使用php从mongoDB获取价值

Question

如何使用'php'获取街道价值？

{

    _id : "001",

    name : "fakename",

    address : {

                street : "12 Street",

                city : "Cosmos",

               }
}

查询：

$collection = database_name->collection_name;

$cursor = $collection->find ( array('name' => 'fakename' ), array( 'address.street' ) );

   foreach ( $cursor as $doc ) {

         echo $doc[ 'address.street' ];
   }

结果：

$doc[ 'address.street' ]

值无法打印。

Answer 1

PHP使用多维数组：

$doc['address']['street']

Answer 2

$db = (new \MongoDB\Client("mongodb://localhost:27017"))->database_name;
$collection = $db->collection_name;
$cursor = $collection->find ( array('name' => 'fakename' ), array( 'address.street' ) );
foreach ($cursor as $doc) {
    echo $doc['address']['street'];
}