thinkphp如何写一个增加数据接口，表名：gys ；要加入的字段名：gysname，gysbh；传递过来的是post数据字段分别是 name，bh

<?php
// 假设这里是你的后端代码
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $gysname = $_POST['name'];
    $gysbh = $_POST['bh'];

    // 这里可以进行数据验证和处理

    // 连接数据库并插入数据
    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "database";

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

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

    $sql = "INSERT INTO gys (gysname, gysbh) VALUES ('$gysname', '$gysbh')";

    if ($conn->query($sql) === TRUE) {
        echo "New record created successfully";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }

    $conn->close();
}
?>