使用mysql和PHP创建嵌套JSON

<?php
// 连接到MySQL数据库
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 创建表格
$sql = "CREATE TABLE nested_json (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    data JSON
)";

if ($conn->query($sql) === TRUE) {
    echo "表格创建成功";
} else {
    echo "表格创建失败: " . $conn->error;
}

// 插入数据
$data = array(
    'name' => 'John Doe',
    'age' => 30,
    'email' => 'johndoe@example.com',
    'address' => array(
        'street' => '123 Street',
        'city' => 'New York',
        'state' => 'NY'
    )
);

$jsonData = json_encode($data);

$sql = "INSERT INTO nested_json (data) VALUES ('$jsonData')";

if ($conn->query($sql) === TRUE) {
    echo "数据插入成功";
} else {
    echo "数据插入失败: " . $conn->error;
}

// 查询数据
$sql = "SELECT data FROM nested_json";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $jsonData = $row['data'];
        $decodedData = json_decode($jsonData, true);

        // 打印解码后的数据
        print_r($decodedData);
    }
} else {
    echo "没有数据";
}

$conn->close();
?>