PHP PDO 连接数据库

<?php
class Connect_mysql
{
    /* 成员变量 */
    var $info;
    var $pdo;
    function connect()
    {
        try {
            $this->pdo = new PDO(
                "mysql:host=" . $this->info["host"] . ";dbname=" . $this->info["db_name"],
                $this->info["db_user"],
                $this->info["db_pwd"]
            ); //创建一个pdo对象
            $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);  // 设置sql语句查询如果出现问题 就会抛出异常
            //set_exception_handler("cus_exception_handler");
        } catch (PDOException $e) {
            die("connect error:" . $e->getMessage());
        }
        $this->pdo->exec("set names 'utf8'");
    }
    function init()
    {
        $this->info = array(
            'host'  => 'db',
            'db_name'   => 'frp',
            'db_user' => 'root',
            'db_pwd' => 'password',
        );
    }
    function __construct()
    {
        $this->init();
        $this->connect();
    }
}