json存入mysql数据库 php

CREATE TABLE `json_data` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `data` JSON NOT NULL
);

<?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("连接失败: " . $conn->connect_error);
}

// JSON数据
$json_data = '{"name":"John", "age":30, "city":"New York"}';

// 插入数据
$sql = "INSERT INTO json_data (data) VALUES ('$json_data')";

if ($conn->query($sql) === TRUE) {
    echo "新记录插入成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>

$stmt = $conn->prepare("INSERT INTO json_data (data) VALUES (?)");
$stmt->bind_param("s", $json_data);
$stmt->execute();