [comment] => 1
                            [promote] => 0
                            [sticky] => 0
                            [vuuid] => 3304d1cf-e3cf-4c5a-884a-4abb565ddced
                            [nid] => 119
                            [type] => subpage
                            [language] => und
                            [created] => 1408621327
                            [changed] => 1408640191
                            [tnid] => 0
                            [translate] => 0
                            [uuid] => 39145013-6637-4062-96e7-1b4589609c4f
                            [revision_timestamp] => 1408640191
                            [revision_uid] => 1

推荐答案

>

what your are doing with this:

return $this-> $var;

正在访问以 $ var 变量在定义的范围中不包含任何内容。传递它作为一个函数参数：

is accessing a property named after what is contained in your $var variable which does not contain anything in the scope where it is defined. pass it as a function argument:

function accessObjectArray($var){
  return $this-> $var;
}

print $mything->accessObjectArray('vid');

但是在任何情况下都不会工作，因为（如@MikeBrant提到）父对象属性中的对象。这样的东西可能会更好

but in any event, that won't work either since (as mentioned by @MikeBrant) you have an object in your parent object properties. something like this might work better

$o = new FieldCollectionItemEntity() // assumes this will construct the object in the state you have posted it
$o->accessObjectArray('hostEntity')->accessObjectArray('vid');

请注意方法 accessObjectArray（$ var）

受保护属性的想法是防止你想要的实际发生。但！ protected表示只有类及其扩展类可以访问值。创建自己的类扩展另一个：

the idea of a protected property is to prevent what you want to actually happen. But! protected means that only the class and it's extending classes can access a value. Make your own class that extends the other one:

class myClass extends FieldCollectionItemEntity {

      function accessParentProtectedVars($var){
        return $this->hostEntity->$var;
      }
      //other member functions
  }

accessObjectArray（）函数将能够访问protected属性。请注意，它是硬编码以访问 hostEntity 对象。

then your accessObjectArray() function will be able to acces the protected property. note that it's hardcoded to access the hostEntity object.

但严重，您可能想咨询其他类，也许你会设计一种方法来最好地管理这个。如果我敢说，我提出的解决方案不是很好的做法。

but seriously, you may want to consult the creator of the other class and maybe you will devise a way to best manage this. My proposed solution is not that much of a good practice if I daresay.

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