数据库如何正确的连接以及关闭（PHP）

Question

我在网页的头部写了<?php require_once('Connections/member.php'); ?>
这里是member.php的代码<?php

FileName="Connection_php_mysql.htm"

Type="MYSQL"

HTTP="true"

$hostname_member = "";
$database_member = "";
$username_member = "";
$password_member = ";
$member = mysql_connect($hostname_member, $username_member, $password_member) or trigger_error(mysql_error(),E_USER_ERROR);

?>这样写经常造成流量异常，怎么改写

Answer 1

 $hostname_member = "";
$database_member = "";
$username_member = "";
$password_member = ";

 $member = mysql_connect($hostname_member, $username_member, $password_member) or trigger_error(mysql_error(),E_USER_ERROR); 

为什么你把用户名和密码都置为空再去链接呢？？我实在看不懂。。