在PHP中创建嵌套的JSON对象

$data = array(
    'name' => 'John',
    'age' => 30,
    'email' => 'john@example.com',
    'address' => array(
        'street' => '123 Street',
        'city' => 'New York',
        'state' => 'NY'
    ),
    'friends' => array(
        array('name' => 'Jane', 'age' => 28),
        array('name' => 'Bob', 'age' => 32)
    )
);

$json = json_encode($data);
echo $json;

{
    "name": "John",
    "age": 30,
    "email": "john@example.com",
    "address": {
        "street": "123 Street",
        "city": "New York",
        "state": "NY"
    },
    "friends": [
        {
            "name": "Jane",
            "age": 28
        },
        {
            "name": "Bob",
            "age": 32
        }
    ]
}