php - 使用 php 访问哈希元素

Question

我有一个哈希数组的形式

[{"sector":"Consumer, Cyclical","ticker":"NWY","entity":"New York & Co","New_York_&_Co":[{"count":1,"entity":"New York"}],"type":"SCap"}]

我正在尝试列出与所有出现的键值“实体”​​相对应的值。我确实使用了 json_decode，

$testJson = json_decode('[{"sector":"Consumer, Cyclical","ticker":"NWY","entity":"New York & Co","New_York_&_Co":[{"count":1,"entity":"New York"}],"type":"SCap"}]');

当我尝试 `echo var_dump($testJson[0]);
它以形式显示输出

array
  0 => 
  object(stdClass)[438]
  public 'sector' => string 'Consumer, Cyclical' (length=18)
  public 'ticker' => string 'NWY' (length=3)
  public 'entity' => string 'New York & Co' (length=13)
  public 'New_York_&_Co' => 
    array
      0 => 
        object(stdClass)[439]
          ...
  public 'type' => string 'SCap' (length=4)

但是echo var_dump($testJson[0]->entity) 或 echo var_dump($testJson[0]->sector) 给我错误..“试图获取非对象的属性”..我做错了什么？

Answer 1

$testJSon= json_decode('[{"sector":"Consumer, Cyclical","ticker":"NWY","entity":"New York & Co","New_York_&_Co":[{"count":1,"entity":"New York"}],"type":"SCap"}]');
//var_dump($testJSon);
echo $testJSon['0']->sector; // will output `Consumer, Cyclical`
echo $testJSon[0]->{'sector'}; // will also output same

您可以将其转换为数组并获取如下值：

$testJSon= json_decode('[{"sector":"Consumer, Cyclical","ticker":"NWY","entity":"New York & Co","New_York_&_Co":[{"count":1,"entity":"New York"}],"type":"SCap"}]',true);
echo $testJSon[0]['entity']; // will return "New York & Co"