Mysqli类的简单写法

<?php

class db

{

protected $host;

protected $user;

protected $pwd;

protected $dataBase;

function __construct($host = '', $user = '', $pwd = '', $dataBase = '')

{

$con = new mysqli('127.0.0.1', 'root', 'root', 'cw');

if ($con->connect_error) {

echo '连接失败';

}

}

function insert()

{

$sql = "";

}

function delete()

{

$sql = "";

}

function updata()

{

$sql = "";

}

function select()

{

$sql = "";

}

function __destruct()

{

$con->close(); 

}

}

?>