Question

我正在使用以下函数，其中$task是TaskData个实例的数组

var_dump(array_pop($task));

// outputs when used repeatdly:
object(TaskData)[18]
  private 'id_task' => string '4' (length=1)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[22]
  private 'id_task' => string '9' (length=1)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[27]
  private 'id_task' => string '18' (length=2)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[46]
  private 'id_task' => string '42' (length=2)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[18]
  private 'id_task' => string '47' (length=2)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[36]
  private 'id_task' => string '57' (length=2)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[35]
  private 'id_task' => string '63' (length=2)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[41]
  private 'id_task' => string '68' (length=2)
  private 'name' => null
  private 'process_id' => null

object(TaskData)[26]
  private 'id_task' => string '70' (length=2)
  private 'name' => null
  private 'process_id' => null

如何访问id_task项（在示例中：'4','9','18','42'）？

Answer 1

$task似乎是TaskData个实例的数组。您尝试联系的会员是私人会员。一个read on visibility

private 'id_task'

如果它是公开的，可以通过这种方式达成：

foreach ($task as $taskData) {
    var_dump($taskData->id_task);
}

you're perfectly right，为私人会员设置公共getter是一个更好的主意：

public function getTaskID() {
    return $this->id_task;
}

从数组中获取特定的对象项

1 个答案: