Question

我正在研究一个WordPress项目，并从post meta获取数据。

Queue<Integer> q1 = new LinkedList<>()

/**
 * Queue operations.
 * Retrieves, but does not remove, the head (first element) of this list.
 *
 * @return the head of this list, or {@code null} if this list is empty
 * @since 1.5
 */

此后，我将对象转换为此处的数组

$data_post = get_post_meta(get_the_ID(), 'map_pointers');

OutPut
array (size=1)
  0 => string '{"1":[{"point_pp":"a","point_name":"a","point_position":"a","point_department":"a","point_address":"test address<br />Test Address 2","point_phone":"a","point_email":"test@gmail.com","pint":"1","postID":"35"},{"point_pp":"a","point_name":"a","point_position":"sad","point_department":"a","point_address":"test address","point_phone":"123456789","point_email":"test@gmail.com","pint":"1","postID":"35"}]}' (length=466)

它转换得很完美，但是之后，我将计数器添加到每个数组中

$data_post = (array) json_decode(trim($data_post[0],'"'));

上面的代码在PHP7.2或更高版本中工作正常，结果显示如下

$data_post = get_post_meta(get_the_ID(), 'map_pointers');
if(!empty($data_post)) {
    $data_post = (array) json_decode(trim($data_post[0],'"'));
    if(isset($data_post[$countPoint])) {
        $data_post = (array) $data_post[$countPoint];
    } else {
        $data_post = null;
    }
}
var_dump($data_post); // Shows null

我在做什么错？还是我必须为后备版本写点东西？

数组对象在PHP 7.0版本中不起作用

0 个答案: