<?php
// 假定数据库用户名:root,密码:123456,数据库:RUNOOB
$con=mysqli_connect("localhost","root","123456","RUNOOB");
if (mysqli_connect_errno($con))
{
echo "连接 MySQL 失败: " . mysqli_connect_error();
}
$sql="SELECT name,url FROM websites ORDER BY alexa";
$result=mysqli_query($con,$sql);
// 关联数组
$row=mysqli_fetch_assoc($result);
printf ("%s : %s)",$row["name"],$row["url"]);
// 释放结果集
mysqli_free_result($result);
mysqli_close($con);
?>
http://www.runoob.com/php/func-mysqli-fetch-assoc.html