<?php

$connect=mysqli_connect("www.20.com","root","root");
mysqli_set_charset($connect,"utf8");
if (!$connect) {
	die("链接数据库服务器失败:".mysqli_connect_error()."<br>");
}
$connect1=mysqli_select_db($connect,"book");

if(!$connect1){
	echo "连接数据库失败".mysqli_error($connect);
}

?>