How does php query the array stored in MongoDB?

The problem I encountered now is the image information stored by others in mongodb. The key is img, and the value is a url array. When I use the mongodb extension of php to query, the img domain returns a string, but what I want to get is the saved array object. Is there any way to get one... the problem I encountered is that MongodbImage Information stored in, KeyIs Img, ValueFor UrlArray.
When I use PhpOf MongodbExtended to query, ImgThe returned field is a string, but what I want to get is the stored array object. Is there any way to get an array object?
Which of the following statements is used for my query? Export cursor: find ()This API. I am also the first time using NoSQL databases ..

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The problem I encountered is thatMongodbImage Information stored in,KeyIsImg,ValueForUrlArray.
When I usePhpOfMongodbExtended to query,ImgThe returned field is a string, but what I want to get is the stored array object. Is there any way to get an array object?
Which of the following statements is used for my query?Export cursor: find ()This API. I am also the first time using NoSQL databases ..

I have never used it, noYou can try to save json_encode ()