PHP 中的量會自己變化？是我沒搞懂 this 嗎？

This topic created in 3833 days ago, the information mentioned may be changed or developed.

代碼：
```
$code = $this->json()->ret;

var_dump($this->json());
var_dump($this->json()->ret);
var_dump($code);
```

輸出：
`object(stdClass)#2 (1) { ["ret"]=> string(3) "205" } string(3) "205" string(1) "0"`

請指教。

string var_dump this-JSON