为什么get_object_vars返回受保护的属性？

Question

我现在已经使用get_object_vars了一段时间..它总是只返回一个对象的公共属性，但突然它也会返回受保护的变量？！？怎么可能？

之前从未这样做过

码

print_r($row);
print_r(get_object_vars($row));

返回

Data_model_Accounting Object
(
    [get_external:protected] => 1
    [put_external:protected] => 1
    [delete_external:protected] => 1
    [post_class:protected] => 1
    [external_field_const:protected] => Array
        (
            [type] => Array
                (
                    [0] => LEDGER
                    [1] => DEBTOR_LEDGER
                    [2] => CREDITOR_LEDGER
                    [3] => DEBTOR_INVOICE
                    [4] => CREDITOR_INVOICE
                )

        )

    [external_field_condition_unset:protected] => Array
        (
            [invoice_id_] => Array
                (
                    [type] => Array
                        (
                            [mode] => not_in
                            [values] => Array
                                (
                                    [0] => DEBTOR_INVOICE
                                    [1] => CREDITOR_INVOICE
                                )

                        )

                )

            [invoice_time_due] => Array
                (
                    [type] => Array
                        (
                            [mode] => not_in
                            [values] => Array
                                (
                                    [0] => DEBTOR_INVOICE
                                    [1] => CREDITOR_INVOICE
                                )

                        )

                )

        )

    [table:protected] => 
    [predata:protected] => Array
        (
        )

    [data:protected] => Array
        (
        )

    [external:protected] => 1
    [put_error:protected] => 
    [action_mode:protected] => 
    [Shell:protected] => 
    [access_admin_primary:protected] => 1
    [get_admin_external:protected] => 
    [put_admin_external:protected] => 
    [delete_admin_external:protected] => 
    [id] => 19
    [time] => 1362787200
    [type] => DEBTOR_LEDGER
    [account_id_] => 16000
    [account_name] => Debitor
    [accountoff_id_] => 16000
    [accountoff_name] => Debitor
    [vatcode_name] => 
    [subaccount_id_] => 10
    [subaccount_type] => DEBTOR
    [subaccount_name] => hehe
    [subaccountoff_id_] => 101
    [subaccountoff_type] => DEBTOR
    [subaccountoff_name] => oskel
    [dimension_name] => 
    [dimensionoff_name] => 
    [currency_name] => 
    [invoice_id_] => 
    [invoice_time_due] => 0
    [amount] => -165
    [currency_amount] => -165
    [currency_rate] => 1
)
Array
(
    [table] => 
    [predata] => Array
        (
        )

    [data] => Array
        (
        )

    [external] => 1
    [put_error] => 
    [action_mode] => 
    [Shell] => 
    [access_admin_primary] => 1
    [get_admin_external] => 
    [put_admin_external] => 
    [delete_admin_external] => 
    [id] => 19
    [time] => 1362787200
    [type] => DEBTOR_LEDGER
    [account_id_] => 16000
    [account_name] => Debitor
    [accountoff_id_] => 16000
    [accountoff_name] => Debitor
    [vatcode_name] => 
    [subaccount_id_] => 10
    [subaccount_type] => DEBTOR
    [subaccount_name] => hehe
    [subaccountoff_id_] => 101
    [subaccountoff_type] => DEBTOR
    [subaccountoff_name] => oskel
    [dimension_name] => 
    [dimensionoff_name] => 
    [currency_name] => 
    [invoice_id_] => 
    [invoice_time_due] => 0
    [amount] => -165
    [currency_amount] => -165
    [currency_rate] => 1
)

Answer 1

不，这不是新行为，也不是一夜之间传到你电脑里的行为。

来自the documentation：

  

返回范围内指定对象的已定义对象可访问非静态属性的关联数组。

未提及访问级别。

但是， 是一个未记录的方面，归结为可见性和范围，由在同一文档页面上留下以下注释的用户报告：

  

请注意这是范围敏感的事实。 如果您是从对象自己的方法调用它，那么也将输出私有和受保护的变量。从对象外部调用它，结果很可能是您要存档的内容。

文档是你的朋友。 使用。

Answer 2

您使用的是哪个版本的PHP？

如果您在Data_model_Accounting :: method中调用get_object_vars，那么受保护的属性应该是可见的。