wastesortingserver/database/DbUtil.php

<?php

require "../config.php";
require "../Log.php";

class DbUtil
{

    private static function getConn()
    {
        try {
            $conn = new mysqli(db_config["servername"], db_config["username"], db_config["password"], db_config["dbname"]);
            if ($conn->connect_error) {
                error("数据库连接失败");
            } else {
                info("数据库连接成功");
            }
            return $conn;
        } catch (Exception $e) {
            error("数据库连接异常");
            die("数据库连接异常");
        }
    }

    private static function closeConn(mysqli $conn)
    {
        try {
            if ($conn->close()) {
                info("成功关闭数据库");
            } else {
                error("无法关闭数据库");
            }
        } catch (Exception $e) {
            error("关闭数据库连接出现异常：" . $e);
        }
    }

//    插入数据
    public static function insert($sql, $types, ...$_)
    {

        try {// 创建连接
            $conn = self::getConn();
            $stmt = $conn->prepare("$sql");//        参数绑定
            $stmt->bind_param($types, ...$_);//        执行sql
            $stmt->execute();//        关闭连接
            info("执行sql.$sql.成功");
            self::closeConn($conn);
        } catch (Exception $e) {
            error("插入数据异常" . $e);
        }
    }
}