php - 数组与对象和更多数组混合

Question

我的数组的 var_dump 显示为这样。我想获取数组中 my_options 的计数。请注意，索引 2 没有选项。我该怎么做

var_dump($myVar);


array
  0 => 
    object(app\models\Product)[209]
      protected '_Nested' => 
        array
          empty
      protected '_Sibling' => 
        array
          empty
      protected '_class' => string 'app\models\Customer' (length=18)
      protected '_data' => 
        array
          '_id' => int 345543
          'customer_name' => string 'John Dee' (length=14)
          'Sibling' => 
            array
              ...
          'my_options' => 
            array
              ...
          'Nesting' => 
            array
              ...
          'image' => string 'img.jpg' (length=35)
          'inventory' => 
            array
              ...
          'name' => string 'papa john' (length=35)
          'price' => float 26
          'status' => int 1
1 => 
    object(app\models\Product)[209]
      protected '_Nested' => 
        array
          empty
      protected '_Sibling' => 
        array
          empty
      protected '_class' => string 'app\models\Customer' (length=18)
      protected '_data' => 
        array
          '_id' => int 89237
          'customer_name' => string 'Linda Arap' (length=14)
          'Sibling' => 
            array
              ...
          'my_options' => 
            array
              ...
          'Nesting' => 
            array
              ...
          'image' => string 'img2.jpg' (length=35)
          'inventory' => 
            array
              ...
          'name' => string 'Pizza Hut' (length=35)
          'price' => float 26
          'status' => int 1
2 => 
    object(app\models\Product)[209]
      protected '_Nested' => 
        array
          empty
      protected '_Sibling' => 
        array
          empty
      protected '_class' => string 'app\models\Customer' (length=18)
      protected '_data' => 
        array
          '_id' => int 89237
          'customer_name' => string 'Linda Arap' (length=14)
          'Sibling' => 
            array
              ...

Answer 1

_data是 protected 变量，因此您将无法从对象外部访问它。您需要使用(或创建)一个 getData()访问 $this->_data 的方法.只需调用该方法，您就可以访问选项数组。

访问 _data 并返回 my_options 的示例方法:

public function getMyOptions() {
  return $this->_data['my_options'];
}

可以通过以下方式调用:

$product instanceof app\models\Product;
$myOptions = $product->getMyOptions();

此外，看起来您正在使用模型(可能是 orm)类。我想它有内置的方法来访问数据数组。常用访问方法 my_options将是:

$options = $product->my_options; // via magic methods
$options = $product->get('my_options');
$options = $product->getField('my_options');