<?php

   $servername = "127.0.0.1";
$username = "xiaophp";
$password = "MKJx6mE5wkJwZ6fE";
$dbname = "xiaophp";
 
// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检测连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}