在Mysql中插入JSON问题(ajax/php)

$.ajax({
    url: 'insert_json.php', // PHP处理文件
    type: 'POST',
    contentType: 'application/json',
    data: JSON.stringify({
        name: 'John Doe',
        age: 30,
        email: 'john@example.com'
    }),
    success: function(response) {
        console.log('Data inserted successfully:', response);
    },
    error: function(xhr, status, error) {
        console.error('Error inserting data:', error);
    }
});

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// 获取JSON数据
$jsonData = file_get_contents('php://input');
$data = json_decode($jsonData, true);

// 插入数据到MySQL
$sql = "INSERT INTO users (name, age, email) VALUES (?, ?, ?)";
$stmt = $conn->prepare($sql);
$stmt->bind_param("sis", $data['name'], $data['age'], $data['email']);

if ($stmt->execute()) {
    echo json_encode(['status' => 'success']);
} else {
    echo json_encode(['status' => 'error', 'message' => $stmt->error]);
}

$stmt->close();
$conn->close();
?>