请问PHP怎样用面向对象方式连接MySQL数据库?

<?php

$servername = "localhost" //你的连接地址，可以是ip

$username   = "username" //你的用户名

$password   = "password" //你的密码

$dbname     = "myDB" //你要连接数据库的名字

// 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)

}

echo "连接成功"

学习可以参考：http://www.runoob.com/php/php-mysql-select.html

$con=mysqli_connect("localhost","my_user","my_password","my_db")

if (mysqli_connect_errno($con))

{

echo "Failed to connect to MySQL: " . mysqli_connect_error()

}

mysqli_query($con,"SELECT * FROM Persons")

mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)

VALUES ('Glenn','Quagmire',33)")

mysqli_close($con)

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