ChatGPT API response to json

Hello everyone,

Im facing a problem to parse chatGPT API response to json using laravel/php.

```json\n
{\n
"classes": {\n
....
}\n```

Sometimes api returns below response

Here is your response blah blah
```json\n
{\n
"classes": {\n
....
}\n
```blah blah blah

And how can I parse some special strings or code snippet because sometimes I got null from this line json_decode($api_response);