Question

访问数组元素时出错。

这是我目前的代码：

第一种方法::

var_dump($parent_array->info->gcatname);

错误（第一种方法）::

<b>Notice</b>:  Trying to get property of non-object

第二种方法::

print_r($parent_array[0]['info']['gcatname']);

错误（第二种方法）::

<b>Fatal error</b>:  Cannot use object of type stdClass as array

数组如下：

array(1) {
 [0]=>
 array(2) {
  ["is_parent"]=>
    bool(true)
  ["info"]=>
  object(stdClass)#6 (5) {
    ["id"]=>
    string(1) "1"
     ["gcatname"]=>
      string(9) "Swine Flu"
     ["gcatowner"]=>
      string(13) "Vaccine India"
     ["gcatactive"]=>
      string(1) "1"
     ["gcatadded"]=>
      string(19) "2016-05-01 08:30:36"
    }
  }
}

Answer 1

简单地说：$parent_array[0]['info']->gcatname

array(1) {
 [0]=> // array(2) stands for the fact that this element with index 0 is an array with the size '2' and it can only be accesses using []
 array(2) {
  ["is_parent"]=>
    bool(true)
  ["info"]=>// object(stdClass) stands for the fact that this element with index 'info' is an array with the size '5' and it can  be accesses using ['info']
  object(stdClass)#6 (5) {// here you have accessed the object now when you wish to access inside this scope you need to use this ->
    ["id"]=>
    string(1) "1"
     ["gcatname"]=>//by using ->gcatname you access the property gcatname of the object
      string(9) "Swine Flu"
     ["gcatowner"]=>
      string(13) "Vaccine India"
     ["gcatactive"]=>
      string(1) "1"
     ["gcatadded"]=>
      string(19) "2016-05-01 08:30:36"
    }
  }
}

PHP：不能使用stdClass类型的对象作为数组

1 个答案: