無法從數組中獲取值

Question

這是我要從中提取值[_answer：protected]和[_correct：protected]的數組

Array
(
    [0] => Model_AnswerTypes Object
        (
            [_answer:protected] => True
            [_html:protected] => 
            [_points:protected] => 1
            [_correct:protected] => 1
            [_sortString:protected] => 
            [_sortStringHtml:protected] => 
            [_mapper:protected] => 
        )

    [1] => Model_AnswerTypes Object
        (
            [_answer:protected] => False
            [_html:protected] => 
            [_points:protected] => 1
            [_correct:protected] => 
            [_sortString:protected] => 
            [_sortStringHtml:protected] => 
            [_mapper:protected] => 
        )
)

我在用什么

$key = '_answer:protected';
foreach ($array as $data)
    {
        echo $data[0]->$key;
    }

從中獲取空白數組

非常感謝任何幫助

Answer 1

假設您對模型類有所了解，我認為以下可能是您想要的。

foreach ($array as $data)
{
    echo $data->answer; //(assumes Model_AnswerTypes::_get($name) is defined)
}

如果那不起作用，請嘗試

foreach ($array as $data)
{
    echo $data->getAnswer(); // assumes getter/setter pattern
}

Answer 2

$key = '_answer:protected';
foreach ($array as $data)
{
    echo $data->$key; // The 0 is not needful because you make a foreach :)
} 

Answer 3

您有一個對象數組，而不是直值。

由於您要讀取的Model_AnswerTypes對象的值受到保護，因此您需要使用一種方法來獲取它（或者該類需要使用__get（）魔術方法）。

通常的方法是

$data->getAnswer();

要么

$data->answer; //if the __get() method is implemented, a more unusual  form would be $data->_answer