协助构建数组结构以重新创建 JSON 文件

Question

好的，所以我有以下 JSON 结构，

[
  {
    "User_ID": "2",
    "DESCRIPTION": "No Description Specified",
    "AGE": "20",
    "COUNTRY": "UK",
    "GENDER": "MALE",
    "ORIENTATION": "Straight",
    "PROFILE_IMG": "Thumb1403569297.jpg" 
  }
]

我正在从我的数据库中返回这些数据，构建一个结果数组，然后对其进行 json 编码。

"SELECT User_Posts.User_ID,
                   User_Account_Details.DESCRIPTION AS DESCRIPTION,
                   User_Account_Details.AGE AS AGE,
                   User_Account_Details.COUNTRY AS COUNTRY,
                   User_Account_Details.GENDER AS GENDER,
                   User_Account_Details.ORIENTATION AS ORIENTATION,
                   User_Account_Details.PROFILE_IMG AS PROFILE_IMG                
                        FROM User_Posts
                        INNER JOIN User_Account_Details ON User_Posts.User_ID = User_Account_Details.User_ID;
                       "

和

$users = array();
while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
    $users[] = $row;
}

echo json_encode($users);

但是，这个：

[
  {
    "User_ID": "2",
    "DESCRIPTION": "No Description Specified",
    "AGE": "20",
    "COUNTRY": "UK",
    "GENDER": "MALE",
    "ORIENTATION": "Straight",
    "PROFILE_IMG": "Thumb1403569297.jpg",
    "NETWORKS": [
      {
        "TWITTER": "USERBOB"
      },
      {
        "KIK": "BLLOO"
      }
    ]
  }
]

是我想要实现的结构吗，这可能需要一个单独的 SQL 查询来收集“网络”，我的问题是“我必须如何”构造我的循环并构建数组，这样输出？

网络查询：

SELECT User_Posts.User_ID,
User_Social_Networks.NETWORK AS NETWORK,
User_Social_Networks.USERNAME AS USERNAME
FROM User_Posts
LEFT JOIN User_Social_Networks ON User_Posts.User_ID = User_Social_Networks.User_ID;

网络sql结构

CREATE TABLE IF NOT EXISTS `User_Social_Networks` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `USER_ID` int(11) NOT NULL,
  `NETWORK` varchar(12) NOT NULL,
  `USERNAME` varchar(30) NOT NULL,
  PRIMARY KEY (`ID`),
  UNIQUE KEY `User_id_network_id` (`USER_ID`,`NETWORK`),
  KEY `USER_ID` (`USER_ID`)
)

Answer 1

这应该会给你所需的 JSON

$users = array();
while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
    $network = $result2->fetch(PDO::FETCH_ASSOC)
    $row['NETWORK'] = $network
    $users[] = $row;
}

echo json_encode($users);