从包含Object的多维数组中获取值

Question

如何从这个数组中获取[user_id]？

Array  
(  
      [2] => cbpaidSubscription Object  
        (  
            [replaces_plan] =>   
        [replaces_subscription] =>   
        [subscription_date] => 2009-07-14 12:45:52  
        [last_renewed_date] => 2009-07-14 12:45:52  
        [expiry_date] => 2010-07-14 12:45:52  
        [autorenew_type] => 2  
        [autorecurring_type] => 2  
        [regular_recurrings_total] => 0  
        [regular_recurrings_used] => 1  
        [previous_expiry_date] =>   
        [previous_status] => R  
        [previous_recurrings_used] => 0  
        [ip_addresses] => 127.0.0.1  
        [id] => 2  
        [status] => A  
        [user_id] => 71  
        [plan_id] => 1  
        [parent_plan] => 0  
        [parent_subscription] => 0  
        [integrations] =>   
        [_plan] => cbpaidProductusersubscription Object  
            (  

Answer 1

我在想......

print $arrayName[2]->user_id;

Answer 2

如果您可以保证阵列只有一个项目且您知道密钥，那么请使用Jonathan Sampson的解决方案。否则，如果您有一些项目，可以像这样循环，并为每个项目提取用户ID。

foreach ($array as $item) {
    $userId = $item->user_id;
    //do something with the userId for this item
}